Precision Associates' Nitrile (NBR) Compounds

Nitrile (NBR) is a copolymer of Acrylonitrile and Butadiene rubbers. The ratio of the two polymers affects the properties of a rubber compound. Raising the acrylonitrile content will increase resistance to oil and solvents and improve abrasion resistance. Lowering the acrylonitrile content improves low temperature properties, compression set and fuel resistance.

While Nitrile rubber is considered to be a general purpose material for O-Rings and many other seals, it can be specifically compounded for many purposes. Grades are available for: food processing, use with milk and edible oils, potable water and other specialty applications. Internal lubricants may be added to reduce frictional properties and extend wear. Specialty Nitrile polymers can be produced by carboxylation (see carboxylated Nitrile) or hydrogenation (see HNBR).

The service temperature for PAI Nitrile compounds varies on the low end from -90º to -15º F (-65º to -25º C) depending on acrylonitrile content. On the high side continuous service varies from 225º F to 300º F depending on the curing agent used. PAI offers NBR compounds in hardness ranges from 30 to 95 durometer. Black is the standard color, but many other colors are available.

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Item #	Nominal Durometer	Color	Compound Features	RoHS Compliant	REACH Compliant

3526	N/A 50	N/A Yellow	N/A Internally Lubricated	N/A true	N/A true
3756	N/A 70	N/A Yellow	N/A	N/A true	N/A false
3656	N/A 60	N/A Yellow	N/A	N/A false	N/A false
3556	N/A 50	N/A Yellow	N/A Low Compression Set	N/A true	N/A true
5926	N/A 90	N/A Yellow	N/A	N/A false	N/A false
3575	N/A 50	N/A White	N/A FDA, 3-A	N/A true	N/A true
5925	N/A 95	N/A White	N/A	N/A false	N/A false
3925	N/A 90	N/A White	N/A FDA, 3-A	N/A false	N/A false
3675	N/A 60	N/A White	N/A FDA	N/A false	N/A false
3625	N/A 60	N/A White	N/A FDA, 3-A	N/A true	N/A true
3525	N/A 50	N/A White	N/A	N/A false	N/A false
3425	N/A 40	N/A White	N/A FDA	N/A true	N/A true
3725	N/A 70	N/A White	N/A FDA, 3-A	N/A false	N/A false
3834	N/A 80	N/A Teal	N/A	N/A true	N/A true
3734	N/A 70	N/A Teal	N/A	N/A false	N/A false
3724	N/A 70	N/A Tan	N/A FDA	N/A false	N/A false
3742	N/A 70	N/A Rust Red	N/A FDA	N/A false	N/A false
3642	N/A 60	N/A Rust Red	N/A	N/A false	N/A false
5942	N/A 90	N/A Red	N/A	N/A true	N/A true
5842	N/A 80	N/A Red	N/A	N/A false	N/A false
5742	N/A 70	N/A Red	N/A FDA	N/A false	N/A false
5542	N/A 55	N/A Red	N/A	N/A false	N/A true
5752	N/A 70	N/A Purple	N/A	N/A false	N/A false
5751	N/A 70	N/A Orange	N/A	N/A false	N/A false
5728	N/A 70	N/A Light Blue	N/A FDA	N/A false	N/A false
603401	N/A 40	N/A Green	N/A	N/A true	N/A true
3722	N/A 70	N/A Green	N/A	N/A false	N/A false
3623	N/A 60	N/A Green	N/A	N/A false	N/A false
3523	N/A 50	N/A Green	N/A Internally Lubricated	N/A true	N/A true
