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Technical Data Sheet
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6AX1403X — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6AX1403X: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_height: 0.625 INCHES NOMINAL IN, thread_class: 3A A, fastener_length: 1.500 INCHES NOMINAL IN, hardness_rating: 37.0 ROCKWELL C MINIMUM OVERALL, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-551-2925, 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
6AX1403X
NSN: 5306-01-551-2925
FSC: 5306 — Bolts
CAGE: Z4117 — VOLVO GROUP GOVERNMENT SALES OCEANI OCEANIA VOLVO GROUP GOVERNMENT SALES (AUS)
SPECIFICATIONS
materialSTEEL OVERALL
head_height0.625 INCHES NOMINAL IN
thread_class3A A
fastener_length1.500 INCHES NOMINAL IN
hardness_rating37.0 ROCKWELL C MINIMUM OVERALL
special_featuresHEAD HEIGHT INCLUDES THICKNESS OF FLANGE; HEAD WIDTH: 0.625 INCHES; EXTREME-STRENGTH STEEL COMPARABLE IN STRENGTH TO GRADE 9 IN
thread_directionRIGHT-HAND
width_between_flats0.9375 INCHES NOMINAL IN
end_item_identificationMRAP BUFFALO MK2A2
nominal_thread_diameter0.625 INCHES IN
minimum_tensile_strength170000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch11
NSN5306-01-551-2925
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6AX1403X · 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: 0.625 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.500 INCHES NOMINAL IN
•
HARDNESS RATING: 37.0 ROCKWELL C MINIMUM OVERALL
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.9375 INCHES NOMINAL IN
•
MINIMUM TENSILE STRENGTH: 170000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.625 INCHES NOMINAL IN
FASTENER LENGTH1.500 INCHES NOMINAL IN
HARDNESS RATING37.0 ROCKWELL C MINIMUM OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.9375 INCHES NOMINAL IN
SPECIAL FEATURESHEAD HEIGHT INCLUDES THICKNESS OF FLANGE; HEAD WIDTH: 0.625 INCHES; EXTREME-STRENGTH STEEL COMPARABLE IN STRENGTH TO GRADE 9 IN
MINIMUM TENSILE STRENGTH170000 POUNDS PER SQUARE INCH LBS
PART NAME ASSIGNED BY CONTROLLING AGENCYSTEEL 12-POINT FLANGE HEAD CAP SCREW
THREAD CLASS3A A
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 2
91271A799Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
25083888Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 6AX1403X?
6AX1403X is a BOLT,MACHINE.
What parts can replace 6AX1403X?
There are 2 known substitutes for 6AX1403X: 91271A799, 25083888. Substitute compatibility should be verified for your specific system.
What is the NSN for 6AX1403X?
6AX1403X is cataloged in the U.S. Government catalog under NSN 5306-01-551-2925. 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.