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Technical Data Sheet
PartsTable / COMPONENT / 5/16-18UNC-2A X 1 IN LG
5/16-18UNC-2A X 1 IN LG ✓ 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-2A X 1 IN LG 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 5305-01-298-9734, 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-2A X 1 IN LG
NSN: 5305-01-298-9734
FSC: 5305
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part Number5/16-18UNC-2A X 1 IN LG
NSN5305-01-298-9734
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5/16-18UNC-2A X 1 IN LG · 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 SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
HEAD DIAMETER: 0.568 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.668 INCHES MINIMUM AND 0.809 INCHES MAXIMUM IN
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 2S STYLE
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
INTERNAL DRIVE STYLE: SLOT
•
FASTENER LENGTH: 0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HEAD DIAMETER0.568 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
THREAD LENGTH0.668 INCHES MINIMUM AND 0.809 INCHES MAXIMUM IN
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 2S STYLE
NOMINAL THREAD DIAMETER0.312 INCHES IN
INTERNAL DRIVE STYLESLOT
FASTENER LENGTH0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
THREAD CLASS2A A
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
5/16-18 UNC-2A X 1 IN LGInterchangeable
interchangeable cross-reference
interchangeable
FF-S-92 TY1 STY2SInterchangeable
interchangeable cross-reference
interchangeable
122-6722635 PC 59Interchangeable
Same NIIN cross-reference
interchangeable
FF-S-92Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5/16-18UNC-2A X 1 IN LG?
5/16-18UNC-2A X 1 IN LG is a 5/16-18UNC-2A X 1 IN LG.
What parts can replace 5/16-18UNC-2A X 1 IN LG?
There are 4 known substitutes for 5/16-18UNC-2A X 1 IN LG: 5/16-18 UNC-2A X 1 IN LG, FF-S-92 TY1 STY2S, 122-6722635 PC 59 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5/16-18UNC-2A X 1 IN LG?
5/16-18UNC-2A X 1 IN LG is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-298-9734. 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