9/16" X 1/8" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number DWC20MM-4FSE

Part Number DWC20MM-4FSE

Diameter/Pitch: 1/2"-20

Part Number D/ARSD1-5/16

The smaller flat end keys are made from 8660 nickel chromium molybdenum steel that's heat-treated to 54–58 HRC and the larger flat end keys are made from 6150 chromium vanadium steel that's heat-treated to 44–50 HRC

Pipe Range 3/4"–2"

9/16" X 1/8" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number DWC20MM-4FSEProduct Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and