As listed
| Field | Value |
|---|---|
| Seller | Aircraft Spruce |
| Standard | AN426 (= MS20426) |
| Head | 100° countersunk |
| Types | A (1100), AD (2117-T4) |
| Sold by | Weight: 1, 1/4 or 1/8 lb |
| Part numbers | Written AN426AD-3-2 on the listing; the standard form is AN426AD3-2 |
| 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
It goes in a countersunk or dimpled hole; hole sizes on the drill chart. The countersink cages and cutters are with the tools: Wescon microstop at Yardstore.
European equivalent: LAS MS20426.
Sizes listed
| Type | Diameter | Part numbers (as Spruce writes them) | Lengths |
|---|---|---|---|
| 2117 Hard | 3/32" | AN426AD-3-2 to AN426AD-3-16 | 1/8" – 1" (13 lengths) |
| 2117 Hard | 1/8" | AN426AD-4-2 to AN426AD-4-22 | 1/8" – 1-3/8" (15 lengths) |
| 2117 Hard | 5/32" | AN426AD-5-3 to AN426AD-5-22 | 3/16" – 1-3/8" (11 lengths) |
| 2117 Hard | 3/16" | AN426AD-6-4 to AN426AD-6-14 | 1/4" – 7/8" (8 lengths) |
| 1100 Soft | 3/32" | AN426A-3-2 to AN426A-3-16 | 1/8" – 1" (11 lengths) |
| 1100 Soft | 1/8" | AN426A-4-3 to AN426A-4-20 | 3/16" – 1-1/4" (12 lengths) |
| 1100 Soft | 5/32" | AN426A-5-4 to AN426A-5-22 | 1/4" – 1-3/8" (11 lengths) |
| 1100 Soft | 3/16" | AN426A6-4 to AN426A-6-14 | 1/4" – 7/8" (6 lengths) |
Condensed from the Aircraft Spruce listing, one row per type and diameter. Spruce sells these by weight and lists the approximate count per pound for each size.
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.
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Sources
- Aircraft Spruce — Solid Aluminum Rivets - Countersunk Head - AN426 — product listing, checked 2026-09-30.