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GS520B12-29 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GS520B12-29: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, material: STEEL COMP 2317 OR STEEL COMP 8620 OVERALL, drive_type: SLOTTED, grip_length: 0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN, shank_neck_length: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-516-3175, 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
GS520B12-29
NSN: 5325-01-516-3175
FSC: 5325 — Fastening Devices
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
diameter0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
materialSTEEL COMP 2317 OR STEEL COMP 8620 OVERALL
drive_typeSLOTTED
grip_length0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN
shank_neck_length0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
turnlock_stud_head_styleFILLISTER
stud_shank_major_diameter0.369 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_document_and_classificationSAE J778-2317 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 8620 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-01-516-3175
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GS520B12-29 · 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, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DRIVE TYPE: SLOTTED
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J778-2317 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 8620 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
SHANK NECK LENGTH: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
TURNLOCK STUD HEAD STYLE: FILLISTER
•
STUD SHANK MAJOR DIAMETER: 0.369 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
DRIVE TYPESLOTTED
TURNLOCK STUD SHANK STYLESTUD SHANK
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J778-2317 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 8620 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
SHANK NECK LENGTH0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLEFILLISTER
STUD SHANK MAJOR DIAMETER0.369 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 2317 OR STEEL COMP 8620 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GS520B12-29?
GS520B12-29 is a STUD,TURNLOCK FASTENER.
What is the NSN for GS520B12-29?
GS520B12-29 is cataloged in the U.S. Government catalog under NSN 5325-01-516-3175. 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.