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Technical Data Sheet
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1D4644 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1D4644: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.675 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 2.625 INCHES NOMINAL IN, fastener_length: 8.000 INCHES NOMINAL IN, special_features: FINISH COLOR BLACK. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-929-9443, 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
1D4644
NSN: 5306-00-929-9443
FSC: 5306 — Bolts
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.675 INCHES NOMINAL IN
thread_class2A A
thread_length2.625 INCHES NOMINAL IN
fastener_length8.000 INCHES NOMINAL IN
special_featuresFINISH COLOR BLACK
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats1.479 INCHES NOMINAL IN
nominal_thread_diameter1.000 INCHES IN
thread_quantity_per_inch8
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-00-929-9443
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1D4644 · 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: 0.675 INCHES NOMINAL IN
•
FASTENER LENGTH: 8.000 INCHES NOMINAL IN
•
THREAD LENGTH: 2.625 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GRADE 8 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
NOMINAL THREAD DIAMETER: 1.000 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.675 INCHES NOMINAL IN
FASTENER LENGTH8.000 INCHES NOMINAL IN
THREAD LENGTH2.625 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GRADE 8 ASSN STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER1.000 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS1.479 INCHES NOMINAL IN
SPECIAL FEATURESFINISH COLOR BLACK
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1D4644?
1D4644 is a BOLT,MACHINE.
What is the NSN for 1D4644?
1D4644 is cataloged in the U.S. Government catalog under NSN 5306-00-929-9443. 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.