FNF-26M-720

View detailed technical data, stock status, and sourcing information for: FNF-26M-720
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-121-8207

Item Name Code

29729

Assigment Date

10/30/1968 (57 years ago)

A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.

prevailing torque all metal design locking feature, 0.830 inches maximum washer outside diameter, right-hand thread direction, 3b thread class, dry film lubricant lubrication

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Washer Outside Diameter: 0.830 inches maximum
Lubrication: dry film lubricant
Overall Height: 0.585 inches maximum
Nut Style: double hexagon
Washer Thickness: 0.037 inches minimum
Width Across Flats: 0.553 inches minimum and 0.564 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unf
Thread Quantity Per Inch: 20
Hardness Rating: 43.0 rockwell c nominal
Nominal Thread Size: 0.438 inches
Material: steel comp 8740 or steel comp h11 overall
Material Document And Classification: ams 6322 assn std 1st material response or ams6485 assn std 2nd material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416,ty 1,cl 3 fed spec single treatment response overall

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
FN26M720	Extended Washer Self-Locking Nut
FNF-26M-720	Extended Washer Self-Locking Nut
RMLH6426T070	Extended Washer Self-Locking Nut

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-00-121-8207?

The FSCG of the NSN 5310-00-121-8207 is 5310

Does the NSN 5310-00-121-8207 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-121-8207 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5310-00-121-8207 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-121-8207 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5310-00-121-8207 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Wed, Oct 30, 1968