PartsTable
Technical Data Sheet
Download PDF

121J-W340-Z3C — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

121J-W340-Z3C: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 0.400 INCHES NOMINAL IN, head_length: 0.625 INCHES NOMINAL IN, stud_head_height: 0.250 INCHES NOMINAL IN, shank_neck_length: 0.200 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-433-0050, 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-W340-Z3C
NSN: 5325-00-433-0050
FSC: 5325 — Fastening Devices
CAGE: 72794 — SOUTHCO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
grip_length0.400 INCHES NOMINAL IN
head_length0.625 INCHES NOMINAL IN
stud_head_height0.250 INCHES NOMINAL IN
shank_neck_length0.200 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
turnlock_stud_head_styleFILLISTER WING
stud_shank_major_diameter0.187 INCHES NOMINAL IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.265 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
NSN5325-00-433-0050
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121J-W340-Z3C · 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 LENGTH: 0.625 INCHES NOMINAL IN
•
MATERIAL ACCOMMODATED THICKNESS: 0.265 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
STUD HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
SHANK NECK LENGTH: 0.200 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: FILLISTER WING
•
STUD SHANK MAJOR DIAMETER: 0.187 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
HEAD LENGTH0.625 INCHES NOMINAL IN
MATERIAL ACCOMMODATED THICKNESS0.265 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
STUD HEAD HEIGHT0.250 INCHES NOMINAL IN
SHANK NECK LENGTH0.200 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFILLISTER WING
STUD SHANK MAJOR DIAMETER0.187 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
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
AJW3-40Reference document
Same NSN cross-reference
Reference document — Secondary reference
12AA17329-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 121J-W340-Z3C?
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 121J-W340-Z3C?
121J-W340-Z3C is a STUD,TURNLOCK FASTENER.
What parts can replace 121J-W340-Z3C?
There are 2 known substitutes for 121J-W340-Z3C: AJW3-40, 12AA17329-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 121J-W340-Z3C?
121J-W340-Z3C is cataloged in the U.S. Government catalog under NSN 5325-00-433-0050. 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 — 121J-W340-Z3C

✓ 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.