PartsTable
Technical Data Sheet
Download PDF

2645377-4 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2645377-4: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 2.110 INCHES NOMINAL IN, stud_head_height: 0.330 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, width_across_flats: 0.564 INCHES MAXIMUM IN, securing_device_type: SPRING. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-349-9852, 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
2645377-4
NSN: 5325-01-349-9852
FSC: 5325 — Fastening Devices
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
grip_length2.110 INCHES NOMINAL IN
stud_head_height0.330 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.564 INCHES MAXIMUM IN
securing_device_typeSPRING
extended_washer_diameter0.770 INCHES MAXIMUM IN
turnlock_stud_head_styleSTUD HEAD
stud_shank_major_diameter0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness2.110 INCHES NOMINAL IN
NSN5325-01-349-9852
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2645377-4 · 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
•
WIDTH ACROSS FLATS: 0.564 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 0.770 INCHES MAXIMUM IN
•
MATERIAL ACCOMMODATED THICKNESS: 2.110 INCHES NOMINAL IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
STUD HEAD HEIGHT: 0.330 INCHES MAXIMUM IN
•
SECURING DEVICE TYPE: SPRING
•
TURNLOCK STUD HEAD STYLE: STUD HEAD
•
STUD SHANK MAJOR DIAMETER: 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.564 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER0.770 INCHES MAXIMUM IN
MATERIAL ACCOMMODATED THICKNESS2.110 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
STUD HEAD HEIGHT0.330 INCHES MAXIMUM IN
SECURING DEVICE TYPESPRING
TURNLOCK STUD HEAD STYLESTUD HEAD
STUD SHANK MAJOR DIAMETER0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIALSTEEL 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

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
Ready to buy 2645377-4?
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 2645377-4?
2645377-4 is a STUD,TURNLOCK FASTENER.
What is the NSN for 2645377-4?
2645377-4 is cataloged in the U.S. Government catalog under NSN 5325-01-349-9852. 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 — 2645377-4

✓ 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.