Armstrong's patent 1889 locknut locked by a cap on bolt
This image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseArmstrong's patent 1889 locknut locked by a cap on bolt
Science Museum Group
© The Board of Trustees of the Science Museum
Armstrong's patent 1889 locknut locked by a cap on bolt. Example 7/8" diam.
