PartsTable
Technical Data Sheet
BB9645 ✓ 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 SPRING PISTON 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 5340-00-700-0628, 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
BB9645
NSN: 5340-00-700-0628
FSC: 5340
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
Part NumberBB9645
NSN5340-00-700-0628
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BB9645 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 11
371-10Interchangeable
interchangeable cross-reference
interchangeable
X-2Interchangeable
interchangeable cross-reference
interchangeable
311-472Interchangeable
interchangeable cross-reference
interchangeable
311-0472-00Interchangeable
interchangeable cross-reference
interchangeable
37010Interchangeable
interchangeable cross-reference
interchangeable
37110X01-001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB9645?
BB9645 is a SPRING PISTON.
What parts can replace BB9645?
There are 11 known substitutes for BB9645: 371-10, X-2, 311-472 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BB9645?
BB9645 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-700-0628. This indicates validated use in U.S. government and defense supply chains.
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