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6535-51-212-9101 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6535-51-212-9101: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, thickness: 0.090 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN, hole_diameter: 0.657 INCHES MINIMUM AND 0.663 INCHES MAXIMUM IN, surface_finish: 90.0 MICROINCHES ALL SURFACES, overall_diameter: 1.185 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN, special_features: 1 DRILLED HOLE 0.143 IN. MIN 0.147 IN.

MAX DIA 0.253 IN. MIN 0.258 IN. MAX FROM CENTER OF FLAT IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-945-8288, 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
6535-51-212-9101
NSN: 5310-00-945-8288
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
thickness0.090 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN
hole_diameter0.657 INCHES MINIMUM AND 0.663 INCHES MAXIMUM IN
surface_finish90.0 MICROINCHES ALL SURFACES
overall_diameter1.185 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN
special_features1 DRILLED HOLE 0.143 IN. MIN 0.147 IN. MAX DIA 0.253 IN. MIN 0.258 IN. MAX FROM CENTER OF FLAT IN
surface_treatmentANODIZE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleDEE
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-A-225/6 TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/4 TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625,TY 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-945-8288
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6535-51-212-9101 · 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: 90.0 MICROINCHES ALL SURFACES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 1.185 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/4 TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: ANODIZE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE FINISH90.0 MICROINCHES ALL SURFACES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER1.185 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/4 TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIAL FEATURES1 DRILLED HOLE 0.143 IN. MIN 0.147 IN. MAX DIA 0.253 IN. MIN 0.258 IN. MAX FROM CENTER OF FLAT IN
SURFACE TREATMENTANODIZE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALALUMINUM ALLOY 2024 OVERALL
CENTER HOLE SHAPE STYLEDEE
SUBSTITUTES & CROSS-REFERENCES 1
00608Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 6535-51-212-9101?
6535-51-212-9101 is a WASHER,FLAT.
What parts can replace 6535-51-212-9101?
There is 1 known substitute for 6535-51-212-9101: 00608. Substitute compatibility should be verified for your specific system.
What is the NSN for 6535-51-212-9101?
6535-51-212-9101 is cataloged in the U.S. Government catalog under NSN 5310-00-945-8288. 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.