Chouinard Number 7 Stopper

Object/Artifact

-

Yosemite Climbing Museum

1971 large Stopper threaded with bright green Perlon.

1971 large Stopper threaded with bright green Perlon.

Name/Title

Chouinard Number 7 Stopper

Entry/Object ID

2026.1.66

Description

An early Chouinard Equipment Stopper

Use

Passive climbing protection devices that work by wedging a tapered metal block into a constricting, narrow crack in the rock, secured by the force of a person's weight.

Context

An early edition of a Chouinard Equipment Stopper manufactured by Tom Frost and Yvon Chouinard. The early stoppers had nylon cord slung through, however it was difficult to thread the thick rope through the nut. The reason was that thicker the cord, the stronger the device was. Now stoppers are all manufactured with a swaged wire design that is stronger and easier.

Collection

Yosemite Climbing Museum Permanent Collection

Category

Climbing Hardware, Nuts/Chocks

Acquisition

Accession

2026.1

Notes

Unknown source (?)

Made/Created

Manufacturer

Chouinard Equipment

Inscription/Signature/Marks

Type

initial

Location

face of the nut

Transcription

R

Type

Makers Mark

Location

face of the nut

Transcription

C in diamond for Chouinard Equipment with a number 7

Dimensions

Dimension Description

Entire Rope length with nut

Dimension Description

Nut

Width

11/16 in

Length

1-3/16 in

Dimension Notes

width tapers to 9/16 in

Material

Nylon, Aluminum

Location

Location

Display Case

Exhibit Case 10

Date

January 29, 2026

Web Links and URLs

https://vimeo.com/1165231679/137d69ae91

General Notes

Note Type

Cataloging Note

Note

Caption in the museum is: "1971 large Stopper threaded with bright green Perlon."

Create Date

January 29, 2026

Update Date

February 16, 2026