3726	N/A 70	N/A Gray	N/A FDA	N/A false	N/A false
3626	N/A 60	N/A Gray	N/A	N/A true	N/A true
3825	N/A 80	N/A Cream	N/A FDA, 3-A	N/A false	N/A false
3727	N/A 70	N/A Brown	N/A	N/A false	N/A false
7770	N/A 70	N/A Blue	N/A FDA, 3-A, Metal & X-ray Detectable	N/A true	N/A true
3962	N/A 90	N/A Blue	N/A	N/A false	N/A false
3862	N/A 80	N/A Blue	N/A	N/A true	N/A true
3762	N/A 70	N/A Blue	N/A	N/A false	N/A false
3628	N/A 60	N/A Blue	N/A	N/A false	N/A false
3562	N/A 50	N/A Blue	N/A	N/A true	N/A true
3500-03	N/A 50	N/A Blue	N/A	N/A true	N/A true
3420	N/A 40	N/A Black	N/A Peroxide Cured	N/A true	N/A true
7915	N/A 90	N/A Black	N/A SAE J515 Type CH	N/A true	N/A true
5916	N/A 90	N/A Black	N/A Low Temp	N/A true	N/A true
3451	N/A 40	N/A Black	N/A	N/A true	N/A true
5944	N/A 90	N/A Black	N/A FDA	N/A true	N/A true
5844	N/A 80	N/A Black	N/A FDA	N/A true	N/A true
3606	N/A 60	N/A Black	N/A	N/A true	N/A true
3441	N/A 40	N/A Black	N/A 3-A, FDA	N/A true	N/A true
3541	N/A 50	N/A Black	N/A FDA, 3-A	N/A true	N/A true
5715	N/A 70	N/A Black	N/A Ozone Resistant, Low Temp	N/A true	N/A true
603721	N/A 70	N/A Black	N/A Ultra Low Temperature	N/A true	N/A true
3758	N/A 70	N/A Black	N/A Internally Lubricated	N/A true	N/A true
3444	N/A 40	N/A Black	N/A FDA	N/A true	N/A true
7886	N/A 80	N/A Black	N/A Mil-G-1086 Type I	N/A true	N/A true
7880	N/A 80	N/A Black	N/A	N/A true	N/A true
7758	N/A 70	N/A Black	N/A Internally Lubricated	N/A true	N/A true
7728	N/A 70	N/A Black	N/A AMS 3228	N/A true	N/A true
7690	N/A 65	N/A Black	N/A Mil-Std-2190	N/A false	N/A false
7655	N/A 60	N/A Black	N/A Mil-R-6855 Class 1, Grade 60	N/A true	N/A true
7627	N/A 60	N/A Black	N/A AMS 3227	N/A true	N/A true
7605	N/A 60	N/A Black	N/A BS 3222 M	N/A false	N/A false
7601	N/A 60	N/A Black	N/A Ozone Resistant	N/A true	N/A true
7586	N/A 50	N/A Black	N/A Mil-G-1086 Type II	N/A true	N/A true
7555	N/A 50	N/A Black	N/A AMS-R-6855	N/A true	N/A true
7503	N/A 50	N/A Black	N/A	N/A true	N/A true
5939	N/A 90	N/A Black	N/A General Purpose	N/A true	N/A true
5903	N/A 95	N/A Black	N/A	N/A false	N/A false
5816	N/A 80	N/A Black	N/A Low Temperature	N/A true	N/A true
5805	N/A 80	N/A Black	N/A	N/A false	N/A false
5767	N/A 70	N/A Black	N/A Low Temperature	N/A true	N/A true
5757	N/A 70	N/A Black	N/A High Tensile	N/A true	N/A true
5748	N/A 75	N/A Black	N/A Oil Resistant	N/A true	N/A true
5738	N/A 70	N/A Black	N/A Teflon Filled	N/A true	N/A true
5718	N/A 70	N/A Black	N/A Teflon Filled	N/A true	N/A true
5716	N/A 70	N/A Black	N/A Low Temperature	N/A true	N/A true
5616	N/A 60	N/A Black	N/A Low Temperature	N/A true	N/A true
5606	N/A 60	N/A Black	N/A General Purpose, AMS 3200	N/A false	N/A false
5516	N/A 50	N/A Black	N/A Low Temperature	N/A true	N/A true
3944	N/A 90	N/A Black	N/A FDA	N/A false	N/A false
3920	N/A 90	N/A Black	N/A High Temperature	N/A true	N/A true
