AN381 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Cotter pin |
| Material | Corrosion-resistant steel |
| Status | Legacy AN designation; the listing pairs each number with an MS24665 number. Confirm the current issue before design use. |
Part numbers
Part numbers commonly stocked. The standard governs and may list others.
1/326 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-1-4 | — | MS24665-18 |
| AN381-1-8 | 1/2 | MS24665-22 |
| AN381-1-12 | 3/4 | MS24665-24 |
| AN381-1-16 | 1 | MS24665-26 |
| AN381-1-20 | 1-1/4 | MS24665-27 |
| AN381-1-24 | 1-1/2 | MS24665-28 |
3/643 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-15-8 | 1/2 | MS24665-86 |
| AN381-15-12 | 3/4 | MS24665-88 |
| AN381-15-16 | 1 | MS24665-90 |
1/1612 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-2-5 | 1/4 | MS24665-1011 |
| AN381-2-6 | 3/8 | MS24665-1012 |
| AN381-2-7 | 7/16 | MS24665-1013 |
| AN381-2-8 | 1/2 | MS24665-151 |
| AN381-2-12 | 3/4 | MS24665-153 |
| AN381-2-16 | 1 | MS24665-155 |
| AN381-2-20 | 1-1/4 | MS24665-157 |
| AN381-2-24 | 1-1/2 | MS24665-159 |
| AN381-2-28 | 1-3/4 | MS24665-161 |
| AN381-2-32 | 2 | MS24665-162 |
| AN381-2-40 | 2-1/2 | MS24665-163 |
| AN381-2-48 | 3 | MS24665-164 |
5/647 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-25-8 | 1/2 | MS24665-227 |
| AN381-25-12 | 3/4 | MS24665-229 |
| AN381-25-16 | 1 | MS24665-231 |
| AN381-25-20 | 1-1/4 | MS24665-233 |
| AN381-25-24 | 1-1/2 | MS24665-235 |
| AN381-25-28 | 1-3/4 | MS24665-237 |
| AN381-25-32 | 2 | MS24665-238 |
3/3210 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-3-8 | 1/2 | MS24665-298 |
| AN381-3-12 | 3/4 | MS24665-300 |
| AN381-3-16 | 1 | MS24665-302 |
| AN381-3-20 | 1-1/4 | MS24665-304 |
| AN381-3-24 | 1-1/2 | MS24665-306 |
| AN381-3-28 | 1-3/4 | MS24665-308 |
| AN381-3-32 | 2 | MS24665-309 |
| AN381-3-36 | 2-1/4 | MS24665-310 |
| AN381-3-40 | 2-1/2 | MS24665-311 |
| AN381-3-48 | 3 | MS24665-312 |
1/810 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-4-8 | 1/2 | MS24665-366 |
| AN381-4-12 | 3/4 | MS24665-368 |
| AN381-4-16 | 1 | MS24665-370 |
| AN381-4-20 | 1-1/4 | MS24665-372 |
| AN381-4-24 | 1-1/2 | MS24665-374 |
| AN381-4-28 | 1-3/4 | MS24665-376 |
| AN381-4-32 | 2 | MS24665-377 |
| AN381-4-36 | 2-1/4 | MS24665-378 |
| AN381-4-40 | 2-1/2 | MS24665-379 |
| AN381-4-48 | 3 | MS24665-380 |
5/329 part numbers
| Part no. | Length, in | Listed against (MS24665) |
|---|---|---|
| AN381-5-20 | 1-1/4 | MS24665-439 |
| AN381-5-24 | 1-1/2 | MS24665-441 |
| AN381-5-28 | 1-3/4 | MS24665-443 |
| AN381-5-32 | 2 | MS24665-444 |
| AN381-5-40 | 2-1/2 | MS24665-446 |
| AN381-5-44 | 2-3/4 | MS24665-447 |
| AN381-5-48 | 3 | MS24665-448 |
| AN381-5-56 | 3-1/2 | MS24665-449 |
| AN381-5-64 | 4 | MS24665-450 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | AN381-<dash> |
| Example | AN381-2-8 — 1/16 in diameter, 1/2 in long (listing row) |
Notes from the standard
- Diameter and length are those of the listing, in inches (fractions as printed). A dash in the length column means the length is not legible in the listing.
- In the listing, each row gives the number of the same diameter and length in the MS24665 and AN series, side by side.
- Use the MS24665 number for new orders where the drawing allows it.
Where to buy
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Distributors coming soon.
Sources
- AN381 — Pin, Cotter, Corrosion-Resistant Steel — nominal sizes and part numbers.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.