How to read the status
Where to buySuperseded means the standard on the left was replaced by the one on the right, and new stock is ordered under the right-hand number. Adopted as NASM means the Air Force-Navy MS standard was cancelled and re-issued as a NASM standard of the same number; the notices say what changed, if anything.
The right-hand column does not say the parts are interchangeable on your aircraft. Where the drawing, IPC or SRM names a part number, that number governs. The decoder takes the old number you hold and shows the current one, the size, and the data sheet.
Solid rivets
| Old number | Current number | Status | Try in the decoder | Source |
|---|---|---|---|---|
| AN470 | MS20470 | Superseded | AN470AD4-6 | MS20470H note 2 (p. 2); AC 43.13-1B 4-57a(4), 7-1a |
| AN426 | MS20426 | Superseded | AN426AD4-6 | MS20426L note 2 (p. 2); AC 43.13-1B 4-57a(4), 7-1e |
| MS20426 | NASM20426 | Cancelled, adopted as NASM; part numbers identical | MS20426AD4-6 | MS20426L Notice 1 (18 Aug 1998) |
Washers
| Old number | Current number | Status | Try in the decoder | Source |
|---|---|---|---|---|
| AN960 | NAS1149 | Cancelled; the notice has a substitution table | AN960-416 | AN960 Rev. 21 Notice 1 (16 Sep 2011) |
| AN970 | NASM970 | Cancelled; identical item | AN970 | AN970 Rev. 6 Notice 4 (28 Jul 1999) |
| AN935 | MS35338 | Superseded | AN935-10 | EverySpec washer AN935 listing |
| MS35338 | NASM35338 | Superseded by NASM | MS35338-44 | EverySpec washer MS35337 thru MS35340 listing |
| MS15795 | NASM15795 | Superseded by NASM | MS15795-603 | EverySpec washer MS15795 listing |
Nuts, cotter pins and clevis pins
| Old number | Current number | Status | Try in the decoder | Source |
|---|---|---|---|---|
| AN365 | MS20365 | Superseded | AN365-1032 | EverySpec nut listing MS21042 thru MS21046 |
| MS20365 | MS21042 | Superseded | MS20365-440 | EverySpec nut listing MS20364 and MS20365 |
| MS20364 | MS21083 | Superseded | MS21083N06 | EverySpec nut listing MS20364 and MS20365 |
| MS21042 | NASM21042 | Superseded by NASM | MS21042L08 | EverySpec nut listing MS21042 thru MS21046 |
| AN380 | MS24665 | Superseded | AN380-2-2 | AN380 Rev. 7 Notice 1 (1 Aug 1968) |
| MS24665 | NASM24665 | Superseded by NASM | MS24665-283 | MS24665F Notice 2 (30 Nov 1998) |
| AN392 | MS20392 | Superseded | AN392-11 | EverySpec pin listing AN392 thru AN406 |
| AN995 | NASM20995 | Superseded (adoption notice) | MS20995C32 | NASM20995 adoption notice (30 Apr 1998) |
Screws
| Old number | Current number | Status | Try in the decoder | Source |
|---|---|---|---|---|
| AN505 | MS35190 | Superseded | AN505-10-10 | AN505 Rev. 7, sheet 4 |
| AN510 | MS35191 | Superseded | AN510-0-2 | MS35191G, Table II |
| AN515 | MS35206 | Superseded | AN515-10-10 | MS35206H, Table III |
| AN520 | MS51958 | Superseded | AN520C10-10 | MS51958C, interchangeability table |
| AN507 | MS24693 | Superseded | AN507-1032R10 | EverySpec screw AN507 listing |
| AN509 | MS24694 | Superseded | AN509-10R10 | MS24694C, Table IV |
| AN530 | MS51861 | Superseded | AN530C10-10 | MS51861A, Table III |
Worked example
The kit list says AN960-416 and the stockroom only has NAS1149 washers.
- Find AN960 in the washers table: cancelled, replaced by NAS1149.
- Type AN960-416 in the decoder: it gives the NAS1149 number for that size and finish, from the notice's substitution table.
- Check the drawing or IPC allows the NAS part, then order from the catalog.
Order the NAS1149 number the decoder shows, after the drawing check.
Questions people actually ask
Is MS20470 the same as NAS1097?
No. MS20470 has a universal head and NAS1097 a 100° reduced countersunk head. A countersunk MS rivet is MS20426, and NAS1097 is a separate standard (AC 43.13-1B Table 7-10).
Does "superseded" mean I can swap without checking?
No. The notice says what replaced what. Whether your aircraft accepts it depends on its drawing, IPC or SRM.
Why are distributor equivalents missing?
Only standards, notices and listings are used here. Distributor and NSN equivalents are in the data sheets, labelled by level.
Limits — when NOT to use this chart
What the sources support, and no further.
- Common crosses only. Other series are in the data sheets; the AN3 to NASM3 bolt series is not covered here.
- Status as of the notice or listing cited. A later revision may change it. Check the current issue.
- The SRM and IPC govern where they name a part number.
Where to buy
Distributors coming soon.
Sources
- FAA AC 43.13-1B CHG 1, Chapter 4 par. 4-57 and Chapter 7 par. 7-1 — AN470 and AN426 superseded by MS20470 and MS20426; NAS1097 in Table 7-10.
- MS20470H and MS20426L with Notice 1; AN960 Rev. 21 Notice 1; AN970 Rev. 6 Notice 4; MS24665F Notice 2; NASM20995 adoption notice — Cancellation and adoption notices, as hosted on EverySpec (public documents).
- Screw standards MS35190, MS35191G, MS35206H, MS51958C, MS24694C, MS51861A and AN505 Rev. 7 — Interchangeability tables and supersession notes, per row above.