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GR531AG420A — RETAINER,TURNLOCK FASTENER EJECT

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GR531AG420A: RETAINER,TURNLOCK FASTENER EJECT.

RETAINER,TURNLOCK FASTENER EJECT. Key specifications include material: STEEL OVERALL, eyelet_height: 0.625 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL, turnlock_eyelet_style: EYELET, eyelet_inside_diameter: 0.257 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN, distance_between_flanges: 0.056 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-069-3483, 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
GR531AG420A
NSN: 5325-01-069-3483
FSC: 5325 — Fastening Devices
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
eyelet_height0.625 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
turnlock_eyelet_styleEYELET
eyelet_inside_diameter0.257 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
distance_between_flanges0.056 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
largest_outside_diameter0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
smallest_outside_diameter0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN
material_document_and_classificationQQ-W-423,TYPE 302,COND B FED SPEC SINGLE MATERIAL RESPONSE LOCKSPRING
surface_treatment_document_and_classificationMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5325-01-069-3483
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GR531AG420A · 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
•
EYELET HEIGHT: 0.625 INCHES NOMINAL IN
•
DISTANCE BETWEEN FLANGES: 0.056 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
LARGEST OUTSIDE DIAMETER: 0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
•
TURNLOCK EYELET STYLE: EYELET
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-423,TYPE 302,COND B FED SPEC SINGLE MATERIAL RESPONSE LOCKSPRING
•
EYELET INSIDE DIAMETER: 0.257 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
•
SMALLEST OUTSIDE DIAMETER: 0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EYELET HEIGHT0.625 INCHES NOMINAL IN
DISTANCE BETWEEN FLANGES0.056 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
LARGEST OUTSIDE DIAMETER0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
TURNLOCK EYELET STYLEEYELET
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423,TYPE 302,COND B FED SPEC SINGLE MATERIAL RESPONSE LOCKSPRING
EYELET INSIDE DIAMETER0.257 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
SMALLEST OUTSIDE DIAMETER0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
6319-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GR531AG420A?
GR531AG420A is a RETAINER,TURNLOCK FASTENER EJECT.
What parts can replace GR531AG420A?
There is 1 known substitute for GR531AG420A: 6319-1. Substitute compatibility should be verified for your specific system.
What is the NSN for GR531AG420A?
GR531AG420A is cataloged in the U.S. Government catalog under NSN 5325-01-069-3483. 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.