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Aircraft Jet Nuts


Aircraft Fasteners stocks a broad range of aircraft jet nuts used in the aircraft, aerospace, electronics and defense industries. Our jet nut inventory includes many hard to find sizes from the industry leading suppliers such as Alcoa Republic. Please give us a call and let us help you with all of your aircraft jet nut needs. 

"Jet" nuts, also “Kay” nuts or K-Nuts, are hex locknuts commonly used aerospace offering high strength, light weight and temperature resistance. These nuts feature a ring base, a reduced hex head, are self locking and are made of corrosion resistant steel. "Kay" nuts or "Jet" nuts are a good combination of high strength (160,000 psi tensile), light weight and temperature resistance (to 450°). Jet nuts have a ring base for positive seating, a reduced hex for better wrench access, are self locking and are made of corrosion resistant steel.

It has a flange on one end of the nut, the hex is smaller than a standard sized hex nut, and it is shorter than a standard hex nut. It achieves its locking action by using an elliptical offset on the un-flanged end of the nut. (http://en.wikipedia.org/wiki/Jet_nut)
Aircraft Fasteners stocks a broad range of aircraft jet nuts used in the aircraft, aerospace, electronics and defense industries. Our jet nut inventory includes many hard to find sizes from the industry leading suppliers such as Alcoa Republic.

 Jet Nuts in the MS21042 series are all-metal, self-locking nuts. Because of their reduced hex dimension, they are widely used in limited space applications where wrench access can be a problem.
Examples of Aircraft Fastener inventory for Jet Nuts / Solid Nuts
MS21042-06        Kay Nut or Jet Nut, 6-32 Thread
MS 21042-08       Kay Nut or Jet Nut, 8-32 Thread
MS 21042-3         Kay Nut or Jet Nut, 10-32 Thread
MS 21042-4         Kay Nut or Jet Nut, 1/4-28 Thread
MS 21042-5         Kay Nut or Jet Nut, 5/16-24 Thread
MS 21042-6         Kay Nut or Jet Nut, 3/8-24 Thread
MS 21042L04      Kay Nut or Jet Nut, 4-40 Thread

MS21042 JET NUT SPECIFICATIONS

Dash No.

Thread

Hex Size*

Outside Diameter of Jet Nut

Jet Nut Height
(Max)

06

6-32

3/16"

0.244"

0.141"

08

8-32

7/32"

0.290"

0.188"

3

10-32

1/4"

0.330"

0.188"

4

1/4-28

5/16"

0.420"

0.219"

5

5/16-24

3/8"

0.520"

0.266"

6

3/8-24

7/16"

0.620"

0.282"

7

7/16-20

1/2"

0.708"

0.328"

8

1/2-20

9/16"

0.814"

0.410"

10

5/8-18

3/4"

1.014"

0.550"

* The hex is typically deformed to produce the self-locking action. An unused nut
may appear to have one hex dimension smaller than the others before installation.

Please give us a call and let us help you with all of your aircraft jet nut needs.

We are authorized distributors for the premier manufacturers of these products, including Alcoa Republic and Greer. Please Contact Us for availability.


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