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Technical Data Sheet
PartsTable / COMPONENT / 91263A544
91263A544 ✓ 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 material: STEEL OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.411 INCHES NOMINAL IN, thread_length: 0.373 INCHES NOMINAL IN, fastener_length: 0.500 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 5305-01-628-5939, 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
91263A544
NSN: 5305-01-628-5939
FSC: 5305
CAGE: 0KVE6 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.411 INCHES NOMINAL IN
thread_length0.373 INCHES NOMINAL IN
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
end_item_identification2350-01-458-7318
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-628-5939
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91263A544 · 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
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD CLASS: 3A A
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.125 INCHES NOMINAL IN
•
THREAD LENGTH: 0.373 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF
THREAD CLASS3A A
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
THREAD LENGTH0.373 INCHES NOMINAL IN
THREAD QUANTITY PER INCH32
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
HEAD DIAMETER0.411 INCHES NOMINAL IN
INTERNAL DRIVE STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
PC985Interchangeable
interchangeable cross-reference
interchangeable
94210Interchangeable
interchangeable cross-reference
interchangeable
7013201Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91263A544?
91263A544 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 91263A544?
There are 3 known substitutes for 91263A544: PC985, 94210, 7013201. Substitute compatibility should be verified for your specific system.
What is the NSN for 91263A544?
91263A544 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-628-5939. 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