MS20426A8-16: NASM20426, AN426

MS20426A8-16

What it is: MS20470 solid rivet, 100-degree countersunk head, 1/4" (8/32nds in diameter) diameter, length 1.000" (16/16ths in length), not grip
Equivalents: NASM20426NASCitedIdentical, MS20426L Notice 1 (everyspec): canceled and superseded by NASM20426, part numbers not changed; also on the same NSN 5320-00-807-2259 ↗
AN426ANCitedApproved alternate, FAA AC 43.13-1B para 4-57a(4) para 4-57a(4) ↗
Install tooling, by who made the part: MS20470 solid rivet: Rivet gun and bucking bar. No tool part numbers on file for this size.Ask a tooling specialist →
The nose follows the maker, not the stock number: check the maker on the CoC or packaging.

QtyInclude install toolingI already have the riveter

Reference only: the drawing and its process spec govern. How to read this

Every size and maker in the MS20426 series →

Full detail: decode, cited documents, every stock number

MS20426 cross reference: every equivalent with its evidence, the sizes each maker lists, and what DLA paid →

MS20470 solid rivet: MS20470 rivet, solid, universal head: dimensioned rivet outline with material identification mark location. — Image: MS20470 Rev H (Rivet, Solid, Universal Head, Aluminum Alloy and Titanium Columbium Alloy), sheet 1, via EverySpec

MS20426A8-16

MS20470 solid rivet · 100° countersunk (flush) solid rivet

Head: 100-degree countersunk head
Diameter: 1/4" (8/32nds in diameter)
Grip / length: length 1.000" (16/16ths in length), not grip
Material: 1100

Numbering scheme: FAA AC 43.13-1B para 4-57a(3) ↗

Install tooling, by who made the part

MS20470 solid rivet: Rivet gun and bucking bar. No tool part numbers on file for this size.

QtyInclude install toolingI already have the riveter

The RFQ line lists the drop-in equivalents below as acceptable alternates.

Drop-in equivalents

Identical or approved-alternate part numbers, each with the document that states it.

Part number	Equivalence and source	Install tooling
NASM20426dash numbers to complete	IdenticalMS20426L Notice 1 (everyspec): canceled and superseded by NASM20426, part numbers not changed ↗MS20426L Notice 1: "The part numbers have not been changed" (example: document NASM20426, part no. MS20426). Order the MS20426 part number.NASM20426 is the superseding document, not a part number: the cited notice keeps the part number unchanged.	Cherry E-Z Buck: Rivet gun and bucking bar, or squeeze (CA-1032 "typical squeeze load" guidelines). No tool part numbers on file for this size.
AN426dash numbers to complete	Approved alternateFAA AC 43.13-1B para 4-57a(4), para 4-57a(4) ↗MS20426 supersedes AN426.Complete the dash numbers for AN426 from its document.	Not documented for this part number.

MS20426 supersedes AN426 (AC 43.13-1B para 4-57a(4)). MS20426L was canceled and superseded by the NASM20426 document with the part numbers unchanged: the part is still MS20426 (MS20426L Notice 1).

Group source: FAA AC 43.13-1B para 4-57a(4); MS20426L Notice 1 ↗

Image credits: MS20470 Rev H (Rivet, Solid, Universal Head, Aluminum Alloy and Titanium Columbium Alloy), sheet 1, via EverySpec ↗