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O-Ring for SAE O-Ring Boss (Straight Thread O-Ring) Fittings & Adapters, 0.75 Inch

Description & Features

Ideal for industrial applications, this O-Ring is designed specifically for SAE O-Ring Boss (Straight Thread O-Ring) fittings and adapters, ensuring a secure seal for hydraulic systems. Crafted from durable Buna-N with a 90 durometer hardness, it offers reliable performance in demanding environments. The O-Ring features an outer diameter of 1.156 inches and an inner diameter of 0.924 inches, making it suitable for 0.75-inch tube sizes. With a temperature range from -30°F to +250°F, it is well-suited for use in various conditions.

Manufactured by Hercules Sealing Products, this O-Ring for SAE O-Ring Boss fittings is part of their trusted range, recognized for its quality and durability. This component is essential for maintaining the integrity and efficiency of hydraulic systems, providing a dependable solution for preventing leaks and ensuring optimal performance.

SKU: B-912

Supplier Part Number (MPN): 568-912

Alternate Part Numbers: 3-912, C1CL33, H90912, MI-08748175, MINO-00407X88005

Specifications

Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	I.D. 0.924 in	Materials Buna-N (90 durometer)	O.D. 1.156 in	Supplier Part Number 568-912	Temperature Range -30 to +250	Thread Sealant No	Tube Size 0.75	Product Weight 0.01 lbs	Alternate Part Numbers Alternate Part Number 3-912, Alternate Part Number 568-912, Alternate Part Number C1CL33, Alternate Part Number H90912, Alternate Part Number MI-08748175, Alternate Part Number MINO-00407X88005

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 (4)

Question by: Warren W on Dec 11, 2025, 7:55 PM

What size o-ring is this? I need one for a .75 inch tube.

Answer by: Customer Support on Dec 13, 2025, 7:07 PM

This O-ring is designed for SAE O-Ring Boss fittings and adapters with a 0.75 inch tube size.

Question by: Kirk E on Aug 9, 2025, 5:54 PM

Will this O-ring work on a 3/4 inch SAE fitting?

Answer by: Customer Support on Aug 10, 2025, 6:17 PM

This O-ring is designed to fit a 0.75 inch SAE O-ring boss (straight thread O-ring) fitting or adapter.

Question by: Kurt A on Jun 23, 2025, 10:32 AM

i’ve got a 3/4 ORB straight thread fitting, is this the right o-ring size or am i gonna be fighting leaks

Answer by: Customer Support on Jun 25, 2025, 6:58 AM

For a 0.75 inch tube size SAE O-Ring Boss setup, this O-ring is the matching ORB fitting and adapter seal size. It is Buna-N at 90 durometer with a 0.924 inch ID and 1.156 inch OD, which is what sets the fit on the boss.

Question by: Joyce J on Sep 21, 2025, 9:27 AM

what size tube is this o-ring meant to go with? got a 3/4 inch ORB fitting and want to make sure i'm grabbing the right one

Answer by: Customer Support on Sep 23, 2025, 6:28 AM

For a 0.75 inch SAE O-Ring Boss fitting, this is the correct o-ring. The inside diameter runs 0.924 inches, the outside diameter is 1.156 inches, and the width comes in at 0.116 inches. Those dimensions are built specifically for straight thread ORB fittings and adapters at that tube size, so you're in the right place.