3919	N/A 90	N/A Black	N/A Graphite Filled	N/A true	N/A true
3918	N/A 90	N/A Black	N/A Teflon Filled, FDA	N/A true	N/A true
3917	N/A 90	N/A Black	N/A Moly Filled	N/A true	N/A true
3857	N/A 80	N/A Black	N/A Internally Lubricated	N/A false	N/A false
3847	N/A 80	N/A Black	N/A General Purpose, AMS 3213	N/A true	N/A true
3844	N/A 80	N/A Black	N/A FDA	N/A false	N/A false
3820	N/A 80	N/A Black	N/A High Temperature	N/A true	N/A true
3819	N/A 80	N/A Black	N/A Graphite Filled	N/A false	N/A false
3818	N/A 80	N/A Black	N/A Teflon Filled	N/A true	N/A true
3817	N/A 80	N/A Black	N/A Moly Filled	N/A true	N/A true
3800-01	N/A 80	N/A Black	N/A	N/A true	N/A true
3774	N/A 70	N/A Black	N/A AMS 7274	N/A false	N/A false
3772	N/A 70	N/A Black	N/A High Temperature, AMS 7272	N/A true	N/A true
3757	N/A 70	N/A Black	N/A Internally Lubricated	N/A true	N/A true
3741	N/A 70	N/A Black	N/A FDA, 3-A	N/A true	N/A true
3740	N/A 70	N/A Black	N/A Good Bond to Metals	N/A true	N/A true
3720	N/A 70	N/A Black	N/A High Temperature	N/A true	N/A true
3719	N/A 70	N/A Black	N/A Graphite Filled	N/A false	N/A false
3718	N/A 75	N/A Black	N/A Teflon Filled	N/A false	N/A false
3717	N/A 70	N/A Black	N/A Moly Filled	N/A true	N/A true
3716	N/A 70	N/A Black	N/A Very Low Temperature	N/A true	N/A true
3708	N/A 70	N/A Black	N/A Water Resistant	N/A true	N/A true
3644	N/A 65	N/A Black	N/A FDA	N/A true	N/A true
3641	N/A 60	N/A Black	N/A FDA	N/A true	N/A true
3620	N/A 60	N/A Black	N/A High Temperature	N/A true	N/A true
3619	N/A 60	N/A Black	N/A Graphite Filled	N/A false	N/A false
3618	N/A 60	N/A Black	N/A Teflon Filled	N/A false	N/A false
3617	N/A 60	N/A Black	N/A Moly Filled	N/A false	N/A false
3616	N/A 65	N/A Black	N/A Conductive	N/A false	N/A false
3558	N/A 50	N/A Black	N/A Internally Lubricated	N/A true	N/A true
3547	N/A 50	N/A Black	N/A Oil Resistant, Good Elongation	N/A false	N/A false
3544	N/A 50	N/A Black	N/A FDA	N/A false	N/A false
3520	N/A 50	N/A Black	N/A High Temperature	N/A true	N/A true
3518	N/A 50	N/A Black	N/A Teflon Filled	N/A false	N/A false
3517	N/A 50	N/A Black	N/A Moly Filled	N/A false	N/A false
3505	N/A 60	N/A Black	N/A Fuel Resistant	N/A false	N/A false
3500-11	N/A 50	N/A Black	N/A FDA	N/A false	N/A false
3447	N/A 40	N/A Black	N/A Oil Resistant, Good Elongation	N/A false	N/A false
3418	N/A 40	N/A Black	N/A Teflon Filled	N/A false	N/A false
3405	N/A 40	N/A Black	N/A General Purpose	N/A false	N/A false
3301	N/A 30	N/A Black	N/A General Purpose	N/A false	N/A false
7501	N/A 50	N/A Black	N/A Low Temp, General Purpose	N/A true	N/A true
3744	N/A 70	N/A Black	N/A FDA, Non-Crazing	N/A true	N/A true
5747	N/A 70	N/A Black	N/A UL Approved, General Purpose	N/A true	N/A true

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Nominal Durometer

Color

Compound Features

RoHS Compliant

REACH Compliant