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: 10.762 INCHES NOMINAL IN, elongation_percentage: 200 MAXIMUM, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN, criticality_code_justification: ZZZY. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-542-1981, 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
MS9021-275
NSN:5331-00-542-1981 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
10.762 INCHES NOMINAL IN
elongation_percentage
200 MAXIMUM
cross-sectional_height
0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
criticality_code_justification
ZZZY
reference_number_differentiating_characteristics
CLEANED IN ACCORDANCE WITH MIL-C-52211
NSN
5331-00-542-1981
COMPONENT DIAGRAM
KEY FEATURES
•
OUTSIDE DIAMETER: 10.699 INCHES MINIMUM AND 10.825 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
HARDNESS RATING: 65.0 SHORE DUROMETER A NOMINAL
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 10.454 INCHES MINIMUM AND 10.514 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER
10.699 INCHES MINIMUM AND 10.825 INCHES MAXIMUM IN
MATERIAL
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
HARDNESS RATING
65.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT
0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
CENTER HOLE DIAMETER
10.454 INCHES MINIMUM AND 10.514 INCHES MAXIMUM IN
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FREQUENTLY ASKED QUESTIONS
What is MS9021-275?
MS9021-275 is a O-RING.
What parts can replace MS9021-275?
There are 20 known substitutes for MS9021-275: 2-03154, AS3578-278, 5331PL1279487 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS9021-275?
MS9021-275 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-542-1981. This indicates validated use in U.S. government and defense supply chains.
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