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Technical Data Sheet
PartsTable / COMPONENT / 8380671
8380671 ✓ 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 BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DEE, head_height: 0.500 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.875 INCHES NOMINAL IN, thread_length: 1.312 INCHES MINIMUM 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 5306-00-275-8385, 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
8380671
NSN: 5306-00-275-8385
FSC: 5306
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDEE
head_height0.500 INCHES NOMINAL IN
thread_class3A A
head_diameter1.875 INCHES NOMINAL IN
thread_length1.312 INCHES MINIMUM IN
fastener_length7.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedCASEHARDENED
counterbore_diameter0.188 INCHES NOMINAL IN
concentric_hole_depth3.500 INCHES NOMINAL IN
concentric_hole_diameter0.328 INCHES NOMINAL IN
NSN5306-00-275-8385
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8380671 · 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 LENGTH: 1.312 INCHES MINIMUM IN
•
HEAD STYLE: DEE
•
HEAD HEIGHT: 0.500 INCHES NOMINAL IN
•
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER: 7.000 INCHES NOMINAL FIRST HOLE IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624,FS2340 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNF
•
COUNTERBORE DIAMETER: 0.188 INCHES NOMINAL IN
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH1.312 INCHES MINIMUM IN
HEAD STYLEDEE
HEAD HEIGHT0.500 INCHES NOMINAL IN
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER7.000 INCHES NOMINAL FIRST HOLE IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624,FS2340 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNF
COUNTERBORE DIAMETER0.188 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
CONCENTRIC HOLE DIAMETER0.328 INCHES NOMINAL IN
FASTENER LENGTH7.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
BB1725Interchangeable
interchangeable cross-reference
interchangeable
42E7Y1177Interchangeable
interchangeable cross-reference
interchangeable
605821Interchangeable
interchangeable cross-reference
interchangeable
53327Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8380671?
8380671 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace 8380671?
There are 4 known substitutes for 8380671: BB1725, 42E7Y1177, 605821 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8380671?
8380671 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-275-8385. 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