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121J-W350-Z3C — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

121J-W350-Z3C: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, head_length: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, stud_head_height: 0.250 INCHES NOMINAL IN, shank_neck_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, surface_treatment: CHROMATE AND ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-296-5399, 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-W350-Z3C
NSN: 5325-01-296-5399
FSC: 5325 — Fastening Devices
CAGE: 72794 — SOUTHCO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
grip_length0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
head_length0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
stud_head_height0.250 INCHES NOMINAL IN
shank_neck_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
surface_treatmentCHROMATE AND ZINC OVERALL
securing_device_typeRING
turnlock_stud_head_styleFILLISTER WING
stud_shank_major_diameter0.183 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.250 INCHES NOMINAL IN
surface_treatment_document_and_classificationASTM B633,FE/ZA 25 SC4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5325-01-296-5399
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121J-W350-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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633,FE/ZA 25 SC4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
HEAD LENGTH: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
MATERIAL ACCOMMODATED THICKNESS: 0.250 INCHES NOMINAL IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
STUD HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
SHANK NECK LENGTH: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
SECURING DEVICE TYPE: RING
•
TURNLOCK STUD HEAD STYLE: FILLISTER WING
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633,FE/ZA 25 SC4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HEAD LENGTH0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS0.250 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
STUD HEAD HEIGHT0.250 INCHES NOMINAL IN
SHANK NECK LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
SECURING DEVICE TYPERING
TURNLOCK STUD HEAD STYLEFILLISTER WING
STUD SHANK MAJOR DIAMETER0.183 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
SURFACE TREATMENTCHROMATE AND ZINC OVERALL
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
AJW3-50Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
10119169-101Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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-W350-Z3C?
121J-W350-Z3C is a STUD,TURNLOCK FASTENER.
What parts can replace 121J-W350-Z3C?
There are 2 known substitutes for 121J-W350-Z3C: AJW3-50, 10119169-101. Substitute compatibility should be verified for your specific system.
What is the NSN for 121J-W350-Z3C?
121J-W350-Z3C is cataloged in the U.S. Government catalog under NSN 5325-01-296-5399. 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.