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Technical Data Sheet
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BP 8521 — CLAMP,SYNCHRO

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

BP 8521: CLAMP,SYNCHRO.

The CLAMP,SYNCHRO is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5340-00-128-6291, 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
BP 8521
NSN: 5340-00-128-6291
FSC: 5340 — Hardware, Commercial
CAGE: 27361 — BURKE PRODUCTS INC (USA)
SPECIFICATIONS
Part NumberBP 8521
NSN5340-00-128-6291
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BP 8521 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
SUBSTITUTES & CROSS-REFERENCES 3
MS17183Reference document
Same NSN cross-reference
Reference document — Identification reference
MS17183-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS171183-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BP 8521?
BP 8521 is a CLAMP,SYNCHRO.
What parts can replace BP 8521?
There are 3 known substitutes for BP 8521: MS17183, MS17183-4, MS171183-4. Substitute compatibility should be verified for your specific system.
What is the NSN for BP 8521?
BP 8521 is cataloged in the U.S. Government catalog under NSN 5340-00-128-6291. This indicates validated use in U.S. government and defense supply chains.
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