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GR520BA1 — RECEPTACLE,TURNLOCK FASTENER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GR520BA1: RECEPTACLE,TURNLOCK FASTENER.

The RECEPTACLE,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 STUD, mounting_style: PLAIN W/MOUNTING HOLE, receptacle_width: 0.531 INCHES NOMINAL IN, features_provided: SEALING FEATURE, receptacle_height: 0.568 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE STUD. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-451-3545, 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
GR520BA1
NSN: 5325-00-451-3545
FSC: 5325 — Fastening Devices
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 STUD
mounting_stylePLAIN W/MOUNTING HOLE
receptacle_width0.531 INCHES NOMINAL IN
features_providedSEALING FEATURE
receptacle_height0.568 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE STUD
receptacle_overall_length1.030 INCHES NOMINAL IN
turnlock_mounting_hole_diameter0.093 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
material_document_and_classificationAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE STUD
surface_treatment_document_and_classificationQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE STUD
center_to_center_distance_between_mounting_holes0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
receptacle_thread_size_and_series/type_designator0.164-32 UNIFIED NATIONAL COARSE (UNC)
NSN5325-00-451-3545
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GR520BA1 · 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
•
RECEPTACLE OVERALL LENGTH: 1.030 INCHES NOMINAL IN
•
RECEPTACLE THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.164-32 UNIFIED NATIONAL COARSE (UNC)
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE STUD
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
•
MOUNTING STYLE: PLAIN W/MOUNTING HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE STUD
•
FEATURES PROVIDED: SEALING FEATURE
•
RECEPTACLE WIDTH: 0.531 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
RECEPTACLE OVERALL LENGTH1.030 INCHES NOMINAL IN
RECEPTACLE THREAD SIZE AND SERIES/TYPE DESIGNATOR0.164-32 UNIFIED NATIONAL COARSE (UNC)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE STUD
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
MOUNTING STYLEPLAIN W/MOUNTING HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE STUD
FEATURES PROVIDEDSEALING FEATURE
RECEPTACLE WIDTH0.531 INCHES NOMINAL IN
TURNLOCK MOUNTING HOLE DIAMETER0.093 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE STUD
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GR520BA1?
GR520BA1 is a RECEPTACLE,TURNLOCK FASTENER.
What is the NSN for GR520BA1?
GR520BA1 is cataloged in the U.S. Government catalog under NSN 5325-00-451-3545. 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.