I’m sure some engineers will baulk at this, but I remember the engineers saying, at the large heavy equipment manufacturer I worked at for 37 years, the bolt hole depth needed to be at least twice the bolt diameter to get the proper torqued stretch. Beyond that didn’t add any holding power.


1957 Chevy 3200
Daily Driver
PS, A/C, Tilt column, Rebuilt 350, Rebuilt TH350, Reupholstered Bench Seat, sound proof/insulated, LED headlights/taillights/backup lights/interior courtesy lights.
Follow in the DITY