Klein Tools 1-1/16-Inch Standard Bull Pin

Two lengths: a 12-inch pin, part number 3257, and a 15-inch pin, part number 3251. Both are the same 1-1/16 inch standard bull pin, so the choice is purely about how much reach you want when lining up bolt holes in deeper steel assemblies.

No. OSHA 1926.301(c) requires that impact tools such as drift pins, wedges and chisels be kept free of mushroomed heads, so a pin with a spread head has to be dressed back or taken out of service. Because this is the standard pattern with no mushroom resistance built in, inspect the struck end regularly and always wear approved eye protection when driving it.

This is the standard design. Klein states plainly that the standard pattern costs less up front but gives no added protection against mushrooming at the struck end. If you drive pins daily on ironwork or lineman crews, the mushroom-resistant pattern lasts longer in service. If the pin is an occasional alignment tool in the truck, the standard version is the economical pick.

A bull pin is a drift tool. You drive it into misaligned bolt holes to pull the plates or flanges into register so the bolts can start. It does not cut, so if the holes themselves are undersized or burred you need a reamer instead. With a 0.375 inch point and 1-1/16 inch body, this pin handles the pull-into-line job on bolted steel and strut assemblies.

Machined from alloy steel and heat treated for strength, with a black finish for rust resistance. The finish helps in a damp gang box or truck bed, but it is a surface treatment, not plating, so wipe the pin down after wet work. Made in the USA.