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3970537 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3970537: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON EXTENDED WASHER, grip_length: 2.00 INCHES NOMINAL IN, head_height: 0.39 INCHES MAXIMUM IN, thread_class: 2A A, grip_diameter: 0.3690 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-608-7337, 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
3970537
NSN: 5306-01-608-7337
NIINs: 016087337, 016087520, 016087672, 016087910, 016093936, 016093938, 016093941, 016093946, 016093950, 016093984, 016093988, 016117960, 016118104, 016119345, 016120407, 016123186, 016141541, 016163639, 016518981, 016524298, 016524441, 016527622, 016573714, 016578963, 016579005, 016586851, 016623388, 016623404, 016663276, 016663280, 016663289, 016872962, 017327550
FSC: 5306 — Bolts
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON EXTENDED WASHER
grip_length2.00 INCHES NOMINAL IN
head_height0.39 INCHES MAXIMUM IN
thread_class2A A
grip_diameter0.3690 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
thread_length1.00 INCHES NOMINAL IN
fastener_length3.00 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE AND ZINC AND ALUMINUM OVERALL
width_between_flats0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
end_item_identification017006486
NSN5306-01-608-7337
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3970537 · 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
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
3970537045Reference 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 3970537?
3970537 is a BOLT,MACHINE.
What parts can replace 3970537?
There is 1 known substitute for 3970537: 3970537045. Substitute compatibility should be verified for your specific system.
What is the NSN for 3970537?
3970537 is cataloged in the U.S. Government catalog under NSN 5306-01-608-7337. 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.