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70 Durometer Buna-N O-Ring, Inch OD, 4-1/4 Inch ID, 0.14 Inch Width

Description & Features

This 70 Durometer Buna-N O-Ring provides reliable sealing in a wide range of industrial applications. Constructed from durable Buna-N, it offers excellent resistance to oil, water, and other fluids, ensuring a secure and long-lasting seal.

With a nominal 4-1/2 inch outside diameter, 4-1/4 inch inside diameter, and a width of 0.14 inch, this O-ring conforms to the -244 dash size standard. It maintains its sealing properties in temperatures ranging from -40°F to 240°F. This Hercules Sealing Products O-ring is a dependable choice for demanding environments.

SKU: A-244

Supplier Part Number (MPN): 568-244

Alternate Part Numbers: C1CE98, H70244, MI-08740451, MINO-00407X90451

Specifications

Actual I.D. 4.23	Actual O.D. 4.51	Actual Width 0.139 in	Dash Size -244	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Nominal I.D. (in) 4-1/4	Nominal O.D. 4-1/2	Nominal Width 1/8	Package Qty. 10	Supplier Part Number 568-244	Alternate Part Numbers Alternate Part Number 568-244, Alternate Part Number C1CE98, Alternate Part Number H70244, Alternate Part Number MI-08740451, Alternate Part Number MINO-00407X90451	Product Weight 0.01 lbs

