PartsTable
Technical Data Sheet
Download PDF

3908181 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3908181: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, special_features: GENERATOR SET ,FLYWHEEL,HEX SCREW SIZE:M12X1.25X50, thread_direction: RIGHT-HAND, end_item_identification: 6CT8.3DMGA MARINE DIESEL ENGINE, thread_quantity_per_inch: 12, part_name_assigned_by_controlling_agency: SCREW,CAP,HEXAGON HEAD. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-688-0656, 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
3908181
NSN: 5305-01-688-0656
FSC: 5305 — Screws
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
head_styleHEXAGON
special_featuresGENERATOR SET ,FLYWHEEL,HEX SCREW SIZE:M12X1.25X50
thread_directionRIGHT-HAND
end_item_identification6CT8.3DMGA MARINE DIESEL ENGINE
thread_quantity_per_inch12
thread_series_designatorM
part_name_assigned_by_controlling_agencySCREW,CAP,HEXAGON HEAD
NSN5305-01-688-0656
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3908181 · 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
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 12
•
THREAD SERIES DESIGNATOR: M
TECHNICAL CHARACTERISTICS
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESGENERATOR SET ,FLYWHEEL,HEX SCREW SIZE:M12X1.25X50
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW,CAP,HEXAGON HEAD
END ITEM IDENTIFICATION6CT8.3DMGA MARINE DIESEL ENGINE
THREAD QUANTITY PER INCH12
THREAD SERIES DESIGNATORM
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 3908181?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 3908181?
3908181 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 3908181?
3908181 is cataloged in the U.S. Government catalog under NSN 5305-01-688-0656. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 3908181

✓ 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.