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PartsTable / COMPONENT / 91251A110
91251A110 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include color: BLACK OVERALL, material: ALUMINUM ALLOY OVERALL, head_style: FLAT CHAMFER, head_height: 0.112 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.183 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-625-1635, 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
91251A110
NSN: 5305-01-625-1635
FSC: 5305
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
colorBLACK OVERALL
materialALUMINUM ALLOY OVERALL
head_styleFLAT CHAMFER
head_height0.112 INCHES NOMINAL IN
thread_class3A A
head_diameter0.183 INCHES NOMINAL IN
thread_length0.50 INCHES NOMINAL IN
fastener_length0.50 INCHES NOMINAL IN
special_featuresMCMASTER-CARR HOLDS DESIGN CONTROL OF ITEM BUT IS NOT OEM
thread_directionRIGHT-HAND
surface_treatmentOXIDE OVERALL
width_across_flats0.094 INCHES NOMINAL IN
NSN5305-01-625-1635
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91251A110 · 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
•
SURFACE TREATMENT: OXIDE OVERALL
•
THREAD QUANTITY PER INCH: 40
•
WIDTH ACROSS FLATS: 0.094 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
FASTENER LENGTH: 0.50 INCHES NOMINAL IN
•
INTERNAL DRIVE STYLE: HEXAGON
•
HEAD HEIGHT: 0.112 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTOXIDE OVERALL
THREAD QUANTITY PER INCH40
WIDTH ACROSS FLATS0.094 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESMCMASTER-CARR HOLDS DESIGN CONTROL OF ITEM BUT IS NOT OEM
FASTENER LENGTH0.50 INCHES NOMINAL IN
INTERNAL DRIVE STYLEHEXAGON
HEAD HEIGHT0.112 INCHES NOMINAL IN
HEAD STYLEFLAT CHAMFER
THREAD CLASS3A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
80044Interchangeable
interchangeable cross-reference
interchangeable
51HInterchangeable
interchangeable cross-reference
interchangeable
70346Interchangeable
interchangeable cross-reference
interchangeable
306GInterchangeable
interchangeable cross-reference
interchangeable
1/4-6Interchangeable
interchangeable cross-reference
interchangeable
7163A33Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91251A110?
91251A110 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 91251A110?
There are 14 known substitutes for 91251A110: 80044, 51H, 70346 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91251A110?
91251A110 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-625-1635. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026