Similar Products

Model Number	Dash Size	Nominal I.D. (in)	Nominal O.D.	Nominal Width	Actual I.D.	Actual O.D.	Actual Width	Package Qty.
A-008 70 Durometer Buna-N O-Ring	-008	3/16	5/16	1/16	0.176	0.316	0.07 in	50
A-011 70 Durometer Buna-N O-Ring	-011	5/16	7/16	1/16	0.301	0.441	0.07 in	50
A-013 70 Durometer Buna-N O-Ring	-013	7/16	9/16	1/16	0.426	0.566	0.07 in	50
A-017 70 Durometer Buna-N O-Ring	-017	11/16	13/16	1/16	0.676	0.816	0.07 in	50
A-020 70 Durometer Buna-N O-Ring	-020	7/8	1	1/16	0.864	1.004	0.07 in	50
A-022 70 Durometer Buna-N O-Ring	-022	1	1-1/8	1/16	0.989	1.129	0.07 in	50
A-024 70 Durometer Buna-N O-Ring	-024	1-1/8	1-1/4	1/16	1.114	1.254	0.07 in	50
A-029 70 Durometer Buna-N O-Ring	-029	1-1/2	1-5/8	1/16	1.489	1.629	0.07 in	20
A-037 70 Durometer Buna-N O-Ring	-037	2-1/2	2-5/8	1/16	2.489	2.629	0.07 in	20
A-038 70 Durometer Buna-N O-Ring	-038	2-5/8	2-3/4	1/16	2.614	2.754	0.07 in	10
A-043 70 Durometer Buna-N O-Ring	-043	3-1/2	3-5/8	1/16	3.489	3.629	0.07 in	10
A-045 70 Durometer Buna-N O-Ring	-045	4	4-1/8	1/16	3.989	4.129	0.07 in	10
A-112 70 Durometer Buna-N O-Ring	-112	1/2	11/16	3/32	0.487	0.693	0.103 in	50
A-118 70 Durometer Buna-N O-Ring	-118	7/8	1-1/16	3/32	0.862	1.068	0.103 in	50
A-121 70 Durometer Buna-N O-Ring	-121	1-1/16	1-1/4	3/32	1.049	1.255	0.103 in	50
A-131-ORING 70 Durometer Buna-N O-Ring	-131	1-11/16	1-7/8	3/32	1.674	1.88	0.103 in	20
A-136 70 Durometer Buna-N O-Ring	-136	2	2-3/16	3/32	1.987	2.193	0.103 in	20
A-140 70 Durometer Buna-N O-Ring	-140	2-1/4	2-7/16	3/32	2.237	2.443	0.103 in	20
A-146 70 Durometer Buna-N O-Ring	-146	2-5/8	2-13/16	3/32	2.612	2.818	0.103 in	20
A-152 70 Durometer Buna-N O-Ring	-152	3-1/4	3-7/16	3/32	3.237	3.443	0.103 in	10
A-159 70 Durometer Buna-N O-Ring	-159	5	5-3/16	3/32	4.987	5.193	0.103 in	4
A-169 70 Durometer Buna-N O-Ring	-169	7-1/2	7-11/16	3/32	7.487	7.693	0.103 in	2
A-214 70 Durometer Buna-N O-Ring	-214	1	1-1/4	1/8	0.984	1.262	0.139 in	20
A-218 70 Durometer Buna-N O-Ring	-218	1-1/4	1-1/2	1/8	1.234	1.512	0.139 in	20
A-221 70 Durometer Buna-N O-Ring	-221	1-7/16	1-11/16	1/8	1.421	1.699	0.139 in	20
A-231 70 Durometer Buna-N O-Ring	-231	2-5/8	2-7/8	1/8	2.609	2.887	0.139 in	10
A-232 70 Durometer Buna-N O-Ring	-232	2-3/4	3	1/8	2.734	3.012	0.139 in	10
A-233 70 Durometer Buna-N O-Ring	-233	2-7/8	3-1/8	1/8	2.859	3.137	0.139 in	10
A-234 70 Durometer Buna-N O-Ring	-234	3	3-1/4	1/8	2.984	3.262	0.139 in	10
A-236 70 Durometer Buna-N O-Ring	-236	3-1/4	3-1/2	1/8	3.234	3.512	0.139 in	10
A-238-ORING 70 Durometer Buna-N O-Ring	-238	3-1/2	3-3/4	1/8	3.484	3.762	0.139 in	10
A-242-ORING 70 Durometer Buna-N O-Ring	-242	4	4-1/4	1/8	3.984	4.262	0.139 in	10
A-244 70 Durometer Buna-N O-Ring	-244	4-1/4	4-1/2	1/8	4.234	4.512	0.139 in	10
A-248 70 Durometer Buna-N O-Ring	-248	4-3/4	5	1/8	4.734	5.012	0.139 in	4
A-251 70 Durometer Buna-N O-Ring	-251	5-1/8	5-3/8	1/8	5.109	5.387	0.139 in	4
A-252 70 Durometer Buna-N O-Ring	-252	5-1/4	5-1/2	1/8	5.234	5.512	0.139 in	4
A-256 70 Durometer Buna-N O-Ring	-256	5-3/4	6	1/8	5.734	6.012	0.139 in	4
A-329 70 Durometer Buna-N O-Ring	-329	2	2-3/8	3/16	1.975	2.395	0.21 in	20
A-334 70 Durometer Buna-N O-Ring	-334	2-5/8	3	3/16	2.6	3.02	0.21 in	20
A-338 70 Durometer Buna-N O-Ring	-338	3-1/8	3-1/2	3/16	3.1	3.52	0.21 in	10
A-342 70 Durometer Buna-N O-Ring	-342	3-5/8	4	3/16	3.6	4.02	0.21 in	4
