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31/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Size 1/4"-28

SKU 35227940553
4.5
Description

Size 1/4"-28

Part Number: BIT-T/A54929

Diameters: #2-56

Flute Length: 1-3/4"

Part Number: Assortment Kit #299

31/32" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Size 1/4"-28Product 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

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