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121J-440-C3C — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

121J-440-C3C: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.437 INCHES NOMINAL IN, material: STEEL OVERALL, grip_length: 0.400 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, turnlock_stud_head_style: FILLISTER, turnlock_stud_shank_style: STUD SHANK. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-462-1863, 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
121J-440-C3C
NSN: 5325-01-462-1863
FSC: 5325 — Fastening Devices
CAGE: 72794 — SOUTHCO INC (USA)
SPECIFICATIONS
diameter0.437 INCHES NOMINAL IN
materialSTEEL OVERALL
grip_length0.400 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
turnlock_stud_head_styleFILLISTER
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.070 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5325-01-462-1863
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121J-440-C3C · 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
•
MATERIAL ACCOMMODATED THICKNESS: 0.070 INCHES NOMINAL IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
DIAMETER: 0.437 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: FILLISTER
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
MATERIAL: STEEL OVERALL
•
GRIP LENGTH: 0.400 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MATERIAL ACCOMMODATED THICKNESS0.070 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
DIAMETER0.437 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFILLISTER
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALSTEEL OVERALL
GRIP LENGTH0.400 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 2
AJ4-40CBCReference document
Same NSN cross-reference
Reference document — Secondary reference
GS520E8J40Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121J-440-C3C?
121J-440-C3C is a STUD,TURNLOCK FASTENER.
What parts can replace 121J-440-C3C?
There are 2 known substitutes for 121J-440-C3C: AJ4-40CBC, GS520E8J40. Substitute compatibility should be verified for your specific system.
What is the NSN for 121J-440-C3C?
121J-440-C3C is cataloged in the U.S. Government catalog under NSN 5325-01-462-1863. 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.