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GS522F1 — STUD,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GS522F1: STUD,TURNLOCK FASTENER.

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.360 INCHES MINIMUM IN, material: STEEL COMP 303 OR STEEL COMP 303SE OVERALL, drive_type: SOCKET, grip_length: 0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, extension_length: 0.175 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-905-3192, 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
GS522F1
NSN: 5325-00-905-3192
FSC: 5325 — Fastening Devices
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
diameter0.360 INCHES MINIMUM IN
materialSTEEL COMP 303 OR STEEL COMP 303SE OVERALL
drive_typeSOCKET
grip_length0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
extension_length0.175 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
securing_device_typeRING
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
material_document_and_classificationASTM A581 ASSN STD ALL MATERIAL RESPONSES OR AMS 5640 ASSN STD ALL MATERIAL RESPONSES OVERALL
NSN5325-00-905-3192
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GS522F1 · 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-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DRIVE TYPE: SOCKET
•
MATERIAL ACCOMMODATED THICKNESS: 0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
EXTENSION LENGTH: 0.175 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581 ASSN STD ALL MATERIAL RESPONSES OR AMS 5640 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
DIAMETER: 0.360 INCHES MINIMUM IN
•
SECURING DEVICE TYPE: RING
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
DRIVE TYPESOCKET
MATERIAL ACCOMMODATED THICKNESS0.156 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
TURNLOCK STUD SHANK STYLESTUD SHANK
EXTENSION LENGTH0.175 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581 ASSN STD ALL MATERIAL RESPONSES OR AMS 5640 ASSN STD ALL MATERIAL RESPONSES OVERALL
DIAMETER0.360 INCHES MINIMUM IN
SECURING DEVICE TYPERING
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
STUD SHANK MAJOR DIAMETER0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 3
CA1820-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
911536-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
G254068-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GS522F1?
GS522F1 is a STUD,TURNLOCK FASTENER.
What parts can replace GS522F1?
There are 3 known substitutes for GS522F1: CA1820-1, 911536-1, G254068-1. Substitute compatibility should be verified for your specific system.
What is the NSN for GS522F1?
GS522F1 is cataloged in the U.S. Government catalog under NSN 5325-00-905-3192. 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.