PartsTable TECHNICAL DATA SHEET

NSN 5310-01-684-3978Government record, cited

Nut, Plain, Extended Washer, Hexago5310-01-684-3978

NSN 5310-01-684-3978 · NIIN 016843978

FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5310-01-684-3978 · 5310016843978 · NIIN 016843978 · 01-684-3978 · FSC 5310 Nuts and Washers · 3001120-120 · 3001120

Nearby stock numbers ← 5310-01-684-3955 Nut, Clip-on · 5310-01-684-4015 Nut, Plain, Extended Washer, Hexago →

5310-01-684-3978 — Nuts and Washers

Features

Nut,plain,extended Washer,hexago — FSC 5310

Identification

NSN: 5310-01-684-3978
NIIN: 016843978
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-684-3978, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Nut,plain,extended Washer,hexago
FSC / FSG	5310 — Nuts and Washers (FSG 53)

Technical Specifications

Parameter	Value
NSN	5310-01-684-3978
Item Name	Nut,plain,extended Washer,hexago
FSC / FSG	5310 / 53 — Nuts and Washers
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

⇄ Related Items 3

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

5310-01-684-61843001120-140 POSSIBLE MATCH

NUT,PLAIN,EXTENDED WASHER,HEXAGO

Possible match (shared part number)Bae Systems Land & Armaments L.p.

5310-01-684-62223001120-060 POSSIBLE MATCH

NUT,PLAIN,EXTENDED WASHER,HEXAGO

Possible match (shared part number)Bae Systems Land & Armaments L.p.

5310-01-685-76273001120-080 POSSIBLE MATCH

NUT,PLAIN,EXTENDED WASHER,HEXAGO

Possible match (shared part number)Bae Systems Land & Armaments L.p.

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
3001120-120	3/2 Design control — primary reference U.S. Government activity
3001120	D/9 Drawing number reference only U.S. Government activity

Related Parts

5310-01-684-6184POSSIBLE MATCH

NUT,PLAIN,EXTENDED WASHER,HEXAGO

3001120-140

5310-01-684-6222POSSIBLE MATCH

NUT,PLAIN,EXTENDED WASHER,HEXAGO

3001120-060

5310-01-685-7627POSSIBLE MATCH

NUT,PLAIN,EXTENDED WASHER,HEXAGO

3001120-080

Frequently Asked Questions

What is NSN 5310-01-684-3978?

NSN 5310-01-684-3978 is a Nut,plain,extended Washer,hexago, classified under FSC 5310, Nuts and Washers. Status: active.

What NSN replaces 5310-01-684-3978?

3 possible matches (shared part number, not a government interchangeability claim): 5310-01-684-6184, 5310-01-684-6222, 5310-01-685-7627. Verify interchangeability with system specifications before substitution.

Is NSN 5310-01-684-3978 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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