25/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Part Number: 75X300DPAPL

Part Number: 75X300DPAPL

Part Number DWTSMR1-5

Part Number: BIT-DMS71-1611

Flute Length 95

Length 10"

25/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Part Number: 75X300DPAPLProduct 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