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, peripheral_diameter: 12.262 INCHES NOMINAL IN, center_hole_diameter: 11.918 INCHES MINIMUM AND 12.050 INCHES MAXIMUM IN, elongation_percentage: 200 MAXIMUM, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-6518, 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
MS9021-278
NSN:5331-00-579-6518 FSC:5331 — O-RING CAGE:F0229 — LE JOINT FRANCAIS (FRA)
SPECIFICATIONS
material
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
hardness_rating
65.0 SHORE DUROMETER A NOMINAL
peripheral_diameter
12.262 INCHES NOMINAL IN
center_hole_diameter
11.918 INCHES MINIMUM AND 12.050 INCHES MAXIMUM IN
elongation_percentage
200 MAXIMUM
cross-sectional_height
0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
departure_from_cited_document
MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
criticality_code_justification
ZZZW
NSN
5331-00-579-6518
COMPONENT DIAGRAM
KEY FEATURES
•
CENTER HOLE DIAMETER: 11.954 INCHES MINIMUM AND 12.014 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
HARDNESS RATING: 65.0 SHORE DUROMETER A NOMINAL
•
OUTSIDE DIAMETER: 12.189 INCHES MINIMUM AND 12.335 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
TEMP RATING: -70.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER
11.954 INCHES MINIMUM AND 12.014 INCHES MAXIMUM IN
MATERIAL
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
HARDNESS RATING
65.0 SHORE DUROMETER A NOMINAL
OUTSIDE DIAMETER
12.189 INCHES MINIMUM AND 12.335 INCHES MAXIMUM IN
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FREQUENTLY ASKED QUESTIONS
What is MS9021-278?
MS9021-278 is a O-RING.
What parts can replace MS9021-278?
There are 23 known substitutes for MS9021-278: G22-78, 22-78, 9448731030 and 20 more. Substitute compatibility should be verified for your specific system.
Is MS9021-278 still available?
MS9021-278 is currently cancelled.
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