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Technical Data Sheet
PartsTable / COMPONENT / BPF-1/4-4
BPF-1/4-4 ✓ 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 BPF-1/4-4 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 5340-01-198-8769, 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
BPF-1/4-4
NSN: 5340-01-198-8769
FSC: 5340
CAGE: 1GX03 — LINMARR ASSOCIATES, INC. DBA LINMARR ASSOCIATES INC (USA)
SPECIFICATIONS
Part NumberBPF-1/4-4
NSN5340-01-198-8769
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BPF-1/4-4 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
•
DESIGN TYPE: FRICTION
•
FEATURES PROVIDED: BEVELED SEAT AND SHOULDER
•
MATERIAL: PLASTIC
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPEFRICTION
FEATURES PROVIDEDBEVELED SEAT AND SHOULDER
MATERIALPLASTIC
OVERALL DIAMETER0.500 INCHES NOMINAL IN
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
GGG-P-781Interchangeable
interchangeable cross-reference
interchangeable
71-686Interchangeable
interchangeable cross-reference
interchangeable
8052Interchangeable
interchangeable cross-reference
interchangeable
KS12Interchangeable
interchangeable cross-reference
interchangeable
5523309Interchangeable
interchangeable cross-reference
interchangeable
6010258-008Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BPF-1/4-4?
BPF-1/4-4 is a BPF-1/4-4.
What parts can replace BPF-1/4-4?
There are 18 known substitutes for BPF-1/4-4: GGG-P-781, 71-686, 8052 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BPF-1/4-4?
BPF-1/4-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-198-8769. 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