[INCH-POUND]

a) Method 1A: A tapered, hardened, tool-steel pin, steel dowel, drill bit or bearing, or a carbide-center mild steel pin, shall be driven into the hole. There shall remain at each end of the pin a shallow recess not less than 1/8" nor more than 3/16" deep to permit the acceptance of substantial welds (recommend MIG or TIG). ................
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