A-346 70 Durometer Buna-N O-Ring	-346	4-1/8	4-1/2	3/16	4.1	4.52	0.21 in	4
568-450 70 Durometer Buna-N O-Ring	-450	10-1/2	11	1/4	10.475	11.025	0.275 in	1
A-003 70 Durometer Buna-N O-Ring	-003	1/16	3/16	1/16	0.056	0.176	0.06 in	50
A-005 70 Durometer Buna-N O-Ring	-005	3/32	7/32	1/16	0.101	0.241	0.07 in	50
A-006 70 Durometer Buna-N O-Ring	-006	1/8	1/4	1/16	0.114	0.254	0.07 in	50
A-007 70 Durometer Buna-N O-Ring	-007	5/32	9/32	1/16	0.145	0.285	0.07 in	50
A-009 70 Durometer Buna-N O-Ring	-009	7/32	11/32	1/16	0.208	0.348	0.07 in	50
A-010 70 Durometer Buna-N O-Ring	-010	1/4	3/8	1/16	0.239	0.379	0.07 in	50
A-012 70 Durometer Buna-N O-Ring	-012	3/8	1/2	1/16	0.364	0.504	0.07 in	50
A-014 70 Durometer Buna-N O-Ring	-014	1/2	5/8	1/16	0.489	0.629	0.07 in	50
A-015 70 Durometer Buna-N O-Ring	-015	9/16	11/16	1/16	0.551	0.691	0.07 in	50
A-016 70 Durometer Buna-N O-Ring	-016	5/8	3/4	1/16	0.614	0.754	0.07 in	50
A-019 70 Durometer Buna-N O-Ring	-019	13/16	15/16	1/16	0.801	0.941	0.07 in	50
A-021 70 Durometer Buna-N O-Ring	-021	15/16	1-1/16	1/16	0.926	1.066	0.07 in	50
A-023 70 Durometer Buna-N O-Ring	-023	1-1/16	1-3/16	1/16	1.051	1.191	0.07 in	50
A-025 70 Durometer Buna-N O-Ring	-025	1-3/16	1-5/16	1/16	1.176	1.316	0.07 in	50
A-026 70 Durometer Buna-N O-Ring	-026	1-1/4	1-3/8	1/16	1.239	1.379	0.07 in	50
A-027 70 Durometer Buna-N O-Ring	-027	1-5/16	1-7/16	1/16	1.301	1.441	0.07 in	50
A-028 70 Durometer Buna-N O-Ring	-028	1-3/8	1-1/2	1/16	1.364	1.504	0.07 in	20
A-030 70 Durometer Buna-N O-Ring	-030	1-5/8	1-3/4	1/16	1.614	1.754	0.07 in	20
A-031 70 Durometer Buna-N O-Ring	-031	1-3/4	1-7/8	1/16	1.739	1.879	0.07 in	20
A-032 70 Durometer Buna-N O-Ring	-032	1-7/8	2	1/16	1.864	2.004	0.07 in	20
A-033 70 Durometer Buna-N O-Ring	-033	2	2-1/8	1/16	1.989	2.129	0.07 in	20
A-034 70 Durometer Buna-N O-Ring	-034	2-1/8	2-1/4	1/16	2.114	2.254	0.07 in	20
A-035 70 Durometer Buna-N O-Ring	-035	2-1/4	2-3/8	1/16	2.239	2.379	0.07 in	20
A-036 70 Durometer Buna-N O-Ring	-036	2-3/8	2-1/2	1/16	2.364	2.504	0.07 in	20
A-039 70 Durometer Buna-N O-Ring	-039	2-3/4	2-7/8	1/16	2.739	2.879	0.07 in	10
A-040 70 Durometer Buna-N O-Ring	-040	2-7/8	3	1/16	2.864	3.004	0.07 in	10
A-041 70 Durometer Buna-N O-Ring	-041	3	3-1/8	1/16	2.989	3.129	0.07 in	10
A-042 70 Durometer Buna-N O-Ring	-042	3-1/4	3-3/8	1/16	3.239	3.379	0.07 in	10
A-044 70 Durometer Buna-N O-Ring	-044	3-3/4	3-7/8	1/16	3.739	3.879	0.07 in	10
A-048 70 Durometer Buna-N O-Ring	-048	4-3/4	4-7/8	1/16	4.739	4.879	0.07 in	4
A-049 70 Durometer Buna-N O-Ring	-049	5	5-1/8	1/16	4.989	5.129	0.07 in	4
A-106 70 Durometer Buna-N O-Ring	-106	3/16	3/8	3/32	0.174	0.38	0.103 in	50
A-107 70 Durometer Buna-N O-Ring	-107	7/32	13/32	3/32	0.206	0.412	0.103 in	50
A-108 70 Durometer Buna-N O-Ring	-108	1/4	7/16	3/32	0.237	0.443	0.103 in	50
A-109 70 Durometer Buna-N O-Ring	-109	5/16	1/2	3/32	0.299	0.505	0.103 in	50
A-110-ORING 70 Durometer Buna-N O-Ring	-110	3/8	9/16	3/32	0.362	0.568	0.103 in	50
A-111 70 Durometer Buna-N O-Ring	-111	7/16	5/8	3/32	0.424	0.63	0.103 in	50
A-114 70 Durometer Buna-N O-Ring	-114	5/8	13/16	3/32	0.612	0.818	0.103 in	50
A-115 70 Durometer Buna-N O-Ring	-115	11/16	7/8	3/32	0.674	0.88	0.103 in	50
A-116 70 Durometer Buna-N O-Ring	-116	3/4	15/16	3/32	0.737	0.943	0.103 in	50
