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Technical Data Sheet
121860 ✓ 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 DIFFERENTIAL GEAR UNIT is a the manufacturer industrial component. Key specifications include special_features: COMMONLY USED TO PROTECT AIR BRAKE RESERVOIRS FROM BEING DEPLETED BY THE FAILURE OF OTHER AIR ACCESSORY ITEMS., supplementary_features: PORT SIZE(NPT)INLET AND OUTLET 0.250 INCH; NOMINAL CLOSING PRESSURE: 70 PSI IN, part_name_assigned_by_controlling_agency: PRESSURE PROTECTION VALVE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-418-6795, 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
121860
NSN: 5330-00-418-6795
FSC: 5330
CAGE: 81495 — KOEHRING CRANES, INC DBA TEREX CRANES DIV WAVERLY OPERATIONS (USA)
SPECIFICATIONS
special_featuresCOMMONLY USED TO PROTECT AIR BRAKE RESERVOIRS FROM BEING DEPLETED BY THE FAILURE OF OTHER AIR ACCESSORY ITEMS.
supplementary_featuresPORT SIZE(NPT)INLET AND OUTLET 0.250 INCH; NOMINAL CLOSING PRESSURE: 70 PSI IN
part_name_assigned_by_controlling_agencyPRESSURE PROTECTION VALVE
NSN5330-00-418-6795
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 121860 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
121860Interchangeable
interchangeable cross-reference
interchangeable
140380Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121860?
121860 is a DIFFERENTIAL GEAR UNIT.
What parts can replace 121860?
There are 2 known substitutes for 121860: 121860, 140380. Substitute compatibility should be verified for your specific system.
What is the NSN for 121860?
121860 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-418-6795. This indicates validated use in U.S. government and defense supply chains.
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