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O-Ring for SAE O-Ring Boss (Straight Thread O-Ring) Fittings & Adapters, 0.38 Inch

Description & Features

Enhance the reliability of your hydraulic systems with this O-Ring designed for SAE O-Ring Boss (Straight Thread O-Ring) Fittings & Adapters. Manufactured by Hercules Sealing Products, this O-Ring features a durable Buna-N material with a hardness of 90 durometer, ensuring excellent resistance to wear and tear. With an outer diameter of 0.624 inches and an inner diameter of 0.468 inches, it is ideally suited for secure sealing in demanding industrial environments.

Engineered to perform within a temperature range of -30°F to +250°F, this O-Ring is perfect for applications requiring robust sealing under varying thermal conditions. Its precise dimensions and high-quality construction make it a reliable choice for maintaining optimal performance in hydraulic systems.

SKU: B-906

Supplier Part Number (MPN): 568-906

Alternate Part Numbers: 3-906/N90, C1CL30, H90906, MI-08748168, MINO-00407X88002

Specifications

Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	I.D. 0.468 in	Materials Buna-N (90 durometer)	O.D. 0.624 in	Supplier Part Number 568-906	Temperature Range -30 to +250	Thread Sealant No	Tube Size 0.38	Product Weight 0.01 lbs	Alternate Part Numbers Alternate Part Number 3-906/N90, Alternate Part Number 568-906, Alternate Part Number C1CL30, Alternate Part Number H90906, Alternate Part Number MI-08748168, Alternate Part Number MINO-00407X88002

Similar Products

Model Number	Tube Size	Materials	Temperature Range	I.D.	Width (E)	O.D.
22617-10 ORB Fitting/Adapter O-Ring	0.625	Buna-N (90 durometer)	-30 to +250	0.755 in	0.097	0.949 in
22617-12 ORB Fitting/Adapter O-Ring	0.75	Buna-N (90 durometer)	-30 to +250	0.924 in	0.116	1.156 in
22617-16 ORB Fitting/Adapter O-Ring	1	Buna-N (90 durometer)	-30 to +250	1.171 in	0.116	1.403 in
22617-4 ORB Fitting/Adapter O-Ring	0.25	Buna-N (90 durometer)	-30 to +250	0.351 in	0.072	0.495 in
22617-6 ORB Fitting/Adapter O-Ring	0.375	Buna-N (90 durometer)	-30 to +250	0.468 in	0.078	0.624 in
22617-8 ORB Fitting/Adapter O-Ring	0.5	Buna-N (90 durometer)	-30 to +250	0.644 in	0.087	0.818 in
B-904 ORB Fitting/Adapter O-Ring	0.25	Buna-N (90 durometer)	-30 to +250	0.351 in	0.072	0.495 in
B-912 ORB Fitting/Adapter O-Ring	0.75	Buna-N (90 durometer)	-30 to +250	0.924 in	0.116	1.156 in
B-916 ORB Fitting/Adapter O-Ring	1	Buna-N (90 durometer)	-30 to +250	1.171 in	0.116	1.403 in
22617-5 ORB Fitting/Adapter O-Ring	0.3125	Buna-N (90 durometer)	-30 to +250	0.414 in	0.072	0.558 in
B-903 ORB Fitting/Adapter O-Ring	0.188	Buna-N (90 durometer)	-30 to +250	0.301 in	0.064	0.429 in
B-906 ORB Fitting/Adapter O-Ring	0.375	Buna-N (90 durometer)	-30 to +250	0.468 in	0.078	0.624 in
B-908 ORB Fitting/Adapter O-Ring	0.5	Buna-N (90 durometer)	-30 to +250	0.644 in	0.087	0.818 in
B-910 ORB Fitting/Adapter O-Ring	0.625	Buna-N (90 durometer)	-30 to +250	0.755 in	0.097	0.949 in
B-914 ORB Fitting/Adapter O-Ring	0.875	Buna-N (90 durometer)	-30 to +250	1.047 in	0.116	1.279 in
B-920 ORB Fitting/Adapter O-Ring	1.25	Buna-N (90 durometer)	-30 to +250	1.475 in	0.118	1.711 in
B-924 ORB Fitting/Adapter O-Ring	1.5	Buna-N (90 durometer)	-30 to +250	1.72 in	0.118	1.956 in

Product Questions & Answers (2)

Question by: Harvey B on Aug 15, 2025, 9:43 AM

i’ve got an SAE ORB straight thread fitting for 3/8 tube. is this the right o-ring size or am i barkin up the wrong tree

Answer by: Customer Support on Aug 17, 2025, 8:23 AM

For a 3/8 inch tube size ORB fitting or adapter, this one matches that callout and uses a Buna-N material at 90 durometer. The dimensions are 0.468 inch ID, 0.624 inch OD, with a 0.078 inch width, which is what you want to line up when you are matching an ORB seal.

Question by: Hugh M on Dec 31, 2025, 8:47 AM

Wondering if this o-ring will fit my SAE O-ring boss fitting?

Answer by: Customer Support on Jan 2, 2026, 6:19 AM

It is specifically designed for SAE O-ring boss (straight thread O-ring) fittings and adapters, with a 0.38 inch tube size.