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376851 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

376851: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, case_style: RECESSED, seal_width: 0.523 INCHES MINIMUM AND 0.555 INCHES MAXIMUM IN, housing_bore_diameter: 3.078 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 2.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-086-3503, 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
376851
NSN: 5330-01-086-3503
FSC: 5330 — Packing and Gasket Materials
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
case_styleRECESSED
seal_width0.523 INCHES MINIMUM AND 0.555 INCHES MAXIMUM IN
housing_bore_diameter3.078 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter2.250 INCHES NOMINAL IN
NSN5330-01-086-3503
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 376851 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
•
SEAL WIDTH: 0.523 INCHES MINIMUM AND 0.555 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 3.078 INCHES NOMINAL IN
•
CASE STYLE: RECESSED
•
ACCOMMODATED SHAFT DIAMETER: 2.250 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.523 INCHES MINIMUM AND 0.555 INCHES MAXIMUM IN
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER3.078 INCHES NOMINAL IN
CASE STYLERECESSED
ACCOMMODATED SHAFT DIAMETER2.250 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
38128Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 376851?
376851 is a SEAL,PLAIN ENCASED.
What parts can replace 376851?
There is 1 known substitute for 376851: 38128. Substitute compatibility should be verified for your specific system.
What is the NSN for 376851?
376851 is cataloged in the U.S. Government catalog under NSN 5330-01-086-3503. 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.