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3C4066P03 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3C4066P03: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.750 INCHES NOMINAL IN, material: STEEL COMP 4130 OR STEEL COMP 4142 OVERALL, grip_length: 3.360 INCHES NOMINAL IN, extension_length: 0.320 INCHES NOMINAL IN, stud_head_height: 0.250 INCHES NOMINAL IN, turnlock_stud_head_style: KNURLED. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-412-6401, 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
3C4066P03
NSN: 5325-01-412-6401
FSC: 5325 — Fastening Devices
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
diameter0.750 INCHES NOMINAL IN
materialSTEEL COMP 4130 OR STEEL COMP 4142 OVERALL
grip_length3.360 INCHES NOMINAL IN
extension_length0.320 INCHES NOMINAL IN
stud_head_height0.250 INCHES NOMINAL IN
turnlock_stud_head_styleKNURLED
stud_shank_major_diameter0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
stud_thread_size_and_series/type_designator0.250-20 UNIFIED NATIONAL COARSE (UNC)
NSN5325-01-412-6401
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3C4066P03 · 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
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
EXTENSION LENGTH: 0.320 INCHES NOMINAL IN
•
DIAMETER: 0.750 INCHES NOMINAL IN
•
STUD HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: KNURLED
•
STUD SHANK MAJOR DIAMETER: 0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4130 OR STEEL COMP 4142 OVERALL
•
STUD THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.250-20 UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
TURNLOCK STUD SHANK STYLESTUD SHANK
EXTENSION LENGTH0.320 INCHES NOMINAL IN
DIAMETER0.750 INCHES NOMINAL IN
STUD HEAD HEIGHT0.250 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEKNURLED
STUD SHANK MAJOR DIAMETER0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4130 OR STEEL COMP 4142 OVERALL
STUD THREAD SIZE AND SERIES/TYPE DESIGNATOR0.250-20 UNIFIED NATIONAL COARSE (UNC)
GRIP LENGTH3.360 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

No substitute or cross-reference records for this part.

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 3C4066P03?
3C4066P03 is a STUD,TURNLOCK FASTENER.
What is the NSN for 3C4066P03?
3C4066P03 is cataloged in the U.S. Government catalog under NSN 5325-01-412-6401. 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.