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6931021-16 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6931021-16: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER, special_features: ITEM IS RUBBER INSERT 12 IN. LONG, DUROMETER GR 60 IN, end_item_identification: USED ON SSN 21, SSN 688, CYLINDER AND TUBING WELDMENT.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-485-7189, 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
6931021-16
NSN: 5340-01-485-7189
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialRUBBER
special_featuresITEM IS RUBBER INSERT 12 IN. LONG, DUROMETER GR 60 IN
end_item_identificationUSED ON SSN 21, SSN 688, CYLINDER AND TUBING WELDMENT
NSN5340-01-485-7189
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6931021-16 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
•
COLOR: BLACK
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
COLORBLACK
SPECIAL FEATURESITEM IS RUBBER INSERT 12 IN. LONG, DUROMETER GR 60 IN
END ITEM IDENTIFICATIONUSED ON SSN 21, SSN 688, CYLINDER AND TUBING WELDMENT
MATERIALRUBBER
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
6931021 ITEM NO. 16Same 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 6931021-16?
6931021-16 is a BUMPER.
What parts can replace 6931021-16?
There is 1 known substitute for 6931021-16: 6931021 ITEM NO. 16. Substitute compatibility should be verified for your specific system.
What is the NSN for 6931021-16?
6931021-16 is cataloged in the U.S. Government catalog under NSN 5340-01-485-7189. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.