31/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number: BIT-DAM13X1/4

Part Number: BIT-DAM13X1/4

Part Number: Assortment Kit #299

Part Number: VibraTite146250ml

Part Number: DUR124-95-EXL-IND

Flute Length: 1-3/4"

31/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number: BIT-DAM13X1/4Product 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