A-117 70 Durometer Buna-N O-Ring	-117	13/16	1	3/32	0.799	1.005	0.103 in	50
A-119 70 Durometer Buna-N O-Ring	-119	15/16	1-1/8	3/32	0.924	1.13	0.103 in	50
A-120 70 Durometer Buna-N O-Ring	-120	1	1-3/16	3/32	0.987	1.193	0.103 in	50
A-122 70 Durometer Buna-N O-Ring	-122	1-1/8	1-5/16	3/32	1.112	1.318	0.103 in	20
A-123 70 Durometer Buna-N O-Ring	-123	1-3/16	1-3/8	3/32	1.174	1.38	0.103 in	20
A-124 70 Durometer Buna-N O-Ring	-124	1-1/4	1-7/16	3/32	1.237	1.443	0.103 in	20
A-125 70 Durometer Buna-N O-Ring	-125	1-5/16	1-1/2	3/32	1.299	1.505	0.103 in	20
A-126 70 Durometer Buna-N O-Ring	-126	1-3/8	1-9/16	3/32	1.362	1.568	0.103 in	20
A-127 70 Durometer Buna-N O-Ring	-127	1-7/16	1-5/8	3/32	1.424	1.63	0.103 in	20
A-128 70 Durometer Buna-N O-Ring	-128	1-1/2	1-11/16	3/32	1.487	1.693	0.103 in	20
A-129-ORING 70 Durometer Buna-N O-Ring	-129	1-9/16	1-3/4	3/32	1.549	1.755	0.103 in	20
A-130 70 Durometer Buna-N O-Ring	-130	1-5/8	1-13/16	3/32	1.612	1.818	0.103 in	20
A-132-ORING 70 Durometer Buna-N O-Ring	-132	1-3/4	1-15/16	3/32	1.737	1.943	0.103 in	20
A-133 70 Durometer Buna-N O-Ring	-133	1-13/16	2	3/32	1.799	2.005	0.103 in	20
A-134 70 Durometer Buna-N O-Ring	-134	1-7/8	2-1/16	3/32	1.862	2.068	0.103 in	20
A-135 70 Durometer Buna-N O-Ring	-135	1-15/16	2-1/8	3/32	1.925	2.131	0.103 in	20
A-138 70 Durometer Buna-N O-Ring	-138	2-1/8	2-5/16	3/32	2.112	2.318	0.103 in	20
A-139 70 Durometer Buna-N O-Ring	-139	2-3/16	2-3/8	3/32	2.175	2.381	0.103 in	20
A-141-ORING 70 Durometer Buna-N O-Ring	-141	2-5/16	2-1/2	3/32	2.3	2.506	0.103 in	20
A-142 70 Durometer Buna-N O-Ring	-142	2-3/8	2-9/16	3/32	2.362	2.568	0.103 in	20
A-143 70 Durometer Buna-N O-Ring	-143	2-7/16	2-5/8	3/32	2.425	2.631	0.103 in	20
A-144 70 Durometer Buna-N O-Ring	-144	2-1/2	2-11/16	3/32	2.487	2.693	0.103 in	20
A-145 70 Durometer Buna-N O-Ring	-145	2-9/16	2-3/4	3/32	2.55	2.756	0.103 in	20
A-147 70 Durometer Buna-N O-Ring	-147	2-11/16	2-7/8	3/32	2.675	2.881	0.103 in	20
A-148 70 Durometer Buna-N O-Ring	-148	2-3/4	2-15/16	3/32	2.737	2.943	0.103 in	10
A-149 70 Durometer Buna-N O-Ring	-149	2-13/16	3	3/32	2.8	3.006	0.103 in	10
A-150 70 Durometer Buna-N O-Ring	-150	2-7/8	3-1/16	3/32	2.862	3.068	0.103 in	10
A-151 70 Durometer Buna-N O-Ring	-151	3	3-3/16	3/32	2.987	3.193	0.103 in	10
A-153 70 Durometer Buna-N O-Ring	-153	3-1/2	3-11/16	3/32	3.487	3.693	0.103 in	10
A-154 70 Durometer Buna-N O-Ring	-154	3-3/4	3-15/16	3/32	3.737	3.943	0.103 in	10
A-155 70 Durometer Buna-N O-Ring	-155	4	4-3/16	3/32	3.987	4.193	0.103 in	10
A-156 70 Durometer Buna-N O-Ring	-156	4-1/4	4-7/16	3/32	4.237	4.443	0.103 in	10
A-157 70 Durometer Buna-N O-Ring	-157	4-1/2	4-11/16	3/32	4.487	4.693	0.103 in	4
A-158 70 Durometer Buna-N O-Ring	-158	4-3/4	4-15/16	3/32	4.737	4.943	0.103 in	4
A-160 70 Durometer Buna-N O-Ring	-160	5-1/4	5-7/16	3/32	5.237	5.443	0.103 in	4
A-161 70 Durometer Buna-N O-Ring	-161	5-1/2	5-11/16	3/32	5.487	5.693	0.103 in	4
A-163 70 Durometer Buna-N O-Ring	-163	6	6-3/16	3/32	5.987	6.193	0.103 in	2
A-164 70 Durometer Buna-N O-Ring	-164	6-1/4	6-7/16	3/32	6.237	6.443	0.103 in	2
A-170 70 Durometer Buna-N O-Ring	-170	7-3/4	7-15/16	3/32	7.737	7.943	0.103 in	2
A-172 70 Durometer Buna-N O-Ring	-172	8-1/4	8-7/16	3/32	8.237	8.443	0.103 in	2
A-202 70 Durometer Buna-N O-Ring	-202	1/4	1/2	1/8	0.234	0.512	0.139 in	50
