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91090A106 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91090A106: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.056 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN, hole_diameter: 0.266 INCHES NOMINAL IN, overall_diameter: 0.562 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL, peripheral_shape_style: ROUND, supplementary_features: MATERIAL-STEEL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-553-5162, 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
91090A106
NSN: 5310-01-553-5162
NIINs: 015535162, 015804302
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
thickness0.056 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
hole_diameter0.266 INCHES NOMINAL IN
overall_diameter0.562 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
peripheral_shape_styleROUND
supplementary_featuresMATERIAL-STEEL
center_hole_shape_styleROUND
end_item_identification2410-01-538-6780, TRACTOR,FULL TRACKED,LOW SPEED
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyLARGE-OD ZINC-PLATED STEEL FLAT WASHER
NSN5310-01-553-5162
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91090A106 · 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
•
OVERALL DIAMETER: 0.562 INCHES NOMINAL IN
•
SUPPLEMENTARY FEATURES: MATERIAL-STEEL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: ZINC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.562 INCHES NOMINAL IN
SUPPLEMENTARY FEATURESMATERIAL-STEEL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTZINC OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYLARGE-OD ZINC-PLATED STEEL FLAT WASHER
END ITEM IDENTIFICATION2410-01-538-6780, TRACTOR,FULL TRACKED,LOW SPEED
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.266 INCHES NOMINAL IN
THICKNESS0.056 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 91090A106?
91090A106 is a WASHER,FLAT.
What is the NSN for 91090A106?
91090A106 is cataloged in the U.S. Government catalog under NSN 5310-01-553-5162. 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.