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Part No.: AN365-Size

AN365 Nylock Hex Nut (MS20365)

These are Military specification versions of what is commonly referred to as a "Nylock" or nylon locking nut. They are rated at 125,000 psi tensile strength and for operating temperatures of up to 250° F. The AN365 series is the standard, full height lock nut. The AN365 specification is equivalent to the MS20365 and newer MS21044 specification.

AN364 Lock Nut Specifications
UNF Thread Size Wrench Size Thickness (Max) Part No.
10-32 3/8" 0.250" AN365-3
1/4-28 7/16" 0.328" AN365-4
5/16-24 1/2" 0.350" AN365-5
3/8-24 9/16" 0.469" AN365-6
7/16-20 5/8" 0.469" AN365-7
1/2-20 3/4" 0.610" AN365-8
9/16-18 7/8" 0.705" AN365-9
5/8-18 15/16" 0.766" AN365-10
3/4-16 1 1/16" 0.821" AN365-12


Reusing Nylon Locking Nuts
The FAA has issued guidelines on the reuse of nylon locking nuts. Specific recommendations have been published for larger sizes (7/16-20 and up), but the general rule is that you should not be able to turn the nut by hand once the locking insert engages the male threads. If you can turn the nut with your fingers, it must be replaced. When in doubt, replace!

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Order Qty
Part Number
Description
Price
Status

AN365-3

10-32 Nylock Hex Nut, AN365 $0.19 In Stock

AN365-4

1/4-28 Nylock Hex Nut, AN365
1 to 11: $0.49 
12 to 149: $0.43 
150 & up: $0.37 
In Stock

AN365-5

5/16-24 Nylock Hex Nut, AN365
1 to 11: $0.69 
12 to 149: $0.61 
150 & up: $0.53 
In Stock

AN365-6

3/8-24 Nylock Hex Nut, AN365
1 to 11: $0.99 
12 to 149: $0.88 
150 & up: $0.76 
In Stock

AN365-7

7/16-20 Nylock Hex Nut, AN365
1 to 9: $1.39 
10 to 99: $1.24 
100 & up: $1.08 
In Stock

AN365-8

1/2-20 Nylock Hex Nut, AN365
1 to 9: $1.79 
10 to 99: $1.59 
100 & up: $1.39 
In Stock

AN365-9

9/16-18 Nylock Hex Nut, AN365
1 to 9: $2.69 
10 to 99: $2.59 
100 & up: $2.49 
In Stock

AN365-10

5/8-18 Nylock Hex Nut, AN365
1 to 9: $2.89 
10 to 99: $2.58 
100 & up: $2.27 
In Stock

AN365-12

3/4-16 Nylock Hex Nut, AN365
1 to 7: $3.19 
8 to 59: $2.85 
60 & up: $2.51 
In Stock
     

Related products:

  Airframe (AN) & Mil-Spec (MS) Nuts

  AN and MS Nuts, AN and MS Washers, and AN Bolts

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