A-203 70 Durometer Buna-N O-Ring	-203	5/16	9/16	1/8	0.296	0.574	0.139 in	50
A-204 70 Durometer Buna-N O-Ring	-204	3/8	5/8	1/8	0.359	0.637	0.139 in	50
A-205 70 Durometer Buna-N O-Ring	-205	7/16	11/16	1/8	0.421	0.699	0.139 in	50
A-206 70 Durometer Buna-N O-Ring	-206	1/2	3/4	1/8	0.484	0.762	0.139 in	50
A-208 70 Durometer Buna-N O-Ring	-208	5/8	7/8	1/8	0.609	0.887	0.139 in	20
A-209 70 Durometer Buna-N O-Ring	-209	11/16	15/16	1/8	0.671	0.949	0.139 in	20
A-210-ORING 70 Durometer Buna-N O-Ring	-210	3/4	1	1/8	0.734	1.012	0.139 in	20
A-213 70 Durometer Buna-N O-Ring	-213	15/16	1-3/16	1/8	0.921	1.199	0.139 in	20
A-215 70 Durometer Buna-N O-Ring	-215	1-1/16	1-5/16	1/8	1.046	1.324	0.139 in	20
A-216 70 Durometer Buna-N O-Ring	-216	1-1/8	1-3/8	1/8	1.109	1.387	0.139 in	20
A-217 70 Durometer Buna-N O-Ring	-217	1-3/16	1-7/16	1/8	1.171	1.449	0.139 in	20
A-219 70 Durometer Buna-N O-Ring	-219	1-5/16	1-9/16	1/8	1.296	1.574	0.139 in	20
A-220 70 Durometer Buna-N O-Ring	-220	1-3/8	1-5/8	1/8	1.359	1.637	0.139 in	20
A-222 70 Durometer Buna-N O-Ring	-222	1-1/2	1-3/4	1/8	1.484	1.762	0.139 in	20
A-223 70 Durometer Buna-N O-Ring	-223	1-5/8	1-7/8	1/8	1.609	1.887	0.139 in	20
A-224 70 Durometer Buna-N O-Ring	-224	1-3/4	2	1/8	1.734	2.012	0.139 in	20
A-225 70 Durometer Buna-N O-Ring	-225	1-7/8	2-1/8	1/8	1.859	2.137	0.139 in	20
A-226 70 Durometer Buna-N O-Ring	-226	2	2-1/4	1/8	1.984	2.262	0.139 in	20
A-227 70 Durometer Buna-N O-Ring	-227	2-1/8	2-3/8	1/8	2.109	2.387	0.139 in	20
A-229 70 Durometer Buna-N O-Ring	-229	2-3/8	2-5/8	1/8	2.359	2.637	0.139 in	20
A-230 70 Durometer Buna-N O-Ring	-230	2-1/2	2-3/4	1/8	2.484	2.762	0.139 in	10
A-234-VITON 70 Durometer Buna-N O-Ring	-234	3	3-1/4	1/8	2.984	3.262	0.139 in	10
A-235 70 Durometer Buna-N O-Ring	-235	3-1/8	3-3/8	1/8	3.109	3.387	0.139 in	10
A-237 70 Durometer Buna-N O-Ring	-237	3-3/8	3-5/8	1/8	3.359	3.637	0.139 in	10
A-239-ORING 70 Durometer Buna-N O-Ring	-239	3-5/8	3-7/8	1/8	3.609	3.887	0.139 in	10
A-240-ORING 70 Durometer Buna-N O-Ring	-240	3-3/4	4	1/8	3.734	4.012	0.139 in	10
A-241-ORING 70 Durometer Buna-N O-Ring	-241	3-7/8	4-1/8	1/8	3.859	4.137	0.139 in	10
A-243 70 Durometer Buna-N O-Ring	-243	4-1/8	4-3/8	1/8	4.109	4.387	0.139 in	10
A-245 70 Durometer Buna-N O-Ring	-245	4-3/8	4-5/8	1/8	4.359	4.637	0.139 in	4
A-246 70 Durometer Buna-N O-Ring	-246	4-1/2	4-3/4	1/8	4.484	4.762	0.139 in	4
A-247 70 Durometer Buna-N O-Ring	-247	4-5/8	4-7/8	1/8	4.609	4.887	0.139 in	4
A-249 70 Durometer Buna-N O-Ring	-249	4-7/8	5-1/8	1/8	4.859	5.137	0.139 in	4
A-250 70 Durometer Buna-N O-Ring	-250	5	5-1/4	1/8	4.984	5.262	0.139 in	4
A-253 70 Durometer Buna-N O-Ring	-253	5-3/8	5-5/8	1/8	5.359	5.637	0.139 in	4
A-254 70 Durometer Buna-N O-Ring	-254	5-1/2	5-3/4	1/8	5.484	5.762	0.139 in	4
A-255 70 Durometer Buna-N O-Ring	-255	5-5/8	5-7/8	1/8	5.609	5.887	0.139 in	4
A-257 70 Durometer Buna-N O-Ring	-257	5-7/8	6-1/8	1/8	5.859	6.137	0.139 in	2
A-258-ORING 70 Durometer Buna-N O-Ring	-258	6	6-1/4	1/8	5.984	6.262	0.139 in	2
A-259 70 Durometer Buna-N O-Ring	-259	6-1/4	6-1/2	1/8	6.234	6.512	0.139 in	2
A-260 70 Durometer Buna-N O-Ring	-260	6-1/2	6-3/4	1/8	6.484	6.762	0.139 in	2
A-261 70 Durometer Buna-N O-Ring	-261	6-3/4	7	1/8	6.734	7.012	0.139 in	2
A-262 70 Durometer Buna-N O-Ring	-262	7	7-1/4	1/8	6.984	7.262	0.139 in	2
