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6820588 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6820588: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.196 INCHES MINIMUM AND 0.216 INCHES MAXIMUM IN, heat_treatment: AS FABRICATED, hardness_rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM, outside_diameter: 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN, surface_treatment: OXIDE FILM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-925-7083, 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
6820588
NSN: 5310-00-925-7083
FSC: 5310 — Nuts and Washers
CAGE: 63005 — ROLLS-ROYCE CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.196 INCHES MINIMUM AND 0.216 INCHES MAXIMUM IN
heat_treatmentAS FABRICATED
hardness_rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
outside_diameter0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
surface_treatmentOXIDE FILM OVERALL
material_thickness0.052 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
external_keyway_width0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
external_keyway_length0.120 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
material_document_and_classificationAMS6357 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6350 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6358 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-925-7083
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6820588 · 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
•
EXTERNAL KEYWAY WIDTH: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
HEAT TREATMENT: AS FABRICATED
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS6357 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6350 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6358 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.052 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
SURFACE TREATMENT: OXIDE FILM OVERALL
TECHNICAL CHARACTERISTICS
EXTERNAL KEYWAY WIDTH0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HEAT TREATMENTAS FABRICATED
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS6357 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6350 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6358 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
MATERIAL THICKNESS0.052 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
SURFACE TREATMENTOXIDE FILM OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.196 INCHES MINIMUM AND 0.216 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 6820588?
6820588 is a WASHER,KEYWAY.
What is the NSN for 6820588?
6820588 is cataloged in the U.S. Government catalog under NSN 5310-00-925-7083. 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.