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SP64543 ✓ 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 ASSIST ASSY,FORWARD is a the manufacturer industrial component. Key specifications include end_item_identification: COLT M16A2 AND M16A3 WEAPONS; 5.56MM RIFLES, CARBINES, COMMANDOS AND LIGHT MACHINE GUNS; 9MM SUBMACHINE GUNS MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-576-9308, 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
SP64543
NSN: 5330-00-576-9308
FSC: 5330
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
end_item_identificationCOLT M16A2 AND M16A3 WEAPONS; 5.56MM RIFLES, CARBINES, COMMANDOS AND LIGHT MACHINE GUNS; 9MM SUBMACHINE GUNS MM
NSN5330-00-576-9308
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SP64543 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
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR
•
CROSS SECTION OUTSIDE DIAMETER: 0.093 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND A GRADE AND 4 CLASS
•
MATERIAL: ASBESTOS
•
FABRICATION METHOD: TWISTED
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLECIRCULAR
CROSS SECTION OUTSIDE DIAMETER0.093 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA3 TYPE AND A GRADE AND 4 CLASS
MATERIALASBESTOS
FABRICATION METHODTWISTED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
SP64542Interchangeable
interchangeable cross-reference
interchangeable
28G7Interchangeable
interchangeable cross-reference
interchangeable
MILP16404Interchangeable
interchangeable cross-reference
interchangeable
SP64541Interchangeable
interchangeable cross-reference
interchangeable
SP 64543Interchangeable
interchangeable cross-reference
interchangeable
64543Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SP64543?
SP64543 is a ASSIST ASSY,FORWARD.
What parts can replace SP64543?
There are 6 known substitutes for SP64543: SP64542, 28G7, MILP16404 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SP64543?
SP64543 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-576-9308. 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