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91251A621 — SCREW,MACHINE UNIT

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91251A621: SCREW,MACHINE UNIT.

The SCREW,MACHINE UNIT is a the manufacturer industrial component. Key specifications include end_item_identification: SPECIAL AIRCRAFT AND ENGINE TOOL AND SUPPORT EQUIPMENT, criticality_code_justification: AGAV. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-692-4653, 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
91251A621
NSN: 5305-01-692-4653
FSC: 5305 — Screws
CAGE: 3GWU8 — ADVANCED TORQUE PRODUCTS, LLC (USA)
SPECIFICATIONS
end_item_identificationSPECIAL AIRCRAFT AND ENGINE TOOL AND SUPPORT EQUIPMENT
criticality_code_justificationAGAV
NSN5305-01-692-4653
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91251A621 · 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: AGAV
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONAGAV
END ITEM IDENTIFICATIONSPECIAL AIRCRAFT AND ENGINE TOOL AND SUPPORT EQUIPMENT
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91251A621?
91251A621 is a SCREW,MACHINE UNIT.
What is the NSN for 91251A621?
91251A621 is cataloged in the U.S. Government catalog under NSN 5305-01-692-4653. 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.