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PartsTable / COMPONENT / GR531AG420-2A
GR531AG420-2A ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include material: STEEL COMP 302 EJECTOR SPRING, drive_type: SOCKET, eyelet_length: 0.625 INCHES NOMINAL IN, stud_head_height: 0.140 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, width_across_flats: 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-180-2296, 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
GR531AG420-2A
NSN: 5325-01-180-2296
FSC: 5325
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 302 EJECTOR SPRING
drive_typeSOCKET
eyelet_length0.625 INCHES NOMINAL IN
stud_head_height0.140 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
width_across_flats0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeRING
eyelet_outside_diameter0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
turnlock_stud_head_styleHEXAGON
material_accommodated_thickness0.109 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
material_document_and_classificationASTM A313 ASSN STD SINGLE MATERIAL RESPONSE EJECTOR SPRING
NSN5325-01-180-2296
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GR531AG420-2A · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A313 ASSN STD SINGLE MATERIAL RESPONSE EJECTOR SPRING
•
TURNLOCK STUD HEAD STYLE: HEXAGON
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 303 EYELET
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL ACCOMMODATED THICKNESS: 0.109 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
•
DRIVE TYPE: SOCKET
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A313 ASSN STD SINGLE MATERIAL RESPONSE EJECTOR SPRING
TURNLOCK STUD HEAD STYLEHEXAGON
MATERIALSTEEL COMP 302 OR STEEL COMP 303 EYELET
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTM A313 ASSN STD 2ND MATERIAL RESPONSE EYELET
MATERIALSTEEL CORROSION RESISTING STUD
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL ACCOMMODATED THICKNESS0.109 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
DRIVE TYPESOCKET
STUD ASSEMBLY STYLESTUD ASSEMBLY
EYELET OUTSIDE DIAMETER0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
610697Interchangeable
interchangeable cross-reference
interchangeable
900553Interchangeable
interchangeable cross-reference
interchangeable
25T819D7Interchangeable
interchangeable cross-reference
interchangeable
063984Interchangeable
interchangeable cross-reference
interchangeable
88771HInterchangeable
interchangeable cross-reference
interchangeable
6308Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GR531AG420-2A?
GR531AG420-2A is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace GR531AG420-2A?
There are 15 known substitutes for GR531AG420-2A: 610697, 900553, 25T819D7 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GR531AG420-2A?
GR531AG420-2A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-180-2296. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026