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9408997 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

9408997: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: UNDERCUT HEXAGON, head_height: 0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.594 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN, fastener_length: 1.670 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-021-4259, 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
9408997
NSN: 5306-00-021-4259
FSC: 5306 — Bolts
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleUNDERCUT HEXAGON
head_height0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
thread_class2A A
thread_length1.594 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
fastener_length1.670 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
locking_featureDISTORTIONS BEARING SURFACE OF HEAD
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM AND CHROMATE OR ZINC OVERALL
width_between_flats0.985 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
NSN5306-00-021-4259
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 9408997 · 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: 0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.670 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM B633,TYPE 1,CLASS 3 ASSN STD 2ND TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 1.594 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A449,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR GM 300-M MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
FASTENER LENGTH1.670 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM B633,TYPE 1,CLASS 3 ASSN STD 2ND TREATMENT RESPONSE OVERALL
THREAD LENGTH1.594 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A449,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR GM 300-M MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEUNDERCUT HEXAGON
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 4
MS35764-520Reference document
Same NSN cross-reference
Reference document — Secondary reference
214259Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-B-45912Reference document
Same NSN cross-reference
Reference document — Identification reference
MS35764-1120Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 9408997?
9408997 is a BOLT,MACHINE.
What parts can replace 9408997?
There are 4 known substitutes for 9408997: MS35764-520, 214259, MIL-B-45912 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9408997?
9408997 is cataloged in the U.S. Government catalog under NSN 5306-00-021-4259. 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.