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AU27AR301 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AU27AR301: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, hole_diameter: 0.513 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.880 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN, style_designator: FLAT EXTERNAL TEETH, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-655-6151, 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
AU27AR301
NSN: 5310-00-655-6151
FSC: 5310 — Nuts and Washers
CAGE: 10855 — CARRIER CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_diameter0.513 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
outside_diameter0.880 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
style_designatorFLAT EXTERNAL TEETH
surface_treatmentPASSIVATE OVERALL
material_thickness0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
end_item_identificationA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-P-35,TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-655-6151
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AU27AR301 · 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: QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-P-35,TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.880 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-P-35,TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORFLAT EXTERNAL TEETH
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.880 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
MATERIAL THICKNESS0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
END ITEM IDENTIFICATIONA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
MATERIALSTEEL COMP 410 OVERALL
HOLE DIAMETER0.513 INCHES MINIMUM AND 0.530 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 5
AU27AR301-10855Reference document
Same NSN cross-reference
Reference document — Secondary reference
0740796Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FF-W-100Reference document
Same NSN cross-reference
Reference document — Identification reference
MS35335-65Reference document
Same NSN cross-reference
Reference document — Secondary reference
824636-11Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AU27AR301?
AU27AR301 is a WASHER,LOCK.
What parts can replace AU27AR301?
There are 5 known substitutes for AU27AR301: AU27AR301-10855, 0740796, FF-W-100 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AU27AR301?
AU27AR301 is cataloged in the U.S. Government catalog under NSN 5310-00-655-6151. 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.