F940

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F940
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5310 Nuts and Washers
National Stock Number
5310-00-353-2172
Item Name Code
01857
Assigment Date
01/01/1961 (65 years ago)

A nut, flat on top and bottom, having eight flat sides. It may include a retaining dowel pin. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance).

right-hand thread direction, 3.802 inches minimum and 3.822 inches maximum width across flats, 0.365 inches minimum and 0.385 inches maximum nut height, 3b thread class, hexagon nut style

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
Nut Style
hexagon
Nut Height
0.365 inches minimum and 0.385 inches maximum
Width Across Flats
3.802 inches minimum and 3.822 inches maximum
Thread Series
un
Thread Quantity Per Inch
16
Hardness Rating
45.0 rockwell a minimum and 55.0 rockwell a maximum
Nominal Thread Size
2.625 inches
Bearing Surface Type
chamfered
Part Name Assigned By Controlling Agency
navy special project
Special Features
one 0.300 in. to 0.310 in. hole 1.625 in. from center
Material
steel comp 1020 overall
Material Document And Classification
sae assn std single material 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
F940 Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-00-353-2172?
The FSCG of the NSN 5310-00-353-2172 is 5310
Does the NSN 5310-00-353-2172 have a Schedule B code assigned?
Yes, the Schedule B code is 7318160000
Does NSN 5310-00-353-2172 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 5310-00-353-2172 contain precious materials?
Item does not contain precious metal.
Does NSN 5310-00-353-2172 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 5310-00-353-2172 was assigned to the Federal Catalog?
It was assigned 65 years ago, on Sun, Jan 1, 1961

Professional Distribution

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