Cleveland C54768 Straight Flute Hand Tap 9/16"-18 UNF HSS 4-Flute

Cleveland C54768 Tap Application

The Cleveland C54768 is a straight flute hand tap designed for creating internal UNF threads in a 9/16"-18 size. It suits machinists and maintenance technicians who need to cut precise right-hand threads by hand or with a tapping head. The high speed steel construction provides the hardness required for general-purpose threading in steel and non-ferrous metals. This tool is not for buyers who need to tap larger diameters or different thread standards.

UNF Thread Standard Limits

The tap follows the UNF fine-pitch standard with an 18 threads-per-inch count and a Class 3B fit. A 75 percent thread engagement requires a 12.90 mm drill size before tapping. The H3 thread limit defines the tolerance zone for the finished thread. Users cannot apply this tap for coarse-thread UNC series or for left-hand thread requirements without a different tool.

High Speed Steel Build Quality

The bright, uncoated high speed steel body resists wear during manual threading operations. Four flutes provide chip clearance and cutting stability across the 1 21/32 inch thread length. The overall length of 3 19/32 inches offers sufficient reach for through-holes and deep blind holes. The straight flute geometry demands regular reversal to break chips and prevent binding in deep cuts.