3/16 IN RAWL Expansion Bolt #2

Object/Artifact

-

Yosemite Climbing Museum

Name/Title

3/16 IN RAWL Expansion Bolt #2

Entry/Object ID

2026.1.36

Description

An expansion bolt with a screw top, also called split shank bolt. Only 3/16ths of an inch.

Use

Used with a hanger to attach to the rock

Context

This bolt was most likely used on the first ascent of the west face of Leaning Tower by Glen Denny, Warren Harding, and Al McDonald. The bolt is an expansion bolt with a screw top, made by RAWL industries. At the time, standard bolts were at least 1/4 inch, but interestingly these are only 3/16ths of an inch. This route was the only place in Yosemite that 3/16 bolts were documented being placed.

Collection

Yosemite Climbing Museum Permanent Collection

Category

Climbing Hardware, Bolts/Hangers

Acquisition

Accession

2026.1

Notes

Acquired from Peggy Denny in 2022

Made/Created

Artist

Rawl

Notes

circa 1960s

Dimensions

Dimension Description

need dimensions

Material

steel

Location

Location

Display Case

Exhibit Case 09

Date

January 22, 2026

Web Links and URLs

https://vimeo.com/1164769229/57b53011ac

Provenance

Provenance Detail

Glen Denny

Notes

Gifted by Peggy Denny to Ken Yager in 2022

General Notes

Note Type

Cataloging Note

Note

Caption in the museum is: "Rurps, hook, Crack Tacks and two 3/16” compression bolts. These were saved together by Glen Denny and believed to have been used on the first ascent of the Leaning Tower West Face Route done with Warren Harding and Al McDonald in 1961."

Create Date

January 21, 2026

Update Date

February 13, 2026