A-263 70 Durometer Buna-N O-Ring	-263	7-1/4	7-1/2	1/8	7.234	7.512	0.139 in	2
A-264 70 Durometer Buna-N O-Ring	-264	7-1/2	7-3/4	1/8	7.484	7.762	0.139 in	2
A-265 70 Durometer Buna-N O-Ring	-265	7-3/4	8	1/8	7.734	8.012	0.139 in	2
A-266 70 Durometer Buna-N O-Ring	-266	8	8-1/4	1/8	7.984	8.262	0.139 in	2
A-267 70 Durometer Buna-N O-Ring	-267	8-1/4	8-1/2	1/8	8.234	8.512	0.139 in	2
A-268 70 Durometer Buna-N O-Ring	-268	8-1/2	8-3/4	1/8	8.484	8.762	0.139 in	2
A-269 70 Durometer Buna-N O-Ring	-269	8-3/4	9	1/8	8.734	9.012	0.139 in	2
A-274 70 Durometer Buna-N O-Ring	-274	10	10-1/4	1/8	9.984	10.262	0.139 in	2
A-275 70 Durometer Buna-N O-Ring	-275	10-1/2	10-3/4	1/8	10.484	10.762	0.139 in	2
A-276 70 Durometer Buna-N O-Ring	-276	11	11-1/4	1/8	10.984	11.262	0.139 in	1
A-277 70 Durometer Buna-N O-Ring	-277	11-1/2	11-3/4	1/8	11.484	11.762	0.139 in	1
A-278 70 Durometer Buna-N O-Ring	-278	12	12-1/4	1/8	11.984	12.262	0.139 in	1
A-282 70 Durometer Buna-N O-Ring	-282	16	16-1/4	1/8	15.955	16.233	0.139 in	1
A-311 70 Durometer Buna-N O-Ring	-311	9/16	15/16	3/16	0.537	0.957	0.21 in	50
A-312 70 Durometer Buna-N O-Ring	-312	5/8	1	3/16	0.6	1.02	0.21 in	50
A-313 70 Durometer Buna-N O-Ring	-313	11/16	1-1/16	3/16	0.662	1.082	0.21 in	50
A-314 70 Durometer Buna-N O-Ring	-314	3/4	1-1/8	3/16	0.725	1.145	0.21 in	50
A-315 70 Durometer Buna-N O-Ring	-315	13/16	1-3/16	3/16	0.787	1.207	0.21 in	20
A-316 70 Durometer Buna-N O-Ring	-316	7/8	1-1/4	3/16	0.85	1.27	0.21 in	50
A-318 70 Durometer Buna-N O-Ring	-318	1	1-3/8	3/16	0.975	1.395	0.21 in	20
A-319 70 Durometer Buna-N O-Ring	-319	1-1/16	1-7/16	3/16	1.037	1.457	0.21 in	50
A-320 70 Durometer Buna-N O-Ring	-320	1-1/8	1-1/2	3/16	1.1	1.52	0.21 in	20
A-321 70 Durometer Buna-N O-Ring	-321	1-3/16	1-9/16	3/16	1.162	1.582	0.21 in	20
A-322 70 Durometer Buna-N O-Ring	-322	1-1/4	1-5/8	3/16	1.225	1.645	0.21 in	20
A-323 70 Durometer Buna-N O-Ring	-323	1-5/16	1-11/16	3/16	1.287	1.707	0.21 in	10
A-324 70 Durometer Buna-N O-Ring	-324	1-3/8	1-3/4	3/16	1.35	1.77	0.21 in	20
A-325 70 Durometer Buna-N O-Ring	-325	1-1/2	1-7/8	3/16	1.475	1.895	0.21 in	20
A-326 70 Durometer Buna-N O-Ring	-326	1-5/8	2	3/16	1.6	2.02	0.21 in	20
A-327 70 Durometer Buna-N O-Ring	-327	1-3/4	2-1/8	3/16	1.725	2.145	0.21 in	20
A-328 70 Durometer Buna-N O-Ring	-328	1-7/8	2-1/4	3/16	1.85	2.27	0.21 in	20
A-331 70 Durometer Buna-N O-Ring	-331	2-1/4	2-5/8	3/16	2.225	2.645	0.21 in	20
A-332 70 Durometer Buna-N O-Ring	-332	2-3/8	2-3/4	3/16	2.35	2.77	0.21 in	20
A-333 70 Durometer Buna-N O-Ring	-333	2-1/2	2-7/8	3/16	2.475	2.895	0.21 in	20
A-335 70 Durometer Buna-N O-Ring	-335	2-3/4	3-1/8	3/16	2.725	3.145	0.21 in	10
A-336 70 Durometer Buna-N O-Ring	-336	2-7/8	3-1/4	3/16	2.85	3.27	0.21 in	10
A-337 70 Durometer Buna-N O-Ring	-337	3	3-3/8	3/16	2.975	3.395	0.21 in	10
A-339 70 Durometer Buna-N O-Ring	-339	3-1/4	3-5/8	3/16	3.225	3.645	0.21 in	10
A-340 70 Durometer Buna-N O-Ring	-340	3-3/8	3-3/4	3/16	3.35	3.77	0.21 in	10
A-343 70 Durometer Buna-N O-Ring	-343	3-3/4	4-1/8	3/16	3.725	4.145	0.21 in	4
A-344 70 Durometer Buna-N O-Ring	-344	3-7/8	4-1/4	3/16	3.85	4.27	0.21 in	4
A-347 70 Durometer Buna-N O-Ring	-347	4-1/4	4-5/8	3/16	4.225	4.645	0.21 in	4
A-348 70 Durometer Buna-N O-Ring	-348	4-3/8	4-3/4	3/16	4.35	4.77	0.21 in	4
A-349 70 Durometer Buna-N O-Ring	-349	4-1/2	4-7/8	3/16	4.475	4.895	0.21 in	4
