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PartsTable / COMPONENT / 5/16-18UNC-2AX1-1/4INLGTY1GR316
5/16-18UNC-2AX1-1/4INLGTY1GR316 ✓ 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 5/16-18UNC-2AX1-1/4INLGTY1GR316 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-389-8039, 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
5/16-18UNC-2AX1-1/4INLGTY1GR316
NSN: 5306-01-389-8039
FSC: 5306
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part Number5/16-18UNC-2AX1-1/4INLGTY1GR316
NSN5306-01-389-8039
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5/16-18UNC-2AX1-1/4INLGTY1GR316 · 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
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY MATERIAL
•
THREAD CLASS: 2A A
•
HEAD HEIGHT: 0.195 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM F595 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD QUANTITY PER INCH: 18
TECHNICAL CHARACTERISTICS (FLIS)
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY MATERIAL
THREAD CLASS2A A
HEAD HEIGHT0.195 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM F595 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
END ITEM IDENTIFICATIONMRAP - COUGAR; MRAP - COUGAR CAT1 A2
THREAD QUANTITY PER INCH18
MINIMUM YIELD STRENGTH65000 POUNDS PER SQUARE INCH LBS
MINIMUM TENSILE STRENGTH105000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
M1222RN12C48GFNNUpgraded Successor
successor cross-reference
successor
MIL-S-1222Upgraded Successor
successor cross-reference
successor
MIL-DTL-1222Upgraded Successor
successor cross-reference
successor
306-40172Upgraded Successor
successor cross-reference
successor
1D4703Upgraded Successor
successor cross-reference
successor
M1222RN14C260GCNZEUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5/16-18UNC-2AX1-1/4INLGTY1GR316?
5/16-18UNC-2AX1-1/4INLGTY1GR316 is a 5/16-18UNC-2AX1-1/4INLGTY1GR316.
What parts can replace 5/16-18UNC-2AX1-1/4INLGTY1GR316?
There are 14 known substitutes for 5/16-18UNC-2AX1-1/4INLGTY1GR316: M1222RN12C48GFNN, MIL-S-1222, MIL-DTL-1222 and 11 more. Substitute compatibility should be verified for your specific system.
Is 5/16-18UNC-2AX1-1/4INLGTY1GR316 still available?
5/16-18UNC-2AX1-1/4INLGTY1GR316 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026