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320-6640876FNAY-10-18 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5305-01-419-0830, 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
320-6640876FNAY-10-18
NSN: 5305-01-419-0830
FSC: 5305
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
departure_from_cited_documentMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HD QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
criticality_code_justificationZZZW
NSN5305-01-419-0830
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 320-6640876FNAY-10-18 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HD QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZW
DEPARTURE FROM CITED DOCUMENTMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HD QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
MS15957-79InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
0717688InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
23106InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
0.250-20UNC-2A X 0.500 316 CRESInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS51957-79S316InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS51957-79InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 320-6640876FNAY-10-18?
320-6640876FNAY-10-18 is a SCREW,MACHINE.
What parts can replace 320-6640876FNAY-10-18?
There are 7 known substitutes for 320-6640876FNAY-10-18: MS15957-79, 0717688, 23106 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 320-6640876FNAY-10-18?
320-6640876FNAY-10-18 is cataloged in the Federal Logistics Information System under NSN 5305-01-419-0830. This indicates validated use in U.S. government and defense supply chains.
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Last verified: September 2026