1/4" X 3/32" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Depth:19" Deep

Depth:19" Deep

STI Tap: M16-2

Size 5/8"-11

0x16 Round Button Head Socket Screw Off Road Moto Hardware Zinc - 2PCS

1/4" X 3/32" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Depth:19" DeepProduct 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