07-26-2017, 07:48 AM
I have seen an actual display of bolts made like this. Advertising for a hardware distributor.
This has been around for many years. Dad gave me a hand drawn copy back when I was in high school, so sometime in the mid 1970's.
This has been around for many years. Dad gave me a hand drawn copy back when I was in high school, so sometime in the mid 1970's.
Full of ideas, but slow to produce parts