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21340 ITEM 18 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21340 ITEM 18: O-RING.

The O-RING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5331-01-387-9322, 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
21340 ITEM 18
NSN: 5331-01-387-9322
FSC: 5331 — O-ring
CAGE: 06550 — INGERSOLL-RAND CO MATERIAL HANDLING DIV (USA)
SPECIFICATIONS
Part Number21340 ITEM 18
NSN5331-01-387-9322
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21340 ITEM 18 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 1
54341Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21340 ITEM 18?
21340 ITEM 18 is a O-RING.
What parts can replace 21340 ITEM 18?
There is 1 known substitute for 21340 ITEM 18: 54341. Substitute compatibility should be verified for your specific system.
What is the NSN for 21340 ITEM 18?
21340 ITEM 18 is cataloged in the U.S. Government catalog under NSN 5331-01-387-9322. This indicates validated use in U.S. government and defense supply chains.
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