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Technical Data Sheet
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21212541-631 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

21212541-631: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include end_item_identification: WINCH LUFFING CRANE, part_name_assigned_by_controlling_agency: NAVY SPECIAL PROJECT. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-536-0065, 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
21212541-631
NSN: 5305-01-536-0065
FSC: 5305 — Screws
CAGE: S8829 — CARGOTEC SWEDEN AB - MACGREGOR CRANES (SWE)
SPECIFICATIONS
end_item_identificationWINCH LUFFING CRANE
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5305-01-536-0065
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21212541-631 · 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
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
END ITEM IDENTIFICATIONWINCH LUFFING CRANE
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21212541-631?
21212541-631 is a SCREW,MACHINE.
What is the NSN for 21212541-631?
21212541-631 is cataloged in the U.S. Government catalog under NSN 5305-01-536-0065. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.