3/8" X 3/32" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com 8 - 27 mm (WCF90321)

8 - 27 mm (WCF90321)

Tap Drill Size #44

Rivet Information:

Featuring the three essential types of cutting pliers

Vibra-Tite #: 122

3/8" X 3/32" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com 8 - 27 mm (WCF90321)Product 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