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K6231 — WASHER,SHOULDERED AND RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K6231: WASHER,SHOULDERED AND RECESSED.

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_angle: 45.0 DEGREES NOMINAL, hole_diameter: 0.386 INCHES NOMINAL IN, surface_finish: 100.0 MICROINCHES ALL SURFACES, recess_diameter: 0.480 INCHES NOMINAL IN, shoulder_height: 0.080 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-213-9133, 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
K6231
NSN: 5310-00-213-9133
FSC: 5310 — Nuts and Washers
CAGE: 12736 — CLAYTON MANUFACTURING COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
recess_angle45.0 DEGREES NOMINAL
hole_diameter0.386 INCHES NOMINAL IN
surface_finish100.0 MICROINCHES ALL SURFACES
recess_diameter0.480 INCHES NOMINAL IN
shoulder_height0.080 INCHES NOMINAL IN
outside_diameter2.190 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter0.562 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
material_thickness0.250 INCHES NOMINAL IN
NSN5310-00-213-9133
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K6231 · 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 FINISH: 100.0 MICROINCHES ALL SURFACES
•
SHOULDER HEIGHT: 0.080 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
OUTSIDE DIAMETER: 2.190 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.562 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.480 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH100.0 MICROINCHES ALL SURFACES
SHOULDER HEIGHT0.080 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED AND RECESSED
OUTSIDE DIAMETER2.190 INCHES NOMINAL IN
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
SHOULDER DIAMETER0.562 INCHES NOMINAL IN
RECESS DIAMETER0.480 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.386 INCHES NOMINAL 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is K6231?
K6231 is a WASHER,SHOULDERED AND RECESSED.
What is the NSN for K6231?
K6231 is cataloged in the U.S. Government catalog under NSN 5310-00-213-9133. 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.