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Technical Data Sheet
PartsTable / COMPONENT / 5/16-18 UNC-2A X 1 IN LG
5/16-18 UNC-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 5/16-18 UNC-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 5305-01-267-9015, 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
5/16-18 UNC-2A X 1 IN LG
NSN: 5305-01-267-9015
FSC: 5305
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
Part Number5/16-18 UNC-2A X 1 IN LG
NSN5305-01-267-9015
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5/16-18 UNC-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 CLASS: 2A A
•
COUNTERSINK ANGLE: 82.0 DEGREES NOMINAL
•
MATERIAL: NICKEL ALLOY 400 OVERALL
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD LENGTH: 0.889 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
HEAD DIAMETER: 0.568 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
POINT STYLE: FLAT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
MATERIALNICKEL ALLOY 400 OVERALL
INTERNAL DRIVE STYLESLOT
THREAD LENGTH0.889 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
HEAD DIAMETER0.568 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
POINT STYLEFLAT
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
FASTENER LENGTH1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
245122Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92 TY-1 ST Y-2SInterchangeable
interchangeable cross-reference
interchangeable
MS35200-12Interchangeable
interchangeable cross-reference
interchangeable
49715-05-01R01 ITEM 6Interchangeable
interchangeable cross-reference
interchangeable
203-2581151 ITEM 6Interchangeable
interchangeable cross-reference
interchangeable
1/2 IN 13UNC-2A X 2IN LGInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5/16-18 UNC-2A X 1 IN LG?
5/16-18 UNC-2A X 1 IN LG is a 5/16-18 UNC-2A X 1 IN LG.
What parts can replace 5/16-18 UNC-2A X 1 IN LG?
There are 13 known substitutes for 5/16-18 UNC-2A X 1 IN LG: 245122, FF-S-92 TY-1 ST Y-2S, MS35200-12 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5/16-18 UNC-2A X 1 IN LG?
5/16-18 UNC-2A X 1 IN LG is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-267-9015. 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