Washer, Flat5310-01-131-9869

NSN 5310-01-131-9869 · NIIN 011319869 · Part number W4206

Waterous Company · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 79218

Government record, cited

NSN 5310-01-131-9869 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-131-9869. Manufacturer of record part number: W4206.

Also searched as 5310-01-131-9869 · 5310011319869 · NIIN 011319869 · 01-131-9869 · FSC 5310 Nuts and Washers · CAGE 79218 · W4206

Nearby stock numbers ← 5310-01-131-9868 Washer, Flat · 5310-01-131-9870 Washer, Flat →

5310-01-131-9869 — Nuts and Washers

Features

Washer,flat — FSC 5310
Overall Diameter: 0.375 INCHES NOMINAL IN
Peripheral Shape Style: ROUND
Material: COPPER OVERALL
1 manufacturer part number on file
Manufacturer of record: Waterous Company

Identification

NSN: 5310-01-131-9869
NIIN: 011319869
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: W4206
Manufacturer: Waterous Company

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-131-9869, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Waterous Company. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-131-9869
Primary Part Number	W4206
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Waterous Company
Status	ACTIVE
Overall Diameter	0.375 INCHES NOMINAL IN
Peripheral Shape Style	ROUND
Material	COPPER OVERALL

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
W4206 PRIMARY	Waterous Company (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 5310-01-131-9869?

NSN 5310-01-131-9869 is a Washer,flat, manufactured by Waterous Company, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-131-9869?

NSN 5310-01-131-9869 has 1 manufacturer part number on file: W4206 (Waterous Company).

What are the specifications of W4206?

Key specifications for W4206: Overall Diameter: 0.375 INCHES NOMINAL IN; Peripheral Shape Style: ROUND; Material: COPPER OVERALL. 3 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-131-9869 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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