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2GL663 ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include fastener_length: 3.750 INCHES NOMINAL IN, nominal_thread_diameter: 0.312 INCHES IN, thread_quantity_per_inch: 18. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-348-2563, 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
2GL663
NSN: 5305-01-348-2563
FSC: 5305
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
fastener_length3.750 INCHES NOMINAL IN
nominal_thread_diameter0.312 INCHES IN
thread_quantity_per_inch18
NSN5305-01-348-2563
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2GL663 · 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
•
FASTENER LENGTH: 3.750 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 18
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH3.750 INCHES NOMINAL IN
THREAD QUANTITY PER INCH18
END ITEM IDENTIFICATION2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM);TRUCK TRACTOR,ARMOR;TRUCK,WRECKER,ARMOR;HEAVY EQUIPMENT TRUCK TRACTOR,M1070; MRAP - COUGAR; MRAP - COUGAR ISS; MRAP - COUGAR ISS 1.0
NOMINAL THREAD DIAMETER0.312 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
313GXInterchangeable
interchangeable cross-reference
interchangeable
310AZInterchangeable
interchangeable cross-reference
interchangeable
181-124Interchangeable
interchangeable cross-reference
interchangeable
90416Interchangeable
interchangeable cross-reference
interchangeable
103 INSULATORInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2GL663?
2GL663 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 2GL663?
There are 5 known substitutes for 2GL663: 313GX, 310AZ, 181-124 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2GL663?
2GL663 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-348-2563. 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