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Technical Data Sheet
PartsTable / COMPONENT / 0.312-18UNC-2AX0.875LG STL
0.312-18UNC-2AX0.875LG STL ✓ 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 0.312-18UNC-2AX0.875LG STL is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-497-7528, 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
0.312-18UNC-2AX0.875LG STL
NSN: 5305-01-497-7528
FSC: 5305
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part Number0.312-18UNC-2AX0.875LG STL
NSN5305-01-497-7528
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 0.312-18UNC-2AX0.875LG STL · 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
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
THREAD CLASS: 2A A
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 18
•
FASTENER LENGTH: 0.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONACTUATOR RTRY
NOMINAL THREAD DIAMETER0.312 INCHES IN
THREAD CLASS2A A
SURFACE TREATMENTCADMIUM OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH18
FASTENER LENGTH0.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
14173-2Interchangeable
interchangeable cross-reference
interchangeable
PX10021Interchangeable
interchangeable cross-reference
interchangeable
14173Interchangeable
interchangeable cross-reference
interchangeable
41735Interchangeable
interchangeable cross-reference
interchangeable
7916593-004Interchangeable
interchangeable cross-reference
interchangeable
5930PL0906818Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 0.312-18UNC-2AX0.875LG STL?
0.312-18UNC-2AX0.875LG STL is a 0.312-18UNC-2AX0.875LG STL.
What parts can replace 0.312-18UNC-2AX0.875LG STL?
There are 7 known substitutes for 0.312-18UNC-2AX0.875LG STL: 14173-2, PX10021, 14173 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0.312-18UNC-2AX0.875LG STL?
0.312-18UNC-2AX0.875LG STL is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-497-7528. 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