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R978800400 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

R978800400: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-01-299-8238, 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
R978800400
NSN: 5331-01-299-8238
FSC: 5331 — O-ring
CAGE: 27005 — BOSCH REXROTH CORPORATION DIV INDUSTRIAL HYDRAULICS (USA)
SPECIFICATIONS
Part NumberR978800400
NSN5331-01-299-8238
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R978800400 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
SUBSTITUTES & CROSS-REFERENCES 3
18,72X2,62NBR90Reference document
Same NSN cross-reference
Reference document — Secondary reference
083758Reference document
Same NSN cross-reference
Reference document — Secondary reference
882307Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R978800400?
R978800400 is a O-RING.
What parts can replace R978800400?
There are 3 known substitutes for R978800400: 18,72X2,62NBR90, 083758, 882307. Substitute compatibility should be verified for your specific system.
What is the NSN for R978800400?
R978800400 is cataloged in the U.S. Government catalog under NSN 5331-01-299-8238. This indicates validated use in U.S. government and defense supply chains.
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