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Technical Data Sheet
PartsTable / COMPONENT / 90251A576
90251A576 ✓ 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 SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEADLESS (SETSCREW), point_style: CUP, thread_class: 3A A, fastener_length: 0.375 INCHES NOMINAL IN, special_features: ITEM HAS SELF LOCKING NYLON PATCH.. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-545-8352, 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
90251A576
NSN: 5305-01-545-8352
FSC: 5305
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEADLESS (SETSCREW)
point_styleCUP
thread_class3A A
fastener_length0.375 INCHES NOMINAL IN
special_featuresITEM HAS SELF LOCKING NYLON PATCH.
thread_directionRIGHT-HAND
width_across_flats0.156 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.312 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-545-8352
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 90251A576 · 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
•
POINT STYLE: CUP
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
INTERNAL DRIVE STYLE: HEXAGON
•
HEAD STYLE: HEADLESS (SETSCREW)
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 18
•
WIDTH ACROSS FLATS: 0.156 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
POINT STYLECUP
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
INTERNAL DRIVE STYLEHEXAGON
HEAD STYLEHEADLESS (SETSCREW)
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH18
WIDTH ACROSS FLATS0.156 INCHES NOMINAL IN
FASTENER LENGTH0.375 INCHES NOMINAL IN
THREAD CLASS3A A
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
2254Interchangeable
interchangeable cross-reference
interchangeable
P1200Interchangeable
interchangeable cross-reference
interchangeable
36-1809Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 90251A576?
90251A576 is a SETSCREW.
What parts can replace 90251A576?
There are 3 known substitutes for 90251A576: 2254, P1200, 36-1809. Substitute compatibility should be verified for your specific system.
What is the NSN for 90251A576?
90251A576 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-545-8352. 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