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8380901 — BOLT,RIBBED SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8380901: BOLT,RIBBED SHOULDER.

The BOLT,RIBBED SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, rib_length: 0.046 INCHES MINIMUM IN, head_height: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-226-9276, 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
8380901
NSN: 5306-00-226-9276
FSC: 5306 — Bolts
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
rib_length0.046 INCHES MINIMUM IN
head_height0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.875 INCHES NOMINAL IN
thread_length1.062 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.125 INCHES MINIMUM AND 2.141 INCHES MAXIMUM IN
shoulder_length0.693 INCHES MINIMUM AND 0.703 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.838 INCHES MINIMUM AND 0.843 INCHES MAXIMUM FIRST SHOULDER IN
NSN5306-00-226-9276
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8380901 · 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 HEIGHT: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.125 INCHES MINIMUM AND 2.141 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.693 INCHES MINIMUM AND 0.703 INCHES MAXIMUM FIRST SHOULDER IN
•
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS: 0.078 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.838 INCHES MINIMUM AND 0.843 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 1.062 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
RIB LENGTH: 0.046 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
FASTENER LENGTH2.125 INCHES MINIMUM AND 2.141 INCHES MAXIMUM IN
SHOULDER LENGTH0.693 INCHES MINIMUM AND 0.703 INCHES MAXIMUM FIRST SHOULDER IN
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS0.078 INCHES MAXIMUM IN
SHOULDER DIAMETER0.838 INCHES MINIMUM AND 0.843 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH1.062 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
RIB LENGTH0.046 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEFLAT CHAMFER
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
3665386Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8380901?
8380901 is a BOLT,RIBBED SHOULDER.
What parts can replace 8380901?
There is 1 known substitute for 8380901: 3665386. Substitute compatibility should be verified for your specific system.
What is the NSN for 8380901?
8380901 is cataloged in the U.S. Government catalog under NSN 5306-00-226-9276. 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.