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2031378 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2031378: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, peripheral_diameter: 4.688 INCHES NOMINAL IN, center_hole_diameter: 3.632 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN, cross-sectional_height: 0.375 INCHES NOMINAL IN, cross-sectional_thickness: 0.094 INCHES NOMINAL IN, cross-sectional_shape_style: FLANGE. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-616-7771, 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
2031378
NSN: 5330-00-616-7771
FSC: 5330 — Packing and Gasket Materials
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
peripheral_diameter4.688 INCHES NOMINAL IN
center_hole_diameter3.632 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
cross-sectional_height0.375 INCHES NOMINAL IN
cross-sectional_thickness0.094 INCHES NOMINAL IN
cross-sectional_shape_styleFLANGE
NSN5330-00-616-7771
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2031378 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 THICKNESS: 0.094 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.375 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: FLANGE
•
PERIPHERAL DIAMETER: 4.688 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 3.632 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.094 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.375 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLANGE
PERIPHERAL DIAMETER4.688 INCHES NOMINAL IN
CENTER HOLE DIAMETER3.632 INCHES MINIMUM AND 3.635 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
JT10622Reference document
Same NSN cross-reference
Reference document — Secondary reference
667391Reference document
Same NSN cross-reference
Reference document — Secondary reference
353034Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2031378?
2031378 is a RETAINER,PACKING.
What parts can replace 2031378?
There are 3 known substitutes for 2031378: JT10622, 667391, 353034. Substitute compatibility should be verified for your specific system.
What is the NSN for 2031378?
2031378 is cataloged in the U.S. Government catalog under NSN 5330-00-616-7771. 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.