Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW
The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, hardness_rating: 65.0 SHORE DUROMETER A NOMINAL, outside_diameter: 3.770 INCHES NOMINAL IN, center_hole_diameter: 3.335 INCHES MINIMUM AND 3.365 INCHES MAXIMUM IN, elongation_percentage: 200 MAXIMUM, cross-sectional_height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-251-9373, indicating validated use in U.S.
government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.
WHERE IT FITS
MS9021-340
NSN:5331-00-251-9373 FSC:5331 — O-RING CAGE:96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
material
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
hardness_rating
65.0 SHORE DUROMETER A NOMINAL
outside_diameter
3.770 INCHES NOMINAL IN
center_hole_diameter
3.335 INCHES MINIMUM AND 3.365 INCHES MAXIMUM IN
elongation_percentage
200 MAXIMUM
cross-sectional_height
0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
NSN
5331-00-251-9373
COMPONENT DIAGRAM
KEY FEATURES
•
OUTSIDE DIAMETER: 3.736 INCHES MINIMUM AND 3.804 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CENTER HOLE DIAMETER: 3.335 INCHES MINIMUM AND 3.365 INCHES MAXIMUM IN
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FREQUENTLY ASKED QUESTIONS
What is MS9021-340?
MS9021-340 is a O-RING.
What parts can replace MS9021-340?
There are 20 known substitutes for MS9021-340: SAE-AS3578, MS9021-340, AS3578-340 and 17 more. Substitute compatibility should be verified for your specific system.
Is MS9021-340 still available?
MS9021-340 is currently cancelled.
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