A-350 70 Durometer Buna-N O-Ring	-350	4-5/8	5	3/16	4.6	5.02	0.21 in	4
A-351 70 Durometer Buna-N O-Ring	-351	4-3/4	5-1/8	3/16	4.725	5.145	0.21 in	4
A-352 70 Durometer Buna-N O-Ring	-352	4-7/8	5-1/4	3/16	4.85	5.27	0.21 in	4
A-353 70 Durometer Buna-N O-Ring	-353	5	5-3/8	3/16	4.975	5.395	0.21 in	4
A-355 70 Durometer Buna-N O-Ring	-355	5-1/4	5-5/8	3/16	5.225	5.645	0.21 in	4
A-356 70 Durometer Buna-N O-Ring	-356	5-3/8	5-3/4	3/16	5.35	5.77	0.21 in	4
A-358 70 Durometer Buna-N O-Ring	-358	5-5/8	6	3/16	5.6	6.02	0.21 in	4
A-360 70 Durometer Buna-N O-Ring	-360	5-7/8	6-1/4	3/16	5.85	6.27	0.21 in	4
A-362 70 Durometer Buna-N O-Ring	-362	6-1/4	6-5/8	3/16	6.225	6.645	0.21 in	4
A-363 70 Durometer Buna-N O-Ring	-363	6-1/2	6-7/8	3/16	6.475	6.895	0.21 in	4
A-364 70 Durometer Buna-N O-Ring	-364	6-3/4	7-1/8	3/16	6.725	7.145	0.21 in	4
A-366 70 Durometer Buna-N O-Ring	-366	7-1/4	7-5/8	3/16	7.225	7.645	0.21 in	2
A-367 70 Durometer Buna-N O-Ring	-367	7-1/2	7-7/8	3/16	7.475	7.895	0.21 in	2
A-378 70 Durometer Buna-N O-Ring	-378	10-1/2	10-7/8	3/16	10.475	10.895	0.21 in	1
A-426 70 Durometer Buna-N O-Ring	-426	4-5/8	5-1/8	1/4	4.6	5.15	0.275 in	4
A-427 70 Durometer Buna-N O-Ring	-427	4-3/4	5-1/4	1/4	4.725	5.275	0.275 in	4
A-428 70 Durometer Buna-N O-Ring	-428	4-7/8	5-3/8	1/4	4.85	5.4	0.275 in	4
A-429 70 Durometer Buna-N O-Ring	-429	5	5-1/2	1/4	4.975	5.525	0.275 in	4
A-432 70 Durometer Buna-N O-Ring	-432	5-3/8	5-7/8	1/4	5.35	5.9	0.275 in	4
A-434 70 Durometer Buna-N O-Ring	-434	5-5/8	6-1/8	1/4	5.6	6.15	0.275 in	4
A-435 70 Durometer Buna-N O-Ring	-435	5-3/4	6-1/4	1/4	5.725	6.275	0.275 in	4
A-436 70 Durometer Buna-N O-Ring	-436	5-7/8	6-3/8	1/4	5.85	6.4	0.275 in	4
A-437 70 Durometer Buna-N O-Ring	-437	6	6-1/2	1/4	5.975	6.525	0.275 in	2
A-438 70 Durometer Buna-N O-Ring	-438	6-1/4	6-3/4	1/4	6.225	6.775	0.275 in	2
A-439 70 Durometer Buna-N O-Ring	-439	6-1/2	7	1/4	6.475	7.025	0.275 in	2
A-441 70 Durometer Buna-N O-Ring	-441	7	7-1/2	1/4	6.975	7.525	0.275 in	2
A-443 70 Durometer Buna-N O-Ring	-443	7-1/2	8	1/4	7.475	8.025	0.275 in	2
A-446 70 Durometer Buna-N O-Ring	-446	8-1/2	9	1/4	8.475	9.025	0.275 in	2
A-448 70 Durometer Buna-N O-Ring	-448	9-1/2	10	1/4	9.475	10.025	0.275 in	2
A-345 70 Durometer Buna-N O-Ring	-345	4	4-3/8	3/16	3.975	4.395	0.21 in	4
A-113 70 Durometer Buna-N O-Ring	-113	9/16	3/4	3/32	0.549	0.755	0.103 in	50
A-137 70 Durometer Buna-N O-Ring	-137	2-1/16	2-1/4	3/32	2.05	2.256	0.103 in	20
A-207 70 Durometer Buna-N O-Ring	-207	9/16	13/16	1/8	0.546	0.824	0.139 in	50
A-211 70 Durometer Buna-N O-Ring	-211	13/16	1-1/16	1/8	0.796	1.074	0.139 in	20
A-212 70 Durometer Buna-N O-Ring	-212	7/8	1-1/8	1/8	0.859	1.137	0.139 in	20
A-228 70 Durometer Buna-N O-Ring	-228	2-1/4	2-1/2	1/8	2.234	2.512	0.139 in	20
A-330 70 Durometer Buna-N O-Ring	-330	2-1/8	2-1/2	3/16	2.1	2.52	0.21 in	20
A-341 70 Durometer Buna-N O-Ring	-341	3-1/2	3-7/8	3/16	3.475	3.895	0.21 in	4
A-354 70 Durometer Buna-N O-Ring	-354	5-1/8	5-1/2	3/16	5.1	5.52	0.21 in	4
A-357 70 Durometer Buna-N O-Ring	-357	5-1/2	5-7/8	3/16	5.475	5.895	0.21 in	4
A-425 70 Durometer Buna-N O-Ring	-425	4-1/2	5	1/4	4.475	5.025	0.275 in	4
A-433 70 Durometer Buna-N O-Ring	-433	5-1/2	6	1/4	5.475	6.025	0.275 in	4
A-440 70 Durometer Buna-N O-Ring	-440	6-3/4	7-1/4	1/4	6.725	7.275	0.275 in	2

