As listed
| Field | Value |
|---|---|
| Seller | Aircraft Spruce |
| Thread | 1/4-28 |
| Material | 4037 or 8740 alloy steel (8740 most common); "C" = 431 stainless |
| Minimum tensile (listed) | 125,000 psi, as stated by Spruce |
| Plating | Cadmium, QQ-P-416A Type II Class 3 |
| Variants | Drilled or undrilled shank ("A" suffix), drilled head ("H") |
| Listing checked | 2026-09-30 |
Taken from Aircraft Spruce's product page on 2026-09-30. Where the listing does not state a figure, this table does not either.
What it is for
As with AN3, pick by grip, not overall length. Castle nut for a drilled shank: AN310.
Safety: MS24665 cotter pins.
Length and grip by dash number (as listed)
| Dash No. | Nominal Length | Grip Length |
|---|---|---|
| -3 | 15/32 | 1/16 |
| -4 | 17/32 | 1/8 |
| -5 | 21/32 | 3/16 |
| -6 | 25/32 | 5/16 |
| -7 | 29/32 | 7/16 |
| -10 | 1-1/32 | 9/16 |
| -11 | 1-5/32 | 11/16 |
| -12 | 1-9/32 | 13/16 |
| -13 | 1-13/32 | 15/16 |
| -14 | 1-17/32 | 1-1/16 |
| -15 | 1-21/32 | 1-3/16 |
| -16 | 1-25/32 | 1-5/16 |
| -17 | 1-29/32 | 1-7/16 |
| -20 | 2-1/32 | 1-9/16 |
| -21 | 2-5/32 | 1-11/16 |
| -22 | 2-9/32 | 1-13/16 |
| -23 | 2-13/32 | 1-15/16 |
| -24 | 2-17/32 | 2-1/16 |
| -25 | 2-21/32 | 2-3/16 |
| -26 | 2-25/32 | 2-5/16 |
| -27 | 2-29/32 | 2-7/16 |
| -30 | 3-1/32 | 2-9/16 |
| -31 | 3-5/32 | 2-11/16 |
| -32 | 3-9/32 | 2-13/16 |
| -33 | 3-13/32 | 2-15/16 |
| -34 | 3-17/32 | 3-1/16 |
| -35 | 3-21/32 | 3-3/16 |
| -36 | 3-25/32 | 3-5/16 |
| -37 | 3-29/32 | 3-7/16 |
| -40 | 4-1/32 | 3-9/16 |
| -41 | 4-5/32 | 3-11/16 |
| -42 | 4-9/32 | 3-13/16 |
| -43 | 4-13/32 | 3-15/16 |
| -44 | 4-17/32 | 4-1/16 |
| -45 | 4-21/32 | 4-3/16 |
| -46 | 4-25/32 | 4-5/16 |
| -47 | 4-29/32 | 4-7/16 |
| -50 | 5-1/32 | 4-9/16 |
| -51 | 5-5/32 | 4-11/16 |
| -52 | 5-9/32 | 4-13/16 |
| -53 | 5-13/32 | 4-15/16 |
| -54 | 5-17/32 | 5-1/16 |
| -55 | 5-21/32 | 5-3/16 |
| -56 | 5-25/32 | 5-5/16 |
| -57 | 5-29/32 | 5-7/16 |
| -60 | 6-1/32 | 5-9/16 |
| -61 | 6-5/32 | 5-11/16 |
| -62 | 6-9/32 | 5-13/16 |
| -64 | 6-1/2 | 6-1/16 |
| -66 | 6-25/32 | 6-5/16 |
| -72 | 7-9/32 | 6-13/16 |
As listed by Aircraft Spruce on 2026-09-30. Check the live listing before ordering: stock and part numbers change.
Where to buy
The link opens Aircraft Spruce's own page for this item, so the price and stock you see are theirs and current. We do not copy prices.
The Aviation Point links to third-party manufacturer and distributor websites. We may earn a commission on purchases made through these links, at no additional cost to you. The Aviation Point has no partnership or affiliate agreement with Aircraft Spruce, and these links carry no tracking parameters.
Sources
- Aircraft Spruce — AN4 Bolts 1/4-28 — product listing, checked 2026-09-30.