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PartsTable / COMPONENT / 1AX 165
1AX 165 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, thread_class: 2A A, thread_length: 6.000 INCHES NOMINAL IN, fastener_length: 6.000 INCHES NOMINAL IN, special_features: MATERIAL: THROUGH-HARDENED MEDIUM CARBON ALLOY STEEL; GRADE 8. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-551-8349, 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
1AX 165
NSN: 5306-01-551-8349
FSC: 5306
CAGE: 89619 — MACK TRUCKS, INC. DBA MACUNGIE OPERATIONS DIV LEHIGH VALLEY OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
thread_class2A A
thread_length6.000 INCHES NOMINAL IN
fastener_length6.000 INCHES NOMINAL IN
special_featuresMATERIAL: THROUGH-HARDENED MEDIUM CARBON ALLOY STEEL; GRADE 8
thread_directionRIGHT-HAND
end_item_identification2320-01-531-6425; MRAP BUFFALO MK2A2
nominal_thread_diameter0.6250 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNF
part_name_assigned_by_controlling_agencyHEX HEAD CAP SCREW
NSN5306-01-551-8349
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1AX 165 · 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
•
THREAD QUANTITY PER INCH: 18
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
THREAD CLASS: 2A A
•
THREAD LENGTH: 1.500 INCHES MINIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
FASTENER LENGTH: 6.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH18
NOMINAL THREAD DIAMETER0.625 INCHES IN
THREAD CLASS2A A
THREAD LENGTH1.500 INCHES MINIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT, FINISHED HEXAGON (GRADE 5)
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
FASTENER LENGTH6.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
18972Interchangeable
interchangeable cross-reference
interchangeable
1AX 165Interchangeable
interchangeable cross-reference
interchangeable
MS35304-178Interchangeable
interchangeable cross-reference
interchangeable
25085041Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1AX 165?
1AX 165 is a BOLT,MACHINE.
What parts can replace 1AX 165?
There are 4 known substitutes for 1AX 165: 18972, 1AX 165, MS35304-178 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1AX 165?
1AX 165 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-551-8349. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026