Washer, Flat5310-01-321-2090

NSN 5310-01-321-2090 · NIIN 013212090 · Part number 186490

Woodward, Inc. · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 31361

Government record, cited

NSN 5310-01-321-2090 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-321-2090. Manufacturer of record part number: 186490.

Also searched as 5310-01-321-2090 · 5310013212090 · NIIN 013212090 · 01-321-2090 · FSC 5310 Nuts and Washers · CAGE 31361 · 186490

Nearby stock numbers ← 5310-01-321-2068 · 5310-01-321-2091 Washer, Flat →

5310-01-321-2090 — Nuts and Washers

Features

Washer,flat — FSC 5310
1 manufacturer part number on file
Manufacturer of record: Woodward, Inc.

Identification

NSN: 5310-01-321-2090
NIIN: 013212090
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 186490
Manufacturer: Woodward, Inc.

General Description

The Washer,flat, cataloged under National Stock Number 5310-01-321-2090, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Woodward, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Washer,flat
FSC / FSG	5310 — Nuts and Washers (FSG 53)
Manufacturers	Woodward, Inc. (CAGE 31361)

Technical Specifications

Parameter	Value
NSN	5310-01-321-2090
Primary Part Number	186490
Item Name	Washer,flat
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Woodward, Inc.
Status	ACTIVE

Lifecycle & Compliance

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

⇄ Related Items 1

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5330-01-700-7312186490 POSSIBLE MATCH

GASKET

Possible match (shared part number)Yanmar America Corporation

Cross-Reference Index

Part Number	Manufacturer
186490 PRIMARY	Woodward, Inc. (USA)

Reference documents

Reference	Meaning
186490	5/9 Secondary reference Woodward, Inc. Div Fuel Systems and Controls

Related Parts

5330-01-700-7312POSSIBLE MATCH

GASKET

186490

Frequently Asked Questions

What is NSN 5310-01-321-2090?

NSN 5310-01-321-2090 is a Washer,flat, manufactured by Woodward, Inc., classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-321-2090?

NSN 5310-01-321-2090 has 1 manufacturer part number on file: 186490 (Woodward, Inc.).

What NSN replaces 5310-01-321-2090?

1 possible match (shared part number, not a government interchangeability claim): 5330-01-700-7312. Verify interchangeability with system specifications before substitution.

Is NSN 5310-01-321-2090 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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