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8379660 — BOLT,U

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8379660: BOLT,U.

The BOLT,U is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4150 OVERALL, thread_class: 3A A, thread_length: 1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN, hardness_rating: 24.0 BRINELL HULTGREN MINIMUM AND 28.0 BRINELL HULTGREN MAXIMUM OVERALL, style_designator: SQUARE BEND, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-337-9672, 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
8379660
NSN: 5306-00-337-9672
FSC: 5306 — Bolts
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 4150 OVERALL
thread_class3A A
thread_length1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN
hardness_rating24.0 BRINELL HULTGREN MINIMUM AND 28.0 BRINELL HULTGREN MAXIMUM OVERALL
style_designatorSQUARE BEND
thread_directionRIGHT-HAND
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch16
thread_series_designatorUNF
inside_distance_between_shanks6.312 INCHES MINIMUM AND 6.375 INCHES MAXIMUM IN
material_document_and_classificationASTM A304(SUPERSEDES QQ-S-624) ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_inside_center_of_bend_to_bolt_end12.125 INCHES NOMINAL IN
NSN5306-00-337-9672
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8379660 · 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
•
INSIDE DISTANCE BETWEEN SHANKS: 6.312 INCHES MINIMUM AND 6.375 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN
•
HARDNESS RATING: 24.0 BRINELL HULTGREN MINIMUM AND 28.0 BRINELL HULTGREN MAXIMUM OVERALL
•
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END: 12.125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SQUARE BEND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A304(SUPERSEDES QQ-S-624) ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
INSIDE DISTANCE BETWEEN SHANKS6.312 INCHES MINIMUM AND 6.375 INCHES MAXIMUM IN
THREAD LENGTH1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN
HARDNESS RATING24.0 BRINELL HULTGREN MINIMUM AND 28.0 BRINELL HULTGREN MAXIMUM OVERALL
DISTANCE FROM INSIDE CENTER OF BEND TO BOLT END12.125 INCHES NOMINAL IN
STYLE DESIGNATORSQUARE BEND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A304(SUPERSEDES QQ-S-624) ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A A
THREAD QUANTITY PER INCH16
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES 1
5306003379672Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8379660?
8379660 is a BOLT,U.
What parts can replace 8379660?
There is 1 known substitute for 8379660: 5306003379672. Substitute compatibility should be verified for your specific system.
What is the NSN for 8379660?
8379660 is cataloged in the U.S. Government catalog under NSN 5306-00-337-9672. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.