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Technical Data Sheet
PartsTable / COMPONENT / 12759-01257
12759-01257 ✓ 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: 1A A, fastener_length: 0.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-532-0401, 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
12759-01257
NSN: 5305-01-532-0401
FSC: 5305
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEADLESS (SETSCREW)
point_styleCUP
thread_class1A A
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNF
NSN5305-01-532-0401
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12759-01257 · 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: 0.500 INCHES NOMINAL IN
•
THREAD CLASS: 1A A
•
WIDTH ACROSS FLATS: 0.125 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
MATERIAL: STEEL OVERALL
•
INTERNAL DRIVE STYLE: HEXAGON
•
THREAD QUANTITY PER INCH: 20
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.500 INCHES NOMINAL IN
THREAD CLASS1A A
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
MATERIALSTEEL OVERALL
INTERNAL DRIVE STYLEHEXAGON
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNF
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEADLESS (SETSCREW)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
25330Interchangeable
interchangeable cross-reference
interchangeable
25459Interchangeable
interchangeable cross-reference
interchangeable
677-0391-00Interchangeable
interchangeable cross-reference
interchangeable
D5254Interchangeable
interchangeable cross-reference
interchangeable
DDMAMF500Interchangeable
interchangeable cross-reference
interchangeable
GDMAMT-50PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12759-01257?
12759-01257 is a SETSCREW.
What parts can replace 12759-01257?
There are 8 known substitutes for 12759-01257: 25330, 25459, 677-0391-00 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12759-01257?
12759-01257 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-532-0401. 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