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Technical Data Sheet
PartsTable / O-RING / 1BV-3701
1BV-3701 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: ASBESTOS OVERALL, special_features: O.D. 1.000 INCH; I.D.

0.531 INCH; 0.250 INCH THICK IN, criticality_code_justification: ZZZY, material_document_and_classification: MIL-P-17303,CLASS 2,TYPE E,SYMBOL 1111 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-137-5021, 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
1BV-3701
NSN: 5331-01-137-5021
FSC: 5331 — O-RING
CAGE: 57574 — VELAN VALVE CORP. (USA)
SPECIFICATIONS
materialASBESTOS OVERALL
special_featuresO.D. 1.000 INCH; I.D. 0.531 INCH; 0.250 INCH THICK IN
criticality_code_justificationZZZY
material_document_and_classificationMIL-P-17303,CLASS 2,TYPE E,SYMBOL 1111 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN5331-01-137-5021
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1BV-3701 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
86740PC12Interchangeable
interchangeable cross-reference
interchangeable
187I-1/4IN LBInterchangeable
interchangeable cross-reference
interchangeable
C80009Interchangeable
interchangeable cross-reference
interchangeable
33310-3PC8,0.50INInterchangeable
interchangeable cross-reference
interchangeable
33311-3 PIECE 8 3/4 INInterchangeable
interchangeable cross-reference
interchangeable
4BV-3701Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1BV-3701?
1BV-3701 is a O-RING.
What parts can replace 1BV-3701?
There are 7 known substitutes for 1BV-3701: 86740PC12, 187I-1/4IN LB, C80009 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1BV-3701?
1BV-3701 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-137-5021. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026