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PartsTable / COMPONENT / 51-156PC235
51-156PC235 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-STYRENE CLASS SBR OVERALL, material_document_and_classification: MIL-R-21252 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL, reference_number_differentiating_characteristics: AS DIFFERENTIATED BY THE MATERIAL REQUIREMENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-378-1968, 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
51-156PC235
NSN: 5330-00-378-1968
FSC: 5330
CAGE: 70876 — BATH IRON WORKS CORPORATION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
material_document_and_classificationMIL-R-21252 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
reference_number_differentiating_characteristicsAS DIFFERENTIATED BY THE MATERIAL REQUIREMENT
NSN5330-00-378-1968
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 51-156PC235 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
•
LARGEST BOLT HOLE DIAMETER: 0.563 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
MATERIAL: ASBESTOS OVERALL
•
SMALLEST BOLT HOLE DIAMETER: 0.437 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
LARGEST BOLT HOLE DIAMETER0.563 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
MATERIALASBESTOS OVERALL
OVERALL LENGTH14.500 INCHES NOMINAL IN
OVERALL WIDTH12.563 INCHES NOMINAL IN
SMALLEST BOLT HOLE DIAMETER0.437 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
300995Interchangeable
interchangeable cross-reference
interchangeable
GT40Interchangeable
interchangeable cross-reference
interchangeable
51-156PC235Interchangeable
interchangeable cross-reference
interchangeable
4600124000Interchangeable
interchangeable cross-reference
interchangeable
M37600-3PC235Interchangeable
interchangeable cross-reference
interchangeable
36886PC235Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51-156PC235?
51-156PC235 is a GASKET.
What parts can replace 51-156PC235?
There are 12 known substitutes for 51-156PC235: 300995, GT40, 51-156PC235 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51-156PC235?
51-156PC235 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-378-1968. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026