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88-20033 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

88-20033: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN, hole_diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN, overall_diameter: 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN, surface_treatment: ZINC OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-044-6477, 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
88-20033
NSN: 5310-00-044-6477
NIINs: 000446477, 011036042, 012664641, 014710633, 014710640, 014712446, 014712451, 014786340, 014786341, 014786342, 014786344, 014786346, 015316085, 015332936, 015334921, 015336741, 015719838, 015954827
FSC: 5310 — Nuts and Washers
CAGE: 30554 — DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
hole_diameter0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
overall_diameter1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
surface_treatmentZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identification6115-01-562-4616 GENERATOR SET, DIESEL ENGINE
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyWASHER, FLAT
surface_treatment_document_and_classificationASTM B633, SC 3, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-044-6477
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 88-20033 · 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: 0.995 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY SURFACE TREATMENT
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.995 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY SURFACE TREATMENT
NONDEFINITIVE SPEC/STD DATAA TYPE
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.324 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 4
88-20564-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
88-20033-25AReference document
Same NSN cross-reference
Reference document — Secondary reference
MS51412-25Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
88-20564Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 88-20033?
88-20033 is a WASHER,FLAT.
What parts can replace 88-20033?
There are 4 known substitutes for 88-20033: 88-20564-12, 88-20033-25A, MS51412-25 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 88-20033?
88-20033 is cataloged in the U.S. Government catalog under NSN 5310-00-044-6477. This indicates validated use in U.S. government and defense supply chains.
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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.