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139C7971-2 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

139C7971-2: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: NICKEL OVERALL, overall_width: 2.125 INCHES NOMINAL IN, overall_length: 2.540 INCHES NOMINAL IN, special_features: BOND GASKET TO COVER W/ADHESIVE, style_designator: NON-CIRCULAR, cross-sectional_height: 0.063 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-056-9221, 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
139C7971-2
NSN: 5330-01-056-9221
FSC: 5330 — Packing and Gasket Materials
CAGE: 05606 — GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS (USA)
SPECIFICATIONS
materialNICKEL OVERALL
overall_width2.125 INCHES NOMINAL IN
overall_length2.540 INCHES NOMINAL IN
special_featuresBOND GASKET TO COVER W/ADHESIVE
style_designatorNON-CIRCULAR
cross-sectional_height0.063 INCHES NOMINAL IN
end_item_identificationARMAMENT SUBSYSTEM,XM97E1
cross-sectional_shape_styleEMI
NSN5330-01-056-9221
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 139C7971-2 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
•
CROSS-SECTIONAL HEIGHT: 0.063 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: EMI
•
MATERIAL: NICKEL OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.063 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
OVERALL LENGTH2.540 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEEMI
OVERALL WIDTH2.125 INCHES NOMINAL IN
SPECIAL FEATURESBOND GASKET TO COVER W/ADHESIVE
END ITEM IDENTIFICATIONARMAMENT SUBSYSTEM,XM97E1
MATERIALNICKEL OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 139C7971-2?
139C7971-2 is a GASKET.
What is the NSN for 139C7971-2?
139C7971-2 is cataloged in the U.S. Government catalog under NSN 5330-01-056-9221. 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.