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8T4648 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8T4648: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, grip_length: 40.000 MILLIMETERS NOMINAL MM, head_height: 8.000 MILLIMETERS NOMINAL MM, thread_length: 30.000 MILLIMETERS NOMINAL MM, fastener_length: 70.000 MILLIMETERS NOMINAL MM, width_between_flats: 18.000 MILLIMETERS NOMINAL MM. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-429-3172, 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
8T4648
NSN: 5306-01-429-3172
FSC: 5306 — Bolts
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
head_styleHEXAGON
grip_length40.000 MILLIMETERS NOMINAL MM
head_height8.000 MILLIMETERS NOMINAL MM
thread_length30.000 MILLIMETERS NOMINAL MM
fastener_length70.000 MILLIMETERS NOMINAL MM
width_between_flats18.000 MILLIMETERS NOMINAL MM
end_item_identificationCATERPILLAR 953B ENGINE
nominal_thread_diameter12.000 MILLIMETERS MM
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
thread_pitch_in_millimeters1.750
NSN5306-01-429-3172
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8T4648 · 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: 8.000 MILLIMETERS NOMINAL MM
•
FASTENER LENGTH: 70.000 MILLIMETERS NOMINAL MM
•
THREAD PITCH IN MILLIMETERS: 1.750
•
THREAD LENGTH: 30.000 MILLIMETERS NOMINAL MM
•
NOMINAL THREAD DIAMETER: 12.000 MILLIMETERS MM
•
HEAD STYLE: HEXAGON
•
GRIP LENGTH: 40.000 MILLIMETERS NOMINAL MM
•
WIDTH BETWEEN FLATS: 18.000 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
HEAD HEIGHT8.000 MILLIMETERS NOMINAL MM
FASTENER LENGTH70.000 MILLIMETERS NOMINAL MM
THREAD PITCH IN MILLIMETERS1.750
THREAD LENGTH30.000 MILLIMETERS NOMINAL MM
NOMINAL THREAD DIAMETER12.000 MILLIMETERS MM
HEAD STYLEHEXAGON
GRIP LENGTH40.000 MILLIMETERS NOMINAL MM
WIDTH BETWEEN FLATS18.000 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONCATERPILLAR 953B ENGINE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
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
A08462Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8T4648?
8T4648 is a BOLT,MACHINE.
What parts can replace 8T4648?
There is 1 known substitute for 8T4648: A08462. Substitute compatibility should be verified for your specific system.
What is the NSN for 8T4648?
8T4648 is cataloged in the U.S. Government catalog under NSN 5306-01-429-3172. 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.