PartsTable
Technical Data Sheet

1321/3818D — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1321/3818D: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, fastener_length: 80.0 MILLIMETERS NOMINAL MM, surface_treatment: ZINC OVERALL, end_item_identification: 2420-01-535-4061, nominal_thread_diameter: 20.0 MILLIMETERS MM, surface_treatment_document_and_classification: ZINC FLAKE FINISH TO JCB STANDARD 9994/1100 MFR REF SINGLE TREATMENT RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-608-5954, 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
1321/3818D
NSN: 5306-01-608-5954
FSC: 5306 — Bolts
CAGE: 0JKF0 — JCB INC. (USA)
SPECIFICATIONS
head_styleHEXAGON
fastener_length80.0 MILLIMETERS NOMINAL MM
surface_treatmentZINC OVERALL
end_item_identification2420-01-535-4061
nominal_thread_diameter20.0 MILLIMETERS MM
thread_series_designatorM
surface_treatment_document_and_classificationZINC FLAKE FINISH TO JCB STANDARD 9994/1100 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NSN5306-01-608-5954
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1321/3818D · 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
•
FASTENER LENGTH: 80.0 MILLIMETERS NOMINAL MM
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ZINC FLAKE FINISH TO JCB STANDARD 9994/1100 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 20.0 MILLIMETERS MM
•
HEAD STYLE: HEXAGON
•
SURFACE TREATMENT: ZINC OVERALL
•
THREAD SERIES DESIGNATOR: M
TECHNICAL CHARACTERISTICS
FASTENER LENGTH80.0 MILLIMETERS NOMINAL MM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONZINC FLAKE FINISH TO JCB STANDARD 9994/1100 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NOMINAL THREAD DIAMETER20.0 MILLIMETERS MM
HEAD STYLEHEXAGON
SURFACE TREATMENTZINC OVERALL
END ITEM IDENTIFICATION2420-01-535-4061
THREAD SERIES DESIGNATORM
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1321/3818D?
1321/3818D is a BOLT,MACHINE.
What is the NSN for 1321/3818D?
1321/3818D is cataloged in the U.S. Government catalog under NSN 5306-01-608-5954. 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.