AN426B4-12: MS20426, NASM20426, MS20426B4-12

AN426B4-12

What it is: MS20470 solid rivet, 100-degree countersunk head, 1/8" (4/32nds in diameter) diameter, length 0.750" (12/16ths in length), not grip
Equivalents: MS20426MSCitedApproved alternate, FAA AC 43.13-1B para 4-57a(4) para 4-57a(4) ↗
NASM20426NASCitedApproved alternate, MS20426L Notice 1 (everyspec): canceled and superseded by NASM20426, part numbers not changed ↗
MS20426B4-12MSCatalog onlySame NSN 5320-00-119-6811 (government catalog). Not a maker's approval: confirm on the drawing.
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 AN426B series →

Full detail: decode, cited documents, every stock number

AN426B 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

AN426B4-12

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

Head: 100-degree countersunk head
Diameter: 1/8" (4/32nds in diameter)
Grip / length: length 0.750" (12/16ths in length), not grip
Material: 5056

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
MS20426dash 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 MS20426 from its document.	MS20470 solid rivet: Rivet gun and bucking bar. No tool part numbers on file for this size.
NASM20426dash numbers to complete	Approved alternateFAA AC 43.13-1B para 4-57a(4), para 4-57a(4) ↗MS20426L Notice 1 (everyspec): canceled and superseded by NASM20426, part numbers not changed ↗MS20426 supersedes AN426.MS20426L Notice 1: "The part numbers have not been changed" (example: document NASM20426, part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.

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 ↗