PartsTable
Technical Data Sheet
2HS556 ✓ 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 end_item_identification: MRAP - COMMON NSN - USED ON MRAP NO PERMANENT WSDC IDENTIFIED AND 16 OTHER WEAPON SYSTEMS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-155-4277, 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
2HS556
NSN: 5331-01-155-4277
FSC: 5331 — O-RING
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
end_item_identificationMRAP - COMMON NSN - USED ON MRAP NO PERMANENT WSDC IDENTIFIED AND 16 OTHER WEAPON SYSTEMS
NSN5331-01-155-4277
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2HS556 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
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONMRAP - COMMON NSN - USED ON MRAP NO PERMANENT WSDC IDENTIFIED AND 16 OTHER WEAPON SYSTEMS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
4002-6Interchangeable
interchangeable cross-reference
interchangeable
CC50CH6R0CInterchangeable
interchangeable cross-reference
interchangeable
CC50CH060GInterchangeable
interchangeable cross-reference
interchangeable
5331PL1263812Interchangeable
Same NIIN cross-reference
interchangeable
22617-4Interchangeable
Same NIIN cross-reference
interchangeable
853181952Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2HS556?
2HS556 is a O-RING.
What parts can replace 2HS556?
There are 6 known substitutes for 2HS556: 4002-6, CC50CH6R0C, CC50CH060G and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2HS556?
2HS556 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-155-4277. This indicates validated use in U.S. government and defense supply chains.
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