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GB500A8A — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

GB500A8A: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.615 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN, outside_diameter: 0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN, style_designator: RECESSED, surface_treatment: CADMIUM OVERALL, material_thickness: 0.170 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-038-2611, 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
GB500A8A
NSN: 5310-00-038-2611
FSC: 5310 — Nuts and Washers
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.615 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
outside_diameter0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentCADMIUM OVERALL
material_thickness0.170 INCHES NOMINAL IN
surface_treatment_document_and_classificationQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-038-2611
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GB500A8A · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
OUTSIDE DIAMETER: 0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.170 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.615 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
OUTSIDE DIAMETER0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
MATERIAL THICKNESS0.170 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.615 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
F4367-08Reference document
Same NSN cross-reference
Reference document — Secondary reference
K52300-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GB500A8A?
GB500A8A is a WASHER,RECESSED.
What parts can replace GB500A8A?
There are 2 known substitutes for GB500A8A: F4367-08, K52300-8. Substitute compatibility should be verified for your specific system.
What is the NSN for GB500A8A?
GB500A8A is cataloged in the U.S. Government catalog under NSN 5310-00-038-2611. 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.