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5021005 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

5021005: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 OVERALL, thickness: 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN, hole_diameter: 0.208 INCHES MINIMUM AND 0.223 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES TOP, overall_diameter: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-764-2429, 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
5021005
NSN: 5310-00-764-2429
FSC: 5310 — Nuts and Washers
CAGE: 001JK — EMBRAER S.A. (BRA)
SPECIFICATIONS
materialSTEEL COMP 321 OVERALL
thickness0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
hole_diameter0.208 INCHES MINIMUM AND 0.223 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES TOP
overall_diameter0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationSTRYKER
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyWASHER, FLAT
NSN5310-00-764-2429
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5021005 · 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: 63.0 MICROINCHES BOTTOM
•
OVERALL DIAMETER: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
OVERALL DIAMETER0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER, FLAT
END ITEM IDENTIFICATIONSTRYKER
MATERIALSTEEL COMP 321 OVERALL
SUBSTITUTES & CROSS-REFERENCES 5
968.20.11.763Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS9321-09Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AS9321Reference document
Same NSN cross-reference
Reference document — Secondary reference
PWA53425-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
5310PL0742183Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5021005?
5021005 is a WASHER,FLAT.
What parts can replace 5021005?
There are 5 known substitutes for 5021005: 968.20.11.763, MS9321-09, AS9321 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5021005?
5021005 is cataloged in the U.S. Government catalog under NSN 5310-00-764-2429. 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.