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135B6130 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

135B6130: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, hole_diameter: 1.250 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN, heat_treatment: AS FABRICATED, outside_diameter: 3.970 INCHES MINIMUM AND 4.030 INCHES MAXIMUM IN, style_designator: RECESSED BOTH SIDES, top_recess_angle: 90.0 DEGREES NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-066-9409, 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
135B6130
NSN: 5310-00-066-9409
FSC: 5310 — Nuts and Washers
CAGE: 05606 — GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
hole_diameter1.250 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN
heat_treatmentAS FABRICATED
outside_diameter3.970 INCHES MINIMUM AND 4.030 INCHES MAXIMUM IN
style_designatorRECESSED BOTH SIDES
top_recess_angle90.0 DEGREES NOMINAL
surface_treatmentOXIDE FILM OVERALL
material_thickness0.520 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN
bottom_recess_angle90.0 DEGREES NOMINAL
top_recess_diameter1.375 INCHES NOMINAL IN
bottom_recess_diameter1.375 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-066-9409
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 135B6130 · 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: 1.375 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL
•
BOTTOM RECESS DIAMETER: 1.375 INCHES NOMINAL IN
•
HEAT TREATMENT: AS FABRICATED
•
TOP RECESS ANGLE: 90.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
•
OUTSIDE DIAMETER: 3.970 INCHES MINIMUM AND 4.030 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.520 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
TOP RECESS DIAMETER1.375 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL
BOTTOM RECESS DIAMETER1.375 INCHES NOMINAL IN
HEAT TREATMENTAS FABRICATED
TOP RECESS ANGLE90.0 DEGREES NOMINAL
STYLE DESIGNATORRECESSED BOTH SIDES
OUTSIDE DIAMETER3.970 INCHES MINIMUM AND 4.030 INCHES MAXIMUM IN
MATERIAL THICKNESS0.520 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN
BOTTOM RECESS ANGLE90.0 DEGREES NOMINAL
SURFACE TREATMENTOXIDE FILM OVERALL
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 135B6130?
135B6130 is a WASHER,RECESSED.
What is the NSN for 135B6130?
135B6130 is cataloged in the U.S. Government catalog under NSN 5310-00-066-9409. 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.