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91251A345 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91251A345: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: CHAMFER FLANGE, head_height: 0.190 INCHES MINIMUM IN, thread_class: 3A A, thread_length: 0.750 INCHES MINIMUM IN, fastener_length: 0.940 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-537-0631, 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
91251A345
NSN: 5305-01-537-0631
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleCHAMFER FLANGE
head_height0.190 INCHES MINIMUM IN
thread_class3A A
thread_length0.750 INCHES MINIMUM IN
fastener_length0.940 INCHES MINIMUM IN
thread_directionRIGHT-HAND
width_across_flats0.156 INCHES MINIMUM IN
width_between_flats0.312 INCHES MINIMUM IN
internal_drive_styleHEXAGON
end_item_identificationMRAP - COUGAR TOW
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-537-0631
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91251A345 · 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
•
WIDTH ACROSS FLATS: 0.156 INCHES MINIMUM IN
•
HEAD HEIGHT: 0.190 INCHES MINIMUM IN
•
FASTENER LENGTH: 0.940 INCHES MINIMUM IN
•
THREAD LENGTH: 0.750 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: CHAMFER FLANGE
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.312 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES MINIMUM IN
HEAD HEIGHT0.190 INCHES MINIMUM IN
FASTENER LENGTH0.940 INCHES MINIMUM IN
THREAD LENGTH0.750 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLECHAMFER FLANGE
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.312 INCHES MINIMUM IN
INTERNAL DRIVE STYLEHEXAGON
THREAD CLASS3A A
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91251A345?
91251A345 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for 91251A345?
91251A345 is cataloged in the U.S. Government catalog under NSN 5305-01-537-0631. 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.