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F-640 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

F-640: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.687 INCHES NOMINAL IN, material: STEEL OVERALL, drive_type: SLOTTED, grip_length: 0.400 INCHES NOMINAL IN, shank_neck_length: 0.234 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-449-3133, 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
F-640
NSN: 5325-00-449-3133
NIINs: 004493133, 013784532
FSC: 5325 — Fastening Devices
CAGE: 72794 — SOUTHCO INC (USA)
SPECIFICATIONS
diameter0.687 INCHES NOMINAL IN
materialSTEEL OVERALL
drive_typeSLOTTED
grip_length0.400 INCHES NOMINAL IN
shank_neck_length0.234 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.375 INCHES NOMINAL IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.310 INCHES NOMINAL IN
general_characteristics_item_descriptionUSED FOR FIBER OPTIC CABLE PULLING, TRANSPARENT, ORANGE COLORED, STRINGY LIQUID WITH ON ODOR, 10000 CP BROOKFIELD RVT VISCOMETER SPINDLE NO. 3, 5 RPM, PACKING 5 GAL PAIL RPM
NSN5325-00-449-3133
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: F-640 · 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
•
DRIVE TYPE: SLOTTED
•
MATERIAL ACCOMMODATED THICKNESS: 0.310 INCHES NOMINAL IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
DIAMETER: 0.687 INCHES NOMINAL IN
•
SHANK NECK LENGTH: 0.234 INCHES NOMINAL IN
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
STUD SHANK MAJOR DIAMETER: 0.375 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
DRIVE TYPESLOTTED
MATERIAL ACCOMMODATED THICKNESS0.310 INCHES NOMINAL IN
TURNLOCK STUD SHANK STYLESTUD SHANK
DIAMETER0.687 INCHES NOMINAL IN
SHANK NECK LENGTH0.234 INCHES NOMINAL IN
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
STUD SHANK MAJOR DIAMETER0.375 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
GRIP LENGTH0.400 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is F-640?
F-640 is a STUD,TURNLOCK FASTENER.
What is the NSN for F-640?
F-640 is cataloged in the U.S. Government catalog under NSN 5325-00-449-3133. 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.