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Technical Data Sheet
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12018A7003 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12018A7003: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.31 INCHES NOMINAL IN, thread_class: 2A A, fastener_length: 4.5 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, width_between_flats: 0.75 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-631-0770, 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
12018A7003
NSN: 5306-01-631-0770
FSC: 5306 — Bolts
CAGE: 01365 — MARINE CORPS SYSTEMS COMMAND DIV MARINE CORPS SYSTEMS COMMAND TECHNICAL DATA REPOSITORY CUSTOMER SERVICE (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.31 INCHES NOMINAL IN
thread_class2A A
fastener_length4.5 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.75 INCHES NOMINAL IN
end_item_identification3990-01-537-1045
nominal_thread_diameter0.5 INCHES IN
thread_quantity_per_inch13
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
part_name_assigned_by_controlling_agencyBOLT, .500-13X4.50,ALTERED
NSN5306-01-631-0770
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12018A7003 · 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: 0.31 INCHES NOMINAL IN
•
FASTENER LENGTH: 4.5 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.5 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.75 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.31 INCHES NOMINAL IN
FASTENER LENGTH4.5 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.5 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.75 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT, .500-13X4.50,ALTERED
THREAD CLASS2A A
END ITEM IDENTIFICATION3990-01-537-1045
THREAD QUANTITY PER INCH13
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12018A7003?
12018A7003 is a BOLT,MACHINE.
What is the NSN for 12018A7003?
12018A7003 is cataloged in the U.S. Government catalog under NSN 5306-01-631-0770. 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.