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137657 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

137657: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, thread_class: 3A A, fastener_length: 3.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.750 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-425-5119, 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
137657
NSN: 5306-01-425-5119
NIINs: 014255119, 016913152, 016934583, 016934585, 016934586, 016934597, 016945823, 016945828
FSC: 5306 — Bolts
CAGE: 98523 — JERED LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
thread_class3A A
fastener_length3.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch10
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationSAE J429, GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5306-01-425-5119
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 137657 · 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: 3.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429, GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 10
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
FASTENER LENGTH3.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429, GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A A
THREAD QUANTITY PER INCH10
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SUBSTITUTES & CROSS-REFERENCES 1
H677D001 FIND 12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 137657?
137657 is a BOLT,MACHINE.
What parts can replace 137657?
There is 1 known substitute for 137657: H677D001 FIND 12. Substitute compatibility should be verified for your specific system.
What is the NSN for 137657?
137657 is cataloged in the U.S. Government catalog under NSN 5306-01-425-5119. 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.