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PartsTable / COMPONENT / 1AB291
1AB291 ✓ 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 STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL, thread_length: 0.625 INCHES MINIMUM NUT THREAD IN, overall_length: 1.438 INCHES NOMINAL IN, thread_direction: RIGHT-HAND STUD THREAD, surface_treatment: PHOSPHATE OVERALL, nominal_thread_size: 0.375 INCHES NUT THREAD 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 5307-00-533-4696, 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
1AB291
NSN: 5307-00-533-4696
FSC: 5307
CAGE: 23382 — FWD SEAGRAVE HOLDINGS LP (USA)
SPECIFICATIONS
materialSTEEL
thread_length0.625 INCHES MINIMUM NUT THREAD IN
overall_length1.438 INCHES NOMINAL IN
thread_directionRIGHT-HAND STUD THREAD
surface_treatmentPHOSPHATE OVERALL
nominal_thread_size0.375 INCHES NUT THREAD IN
thread_pitch_diameters+0.3459 TO 0.3479 INCHES NUT THREAD IN
thread_quantity_per_inch24 NUT THREAD
thread_series_designatorUNS NUT THREAD
NSN5307-00-533-4696
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1AB291 · 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 PITCH DIAMETERS: +0.3374 TO 0.3394 INCHES STUD THREAD IN
•
THREAD QUANTITY PER INCH: 24 NUT THREAD
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
THREAD LENGTH: 0.688 INCHES NOMINAL STUD THREAD IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH1.438 INCHES NOMINAL IN
THREAD PITCH DIAMETERS+0.3374 TO 0.3394 INCHES STUD THREAD IN
THREAD QUANTITY PER INCH24 NUT THREAD
SURFACE TREATMENTPHOSPHATE OVERALL
THREAD PITCH DIAMETERS+0.3459 TO 0.3479 INCHES NUT THREAD IN
THREAD LENGTH0.688 INCHES NOMINAL STUD THREAD IN
MATERIALSTEEL
THREAD LENGTH0.625 INCHES MINIMUM NUT THREAD IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
B29.100 60-2Interchangeable
interchangeable cross-reference
interchangeable
B29.1Interchangeable
interchangeable cross-reference
interchangeable
B291Interchangeable
interchangeable cross-reference
interchangeable
4500291-2Interchangeable
interchangeable cross-reference
interchangeable
BK258Interchangeable
interchangeable cross-reference
interchangeable
100 X 165 FTInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1AB291?
1AB291 is a STUD,PLAIN.
What parts can replace 1AB291?
There are 10 known substitutes for 1AB291: B29.100 60-2, B29.1, B291 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1AB291?
1AB291 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-533-4696. 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