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Technical Data Sheet
PartsTable / COMPONENT / B77 3-8X7-16
B77 3-8X7-16 ✓ 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 PACKING,PREFORMED is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-599-2391, 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
B77 3-8X7-16
NSN: 5330-00-599-2391
FSC: 5330
CAGE: 85265 — DURAMETALLIC CORP (USA)
SPECIFICATIONS
Part NumberB77 3-8X7-16
NSN5330-00-599-2391
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B77 3-8X7-16 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 10
B77Interchangeable
interchangeable cross-reference
interchangeable
19362A1Interchangeable
interchangeable cross-reference
interchangeable
SR313Interchangeable
interchangeable cross-reference
interchangeable
40416Interchangeable
interchangeable cross-reference
interchangeable
111PC3Interchangeable
interchangeable cross-reference
interchangeable
B77.0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B77 3-8X7-16?
B77 3-8X7-16 is a PACKING,PREFORMED.
What parts can replace B77 3-8X7-16?
There are 10 known substitutes for B77 3-8X7-16: B77, 19362A1, SR313 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B77 3-8X7-16?
B77 3-8X7-16 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-599-2391. 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