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91280A644 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91280A644: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 6.4 MILLIMETERS NOMINAL MM, thread_length: 26.0 MILLIMETERS MINIMUM AND 33.5 MILLIMETERS MAXIMUM MM, fastener_length: 60.0 MILLIMETERS NOMINAL MM, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-558-9873, 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
91280A644
NSN: 5305-01-558-9873
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height6.4 MILLIMETERS NOMINAL MM
thread_length26.0 MILLIMETERS MINIMUM AND 33.5 MILLIMETERS MAXIMUM MM
fastener_length60.0 MILLIMETERS NOMINAL MM
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_between_flats17.0 MILLIMETERS NOMINAL MM
end_item_identification2355-01-542-7908 INTERIM VEHICLE MIN
NSN5305-01-558-9873
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91280A644 · 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
•
HEAD HEIGHT: 6.4 MILLIMETERS NOMINAL MM
•
FASTENER LENGTH: 60.0 MILLIMETERS NOMINAL MM
•
THREAD LENGTH: 26.0 MILLIMETERS MINIMUM AND 33.5 MILLIMETERS MAXIMUM MM
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 17.0 MILLIMETERS NOMINAL MM
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT6.4 MILLIMETERS NOMINAL MM
FASTENER LENGTH60.0 MILLIMETERS NOMINAL MM
THREAD LENGTH26.0 MILLIMETERS MINIMUM AND 33.5 MILLIMETERS MAXIMUM MM
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS17.0 MILLIMETERS NOMINAL MM
SURFACE TREATMENTZINC OVERALL
END ITEM IDENTIFICATION2355-01-542-7908 INTERIM VEHICLE MIN
MATERIALSTEEL OVERALL
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91280A644?
91280A644 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 91280A644?
91280A644 is cataloged in the U.S. Government catalog under NSN 5305-01-558-9873. 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.