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A02D2509-4 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A02D2509-4: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, hole_diameter: 1.135 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN, outside_diameter: 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN, style_designator: RECESSED BOTH SIDES, top_recess_angle: 90.0 DEGREES NOMINAL, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-128-8161, 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
A02D2509-4
NSN: 5310-00-128-8161
FSC: 5310 — Nuts and Washers
CAGE: 77272 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
hole_diameter1.135 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
outside_diameter1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN
style_designatorRECESSED BOTH SIDES
top_recess_angle90.0 DEGREES NOMINAL
surface_treatmentCADMIUM OVERALL
material_thickness0.205 INCHES NOMINAL IN
bottom_recess_angle90.0 DEGREES NOMINAL
top_recess_diameter1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM IN
bottom_recess_diameter1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM IN
NSN5310-00-128-8161
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A02D2509-4 · 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
•
TOP RECESS DIAMETER: 1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM IN
•
BOTTOM RECESS DIAMETER: 1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM IN
•
TOP RECESS ANGLE: 90.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
•
OUTSIDE DIAMETER: 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.205 INCHES NOMINAL IN
•
BOTTOM RECESS ANGLE: 90.0 DEGREES NOMINAL
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
TOP RECESS DIAMETER1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM IN
BOTTOM RECESS DIAMETER1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM IN
TOP RECESS ANGLE90.0 DEGREES NOMINAL
STYLE DESIGNATORRECESSED BOTH SIDES
OUTSIDE DIAMETER1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN
MATERIAL THICKNESS0.205 INCHES NOMINAL IN
BOTTOM RECESS ANGLE90.0 DEGREES NOMINAL
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 4130 OVERALL
HOLE DIAMETER1.135 INCHES MINIMUM AND 1.150 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 A02D2509-4?
A02D2509-4 is a WASHER,RECESSED.
What is the NSN for A02D2509-4?
A02D2509-4 is cataloged in the U.S. Government catalog under NSN 5310-00-128-8161. 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.