PartsTable TECHNICAL DATA SHEET

NSN 5310-01-477-6378Government record, cited

Washer, Lock5310-01-477-6378

NSN 5310-01-477-6378 · NIIN 014776378 · Part number 900305-4

Fm Af, Llc Dba American Fan Company · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 75477

Government record, cited

NSN 5310-01-477-6378 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-477-6378. Manufacturer of record part number: 900305-4.

Also searched as 5310-01-477-6378 · 5310014776378 · NIIN 014776378 · 01-477-6378 · FSC 5310 Nuts and Washers · CAGE 75477 · 900305-4 · 9W-55518-41 · 9W-55518-41

Nearby stock numbers ← 5310-01-477-6357 Washer, Flat · 5310-01-477-6382 →

5310-01-477-6378 — Nuts and Washers

Features

Washer,lock — FSC 5310
2 manufacturer part numbers on file
Manufacturer of record: Fm Af, Llc Dba American Fan Company

Identification

NSN: 5310-01-477-6378
NIIN: 014776378
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 900305-4
Manufacturer: Fm Af, Llc Dba American Fan Company

General Description

The Washer,lock, cataloged under National Stock Number 5310-01-477-6378, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fm Af, Llc Dba American Fan Company. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-477-6378
Primary Part Number	900305-4
Item Name	Washer,lock
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Fm Af, Llc Dba American Fan Company
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
900305-4	Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA)
900305-4 PRIMARY	Fm Af, Llc Dba American Fan Company (USA)

Reference documents

Reference	Meaning
9W-55518-41	5/9 Secondary reference Fm Af, Llc Dba American Fan Company
9W-55518-41	5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans

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 5310-01-477-6378?

NSN 5310-01-477-6378 is a Washer,lock, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-477-6378?

NSN 5310-01-477-6378 has 2 manufacturer part numbers on file: 900305-4 (Howden American Fan Company Dba American Fan Co Div Howden Usa Company), 900305-4 (Fm Af, Llc Dba American Fan Company).

What are the specifications of 900305-4?

Key specifications for 900305-4: Special Features: SPRING-TYPE. 0 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-477-6378 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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