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663789 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

663789: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 0.062 INCHES NOMINAL IN, head_height: 0.250 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.375 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-736-2375, 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
663789
NSN: 5306-00-736-2375
FSC: 5306 — Bolts
CAGE: 58275 — SASCO INC CANADIAN DIV
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length0.062 INCHES NOMINAL IN
head_height0.250 INCHES NOMINAL IN
thread_class2A A
thread_length0.375 INCHES MINIMUM IN
fastener_length0.438 INCHES NOMINAL IN
special_features2 DRILLED HOLES
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.500 INCHES NOMINAL IN
nominal_thread_diameter0.312 INCHES IN
NSN5306-00-736-2375
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 663789 · 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: 0.250 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.438 INCHES NOMINAL IN
•
THREAD LENGTH: 0.375 INCHES MINIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633,CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.250 INCHES NOMINAL IN
FASTENER LENGTH0.438 INCHES NOMINAL IN
THREAD LENGTH0.375 INCHES MINIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633,CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.062 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.500 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES 2
334D5Reference document
Same NSN cross-reference
Reference document — Secondary reference
5306007362375Reference 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 663789?
663789 is a BOLT,MACHINE.
What parts can replace 663789?
There are 2 known substitutes for 663789: 334D5, 5306007362375. Substitute compatibility should be verified for your specific system.
What is the NSN for 663789?
663789 is cataloged in the U.S. Government catalog under NSN 5306-00-736-2375. 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.