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0820-680610 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

0820-680610: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL, hole_diameter: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, hardness_rating: 38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM, outside_diameter: 0.680 INCHES MAXIMUM IN, special_features: SIZE: 3/8 (0.375 IN.) IN, style_designator: SPLIT HELICAL-RIGHT HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-637-9541, 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
0820-680610
NSN: 5310-00-637-9541
FSC: 5310 — Nuts and Washers
CAGE: 5B752 — AERO INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1060 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL
hole_diameter0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
outside_diameter0.680 INCHES MAXIMUM IN
special_featuresSIZE: 3/8 (0.375 IN.) IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentZINC OVERALL
material_thickness0.094 INCHES MINIMUM IN
end_item_identificationRG-33 MRAP VEHICLE; MRAP BUFFALO MK2A2; MRAP - COUGAR
surface_treatment_document_and_classificationASTM B633 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-637-9541
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0820-680610 · 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: ASTM B633 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.680 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.094 INCHES MINIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.680 INCHES MAXIMUM IN
MATERIAL THICKNESS0.094 INCHES MINIMUM IN
SPECIAL FEATURESSIZE: 3/8 (0.375 IN.) IN
SURFACE TREATMENTZINC OVERALL
END ITEM IDENTIFICATIONRG-33 MRAP VEHICLE; MRAP BUFFALO MK2A2; MRAP - COUGAR
MATERIALSTEEL COMP 1060 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL
HOLE DIAMETER0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 8
A86-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
993412Reference document
Same NSN cross-reference
Reference document — Secondary reference
501-061800-00Reference document
Same NSN cross-reference
Reference document — Secondary reference
R10-5.50-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
0120382Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
FF-W-84Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 0820-680610?
0820-680610 is a WASHER,LOCK.
What parts can replace 0820-680610?
There are 8 known substitutes for 0820-680610: A86-7, 993412, 501-061800-00 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0820-680610?
0820-680610 is cataloged in the U.S. Government catalog under NSN 5310-00-637-9541. 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.