Product Questions & Answers (6)

Question by: Randy R on Jul 27, 2025, 7:20 AM

i got an old o-ring marked -244, is this the same size or am i gonna be off a hair

Answer by: Customer Support on Jul 28, 2025, 12:53 PM

Match-up wise, dash size -244 is the key identifier here. The nominal size is 4-1/4 inch ID by 4-1/2 inch OD with a 1/8 inch nominal width, and the actual dimensions are 4.234 inch ID, 4.512 inch OD, and 0.139 inch width.

Question by: Janet M on Nov 13, 2025, 3:28 PM

What size is this o-ring, exactly? I need to make sure it'll fit.

Answer by: Customer Support on Nov 15, 2025, 6:49 AM

It measures 4.512 inches on the outside, 4.234 inches inside, and the width is 0.139 inches.

Question by: Shawn R on Oct 26, 2025, 6:45 PM

got a seal on an old hydraulic cylinder that measures right around 4.234 on the inside and about 4.512 on the outside -- this the right ring for that?

Answer by: Customer Support on Oct 28, 2025, 10:22 AM

Those numbers match up exactly. The actual ID on this o-ring is 4.234 inches and the actual OD is 4.512, with a cross-section width of 0.139 inch. If your worn seal measures close to those dimensions, this is the correct replacement. Just make sure the groove depth and width in your cylinder are sized for a 1/8 inch nominal cross-section before you seat it.

Question by: Dean M on May 8, 2025, 9:29 PM

What's the temperature range on this O-ring? Gotta make sure it can handle the heat where I'm usin' it.

Answer by: Customer Support on May 10, 2025, 7:42 PM

This Hercules O-ring is made from 70 Durometer Buna-N and is rated to handle temperatures from -40°F up to 240°F.

Question by: Dwayne S on Sep 24, 2025, 12:43 PM

does this o-ring hold up alright in hydraulic fluid, or is buna-n gonna break down on me over time?

Answer by: Customer Support on Sep 25, 2025, 1:35 PM

Buna-N is one of the more reliable choices for petroleum-based hydraulic fluid. It resists oil well and holds its shape under pressure in standard hydraulic applications. At 70 durometer, the hardness sits right in the middle range, firm enough to handle compression without being brittle. The temperature rating runs from -40°F up to 240°F, so it covers most shop and field conditions without issue.

Question by: Earl G on Dec 31, 2025, 1:44 PM

i’ve got an old -244 o-ring on the bench. is this the right one, or are these measurements different?

Answer by: Customer Support on Jan 1, 2026, 6:00 PM

For dash size -244, the nominal size is 4-1/4 inch ID, 4-1/2 inch OD, with a 1/8 inch nominal width. The actual measured dimensions listed are about 4.234 inch ID, 4.512 inch OD, and 0.139 inch width, so it should line up with a -244 you are replacing.