PartsTable
Technical Data Sheet
PartsTable / O-RING / 287-1122P8
287-1122P8 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
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 180.0 FAHRENHEIT DEGF, hardness_rating: 90.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.139 INCHES MINIMUM AND 1.173 INCHES MAXIMUM IN, center_hole_diameter: 0.918 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN, cross-sectional_height: 0.112 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN. 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
287-1122P8
NSN: 5331-00-251-8839
FSC: 5331 — O-RING
CAGE: 99687 — RAYTHEON CO EQUIPMENT DEVELOPMENT LAB (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
hardness_rating90.0 SHORE DUROMETER A NOMINAL
outside_diameter1.139 INCHES MINIMUM AND 1.173 INCHES MAXIMUM IN
center_hole_diameter0.918 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
cross-sectional_height0.112 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE; ARMORED MULTI-PURPOSE VEHICLE (AMPV).
material_document_and_classificationMIL-P-5510 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-00-251-8839
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 287-1122P8 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
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
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.918 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-5510 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE; ARMORED MULTI-PURPOSE VEHICLE (AMPV).
HARDNESS RATING90.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.112 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.139 INCHES MINIMUM AND 1.173 INCHES MAXIMUM IN
TEMP RATING-65.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
2528918Interchangeable
interchangeable cross-reference
interchangeable
MILP5510Interchangeable
interchangeable cross-reference
interchangeable
AMS-P-5510Interchangeable
interchangeable cross-reference
interchangeable
3383Interchangeable
interchangeable cross-reference
interchangeable
211618Interchangeable
interchangeable cross-reference
interchangeable
55-0382-4715CSInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 287-1122P8?
287-1122P8 is a O-RING.
What parts can replace 287-1122P8?
There are 31 known substitutes for 287-1122P8: 2528918, MILP5510, AMS-P-5510 and 28 more. Substitute compatibility should be verified for your specific system.
Is 287-1122P8 still available?
287-1122P8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026