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10A1551 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

10A1551: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, head_style: ROUND, head_height: 0.094 INCHES NOMINAL IN, head_diameter: 0.312 INCHES NOMINAL IN, thread_length: 0.656 INCHES MINIMUM IN, fastener_length: 0.813 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-638-8307, 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
10A1551
NSN: 5306-00-638-8307
FSC: 5306 — Bolts
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
head_styleROUND
head_height0.094 INCHES NOMINAL IN
head_diameter0.312 INCHES NOMINAL IN
thread_length0.656 INCHES MINIMUM IN
fastener_length0.813 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentNICKEL OVERALL
nominal_thread_diameter0.190 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNF
NSN5306-00-638-8307
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 10A1551 · 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
•
HEAD HEIGHT: 0.094 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.813 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.200 INCHES NOMINAL IN
•
THREAD LENGTH: 0.656 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: ROUND
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.094 INCHES NOMINAL IN
FASTENER LENGTH0.813 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO FLAT0.200 INCHES NOMINAL IN
THREAD LENGTH0.656 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEROUND
THREAD DIRECTIONRIGHT-HAND
NONSTANDARD THREAD PITCH DIAMETER+0.1670 TO 0.1697 INCHES IN
SURFACE TREATMENTNICKEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
BB29186Reference document
Same NSN cross-reference
Reference document — Secondary reference
361958Reference document
Same NSN cross-reference
Reference document — Secondary reference
280213Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10A1551?
10A1551 is a BOLT,MACHINE.
What parts can replace 10A1551?
There are 3 known substitutes for 10A1551: BB29186, 361958, 280213. Substitute compatibility should be verified for your specific system.
What is the NSN for 10A1551?
10A1551 is cataloged in the U.S. Government catalog under NSN 5306-00-638-8307. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.