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91251A304 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91251A304: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_diameter: 1.125 INCHES NOMINAL IN, fastener_length: 5.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, surface_treatment: OXIDE FILM OVERALL, end_item_identification: KC-46A SE A. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-657-9162, 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
91251A304
NSN: 5305-01-657-9162
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_diameter1.125 INCHES NOMINAL IN
fastener_length5.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentOXIDE FILM OVERALL
end_item_identificationKC-46A SE A
part_name_assigned_by_controlling_agencySCREW,CAP,SOCKET HE
NSN5305-01-657-9162
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91251A304 · 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
•
FASTENER LENGTH: 5.750 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: OXIDE FILM OVERALL
•
MATERIAL: STEEL OVERALL
•
HEAD DIAMETER: 1.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FASTENER LENGTH5.750 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
COLORBLACK OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW,CAP,SOCKET HE
END ITEM IDENTIFICATIONKC-46A SE A
MATERIALSTEEL OVERALL
HEAD DIAMETER1.125 INCHES NOMINAL IN
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91251A304?
91251A304 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for 91251A304?
91251A304 is cataloged in the U.S. Government catalog under NSN 5305-01-657-9162. 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.