PartsTable
Technical Data Sheet
Download PDF

3M303A4-2 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M303A4-2: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.3464 INCHES MINIMUM AND 0.3553 INCHES MAXIMUM IN, material: STEEL COMP 8740 OVERALL, drive_type: SOCKET, grip_length: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, extension_length: 0.361 INCHES NOMINAL IN, stud_head_height: 0.0194 INCHES MINIMUM AND 0.0240 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-326-5331, 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
3M303A4-2
NSN: 5325-00-326-5331
FSC: 5325 — Fastening Devices
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
diameter0.3464 INCHES MINIMUM AND 0.3553 INCHES MAXIMUM IN
materialSTEEL COMP 8740 OVERALL
drive_typeSOCKET
grip_length0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
extension_length0.361 INCHES NOMINAL IN
stud_head_height0.0194 INCHES MINIMUM AND 0.0240 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
securing_device_typeRING
turnlock_stud_head_styleFLAT FILLISTER
stud_shank_major_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.125 INCHES NOMINAL IN
NSN5325-00-326-5331
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M303A4-2 · 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: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DRIVE TYPE: SOCKET
•
MATERIAL ACCOMMODATED THICKNESS: 0.125 INCHES NOMINAL IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
EXTENSION LENGTH: 0.361 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.3464 INCHES MINIMUM AND 0.3553 INCHES MAXIMUM IN
•
STUD HEAD HEIGHT: 0.0194 INCHES MINIMUM AND 0.0240 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
DRIVE TYPESOCKET
MATERIAL ACCOMMODATED THICKNESS0.125 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
EXTENSION LENGTH0.361 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.3464 INCHES MINIMUM AND 0.3553 INCHES MAXIMUM IN
STUD HEAD HEIGHT0.0194 INCHES MINIMUM AND 0.0240 INCHES MAXIMUM IN
SECURING DEVICE TYPERING
TURNLOCK STUD HEAD STYLEFLAT FILLISTER
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 4
01926-4-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
3M303-4-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
1926-4-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
M1926-4-2Reference 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
Ready to buy 3M303A4-2?
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 3M303A4-2?
3M303A4-2 is a STUD,TURNLOCK FASTENER.
What parts can replace 3M303A4-2?
There are 4 known substitutes for 3M303A4-2: 01926-4-2, 3M303-4-2, 1926-4-2 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M303A4-2?
3M303A4-2 is cataloged in the U.S. Government catalog under NSN 5325-00-326-5331. 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 — 3M303A4-2

✓ 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.