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Technical Data Sheet
PartsTable / COMPONENT / CMG/400121
CMG/400121 ✓ 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 CMG/400121 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-538-8251, 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
CMG/400121
NSN: 5305-01-538-8251
FSC: 5305
CAGE: 64678 — DAIMLER TRUCK NORTH AMERICA LLC (USA)
SPECIFICATIONS
Part NumberCMG/400121
NSN5305-01-538-8251
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: CMG/400121 · 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
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP SCREW
SPECIAL FEATURESCAP SCREW 3/8 NC X 1 QUANTITY OF 8
END ITEM IDENTIFICATIONNSN: 3805-01-431-1165
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
AMS-QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
ASTM B221Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
AA7T279Interchangeable
interchangeable cross-reference
interchangeable
400121Interchangeable
interchangeable cross-reference
interchangeable
25327Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CMG/400121?
CMG/400121 is a CMG/400121.
What parts can replace CMG/400121?
There are 11 known substitutes for CMG/400121: AMS-QQ-A-200/3, ASTM B221, QQ-A-200/3 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CMG/400121?
CMG/400121 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-538-8251. 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