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PartsTable / COMPONENT / 845-4687407-257 1.000IN SCREW
845-4687407-257 1.000IN SCREW ✓ 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 845-4687407-257 1.000IN SCREW 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 5305-01-321-6226, 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
845-4687407-257 1.000IN SCREW
NSN: 5305-01-321-6226
FSC: 5305
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part Number845-4687407-257 1.000IN SCREW
NSN5305-01-321-6226
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 845-4687407-257 1.000IN SCREW · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
FASTENER LENGTH: 1.000 INCHES NOMINAL IN
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
INTERNAL DRIVE STYLE: SLOT
•
HEAD DIAMETER: 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 20
•
THREAD CLASS: 3A A
•
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
FASTENER LENGTH1.000 INCHES NOMINAL IN
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLESLOT
HEAD DIAMETER0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH20
THREAD CLASS3A A
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
SCREW MATERIALNICKEL ALLOY 400
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
1/4 20UNC 3A X 1 IN LGInterchangeable
interchangeable cross-reference
interchangeable
FF-S-86 TYPE IVInterchangeable
interchangeable cross-reference
interchangeable
FF-S-86Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 845-4687407-257 1.000IN SCREW?
845-4687407-257 1.000IN SCREW is a 845-4687407-257 1.000IN SCREW.
What parts can replace 845-4687407-257 1.000IN SCREW?
There are 4 known substitutes for 845-4687407-257 1.000IN SCREW: 1/4 20UNC 3A X 1 IN LG, FF-S-86 TYPE IV, FF-S-86 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 845-4687407-257 1.000IN SCREW?
845-4687407-257 1.000IN SCREW is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-321-6226. 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