AN380, AN381, MS24665 Cotter Pins
AN380 cotter pins are cad plated steel, AN381 cotter pins are stainless steel. MS24665 is the current number to replace AN380 and AN381. MS24665 also has brass and nickel copper alloy versions, which will not be discussed here.
Current spec: NASM 24665 (still uses MS24665 for part number)
Table below lists the most common cotter pins for the AN310 and AN320 castle nuts commonly used.
Nut size
|
Steel |
Stainless Steel |
|
||
Old number |
New number |
Old number |
New number |
Size |
|
AN310-3 (#10 3/16”) |
AN380-2-2 |
MS24665-132 |
AN381-2-8 |
MS24665-151 |
1/16”x1/2” |
AN310-4 (1/4”) |
AN380-2-2 |
MS24665-132 |
AN381-2-8 |
MS24665-151 |
1/16”x1/2” |
AN310-5 (5/16”) |
AN380-2-2 |
MS24665-132 |
AN381-2-8 |
MS24665-151 |
1/16”x1/2” |
AN310-6 (3/8”) |
AN380-3-3 |
MS24665-283 |
AN381-3-12 |
MS24665-300 |
3/32”x3/4” |
AN310-7 (7/16”) |
AN380-3-3 |
MS24665-283 |
AN381-3-12 |
MS24665-300 |
3/32”x3/4” |
AN310-8 (1/2”) |
AN380-3-3 |
MS24665-283 |
AN381-3-12 |
MS24665-300 |
3/32”x3/4” |
AN310-9 (9/16”) |
AN380-4-4 |
MS24665-353 |
AN381-4-16 |
MS24665-370 |
1/8”x1” |
AN310-10 (5/8”) |
AN380-4-4 |
MS24665-353 |
AN381-4-16 |
MS24665-370 |
1/8”x1” |
AN310-12 (3/4”) |
AN380-4-5 |
MS24665-355 |
AN381-4-20 |
MS24665-372 |
1/8”x1 1/4” |
