Nut, Self-Locking, Extended Washer5310-01-591-8641

NSN 5310-01-591-8641 · NIIN 015918641 · Part number 50CFN-G9

Aztech Locknut Company · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 5CQW8

Government record, cited

NSN 5310-01-591-8641 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-591-8641. Manufacturer of record part number: 50CFN-G9.

Also searched as 5310-01-591-8641 · 5310015918641 · NIIN 015918641 · 01-591-8641 · FSC 5310 Nuts and Washers · CAGE 5CQW8 · 50CFN-G9 · 92018A540

Nearby stock numbers ← 5310-01-591-8639 Nut, Self-Locking, Assembled Washe · 5310-01-591-8642 Nut, Self-Locking, Hexagon →

5310-01-591-8641 — Nuts and Washers

Features

Nut,self-Locking,extended Washer — FSC 5310
Washer Outside Diameter: 1.070 INCHES NOMINAL IN
Width Across Flats: 0.750 INCHES NOMINAL IN
Thread Series: UNIFIED NATIONAL COARSE (UNC)
Temp Rating: 250.0 FAHRENHEIT MAXIMUM DEGF
Hardness Rating: 28.0 ROCKWELL B MAXIMUM
Washer Thickness: 0.140 INCHES NOMINAL IN
Thread Direction: RIGHT-HAND

Identification

NSN: 5310-01-591-8641
NIIN: 015918641
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 50CFN-G9
Manufacturer: Aztech Locknut Company

General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-591-8641, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aztech Locknut Company. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-591-8641
Primary Part Number	50CFN-G9
Item Name	Nut,self-Locking,extended Washer
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Aztech Locknut Company
Status	ACTIVE
Washer Outside Diameter	1.070 INCHES NOMINAL IN
Width Across Flats	0.750 INCHES NOMINAL IN
Thread Series	UNIFIED NATIONAL COARSE (UNC)
Temp Rating	250.0 FAHRENHEIT MAXIMUM DEGF
Hardness Rating	28.0 ROCKWELL B MAXIMUM
Washer Thickness	0.140 INCHES NOMINAL IN
Thread Direction	RIGHT-HAND
Nominal Thread Size	0.500 INCHES IN
Surface Treatment	CHROMATE OVERALL
Nut Style	HEXAGON
Thread Class	2B
Thread Quantity Per Inch	13
Material	STEEL OVERALL
Material	PLASTIC NYLON LOCKING INSERT

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
92018A540	Mcmaster-Carr Supply Co (USA)
50CFN-G9 PRIMARY	Aztech Locknut 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 5310-01-591-8641?

NSN 5310-01-591-8641 is a Nut,self-Locking,extended Washer, manufactured by Aztech Locknut Company, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-591-8641?

NSN 5310-01-591-8641 has 2 manufacturer part numbers on file: 92018A540 (Mcmaster-Carr Supply Co), 50CFN-G9 (Aztech Locknut Company).

What are the specifications of 50CFN-G9?

Key specifications for 50CFN-G9: Overall Height: 0.563 INCHES NOMINAL IN; Washer Outside Diameter: 1.070 INCHES NOMINAL IN; Width Across Flats: 0.750 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC). 14 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-591-8641 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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