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Technical Data Sheet
PartsTable / COMPONENT / 3006638
3006638 ✓ 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 material: STEEL OVERALL, head_style: HEXAGON, fastener_length: 1.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, end_item_identification: 2320-01-529-2251 TRUCK,BOMB SERVICE, BUFFALO HEAVY MINE PROTECTED CLEARANCE VEHICLE, nominal_thread_diameter: 0.250 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-568-1613, 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
3006638
NSN: 5305-01-568-1613
FSC: 5305
CAGE: 1EFH8 — GENERAL DYNAMICS LAND SYSTEMS - FORCE PROTECTION INC. DBA GDLS DIV GDLS-FP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
fastener_length1.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
end_item_identification2320-01-529-2251 TRUCK,BOMB SERVICE, BUFFALO HEAVY MINE PROTECTED CLEARANCE VEHICLE
nominal_thread_diameter0.250 INCHES IN
minimum_tensile_strength150000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-568-1613
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3006638 · 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
•
HEAD STYLE: HEXAGON
•
MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH LBS
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 20
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEXAGON
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD DIRECTIONRIGHT-HAND
END ITEM IDENTIFICATION2320-01-529-2251 TRUCK,BOMB SERVICE, BUFFALO HEAVY MINE PROTECTED CLEARANCE VEHICLE
THREAD QUANTITY PER INCH20
FASTENER LENGTH1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
39004Interchangeable
interchangeable cross-reference
interchangeable
K39004Interchangeable
interchangeable cross-reference
interchangeable
FG7660BInterchangeable
interchangeable cross-reference
interchangeable
12310949Interchangeable
interchangeable cross-reference
interchangeable
37304Interchangeable
interchangeable cross-reference
interchangeable
CL 4 SCWInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3006638?
3006638 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 3006638?
There are 10 known substitutes for 3006638: 39004, K39004, FG7660B and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3006638?
3006638 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-568-1613. 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