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, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, hardness_rating: 90.0 SHORE DUROMETER A NOMINAL, peripheral_diameter: 1.156 INCHES NOMINAL IN, center_hole_diameter: 0.918 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN, elongation_percentage: 80 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-251-8839, 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
MS28778-12
NSN:5331-00-251-8839 FSC:5331 — O-RING CAGE:A0126 — LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE (ITA)
SPECIFICATIONS
material
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating
-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
hardness_rating
90.0 SHORE DUROMETER A NOMINAL
peripheral_diameter
1.156 INCHES NOMINAL IN
center_hole_diameter
0.918 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
elongation_percentage
80 MAXIMUM
cross-sectional_height
0.112 INCHES MINIMUM AND 0.120 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
5331-00-251-8839
COMPONENT DIAGRAM
KEY FEATURES
•
CENTER HOLE DIAMETER: 0.918 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-5510 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
HARDNESS RATING: 90.0 SHORE DUROMETER A NOMINAL
•
CROSS-SECTIONAL HEIGHT: 0.112 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.139 INCHES MINIMUM AND 1.173 INCHES MAXIMUM IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
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FREQUENTLY ASKED QUESTIONS
What is MS28778-12?
MS28778-12 is a O-RING.
What parts can replace MS28778-12?
There are 31 known substitutes for MS28778-12: 2528918, MILP5510, AMS-P-5510 and 28 more. Substitute compatibility should be verified for your specific system.
Is MS28778-12 still available?
MS28778-12 is currently cancelled.
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