Washer, Flat5310-01-642-3603

NSN 5310-01-642-3603 · NIIN 016423603 · Part number W20490

Emerson Electric Co Alco Controls Div · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 70255

Government record, cited

NSN 5310-01-642-3603 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-642-3603. Manufacturer of record part number: W20490.

Also searched as 5310-01-642-3603 · 5310016423603 · NIIN 016423603 · 01-642-3603 · FSC 5310 Nuts and Washers · CAGE 70255 · W20490 · 02314-0019-0002

Nearby stock numbers ← 5310-01-642-3427 Washer, Flat · 5310-01-642-3730 Washer, Lock →

5310-01-642-3603 — Nuts and Washers

Features

Washer,flat — FSC 5310
2 manufacturer part numbers on file
Manufacturer of record: Emerson Electric Co Alco Controls Div

Identification

NSN: 5310-01-642-3603
NIIN: 016423603
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: W20490
Manufacturer: Emerson Electric Co Alco Controls Div

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-642-3603, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Emerson Electric Co Alco Controls Div. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Catalog Facts

Item Name	Washer,flat
FSC / FSG	5310 — Nuts and Washers (FSG 53)
Manufacturers	Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (CAGE 59885); Emerson Electric Co Alco Controls Div (CAGE 70255)

Technical Specifications

Parameter	Value
NSN	5310-01-642-3603
Primary Part Number	W20490
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Emerson Electric Co Alco Controls Div
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
02314-0019-0002	Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (USA)
W20490 PRIMARY	Emerson Electric Co Alco Controls Div (USA)

No interchangeability data on file.

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

5310-00-000-0040 · Item name not on file

5310-00-000-0077

NUT,PLAIN,ROUND

5310-00-000-0079

WASHER,FLAT

5310-00-000-0079

WASHER,FLAT

5310-00-000-1146

5310-00-000-1146 · Item name not on file

5310-00-000-3815

5310-00-000-3815 · Item name not on file

5310-00-000-4532

5310-00-000-4532 · Item name not on file

5310-00-000-4540

5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-642-3603?

NSN 5310-01-642-3603 is a Washer,flat, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-642-3603?

NSN 5310-01-642-3603 has 2 manufacturer part numbers on file: 02314-0019-0002 (Rosemount Aerospace Inc Dba Rosemount Aerospace Inc), W20490 (Emerson Electric Co Alco Controls Div).

Is NSN 5310-01-642-3603 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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