PartsTable TECHNICAL DATA SHEET

NSN 5310-01-640-6350Government record, cited

Nut, Plain, Hexagon5310-01-640-6350

NSN 5310-01-640-6350 · NIIN 016406350 · Part number 2K1-25

Metrex Valve Corp. Dba Metrex Valve Corp · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 21013

Government record, cited

NSN 5310-01-640-6350 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-640-6350. Manufacturer of record part number: 2K1-25.

Also searched as 5310-01-640-6350 · 5310016406350 · NIIN 016406350 · 01-640-6350 · FSC 5310 Nuts and Washers · CAGE 21013 · 2K1-25 · EAM-1016NF2-3W

Nearby stock numbers ← 5310-01-640-6269 Washer, Flat · 5310-01-640-6379 Nut, Self-Locking, Hexagon →

5310-01-640-6350 — Nuts and Washers

Features

Nut,plain,hexagon — FSC 5310
1 manufacturer part number on file
Manufacturer of record: Metrex Valve Corp. Dba Metrex Valve Corp

Identification

NSN: 5310-01-640-6350
NIIN: 016406350
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 2K1-25
Manufacturer: Metrex Valve Corp. Dba Metrex Valve Corp

General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-640-6350, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metrex Valve Corp. Dba Metrex Valve Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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,hexagon
FSC / FSG	5310 — Nuts and Washers (FSG 53)
Manufacturers	Metrex Valve Corp. Dba Metrex Valve Corp (CAGE 21013)

Technical Specifications

Parameter	Value
NSN	5310-01-640-6350
Primary Part Number	2K1-25
Item Name	Nut,plain,hexagon
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Metrex Valve Corp. Dba Metrex Valve Corp
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 4

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

5306-01-640-70521K2-71S POSSIBLE MATCH

BOLT,MACHINE

Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp

5360-01-640-87709M-19X POSSIBLE MATCH

SPRING,FLAT

Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp

5307-01-643-69151K5-26 POSSIBLE MATCH

STUD,CONTINUOUS THREAD

Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp

4820-01-660-1461 POSSIBLE MATCH

VALVE,CONTROL

Possible match (shared part number)

Cross-Reference Index

Part Number	Manufacturer
2K1-25 PRIMARY	Metrex Valve Corp. Dba Metrex Valve Corp (USA)

Reference documents

Reference	Meaning
EAM-1016NF2-3W	D/9 Drawing number reference only Metrex Valve Corp. Dba Metrex Valve Corp

Related Parts

5306-01-640-7052POSSIBLE MATCH

BOLT,MACHINE

1K2-71S

5360-01-640-8770POSSIBLE MATCH

SPRING,FLAT

9M-19X

5307-01-643-6915POSSIBLE MATCH

STUD,CONTINUOUS THREAD

1K5-26

4820-01-660-1461POSSIBLE MATCH

VALVE,CONTROL

Frequently Asked Questions

What is NSN 5310-01-640-6350?

NSN 5310-01-640-6350 is a Nut,plain,hexagon, manufactured by Metrex Valve Corp. Dba Metrex Valve Corp, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-640-6350?

NSN 5310-01-640-6350 has 1 manufacturer part number on file: 2K1-25 (Metrex Valve Corp. Dba Metrex Valve Corp).

What NSN replaces 5310-01-640-6350?

4 possible matches (shared part number, not a government interchangeability claim): 5306-01-640-7052, 5360-01-640-8770, 5307-01-643-6915. Verify interchangeability with system specifications before substitution.

Is NSN 5310-01-640-6350 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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