Description

The CENTURY DRILL TOOL CO INC 98401 is a fractional pitch gauge used to identify and verify thread pitch on fractional inch-threaded fasteners and fittings. The gauge covers a range of 12 to 40 threads per inch (TPI), making it suitable for a wide range of standard fractional thread forms encountered in mechanical, plumbing, and HVAC work. Sold as a package of 2 gauges, it gives technicians a reliable reference tool for confirming thread counts before selecting taps, dies, or threaded fittings. At 0.1 pounds, it is compact and easy to carry in a tool bag or service kit.

This pitch gauge is used in trade and maintenance applications where technicians need to quickly identify unknown thread pitches on pipe fittings, fasteners, and mechanical components. It is appropriate for residential and light commercial service work involving fractional inch threads, which are common in domestic plumbing, HVAC equipment fasteners, and general mechanical assemblies. Licensed tradespeople and experienced service technicians use pitch gauges during diagnosis, repair, and parts sourcing to avoid thread mismatch errors.

Key Features

Covers 12 to 40 TPI range for fractional inch threads
Packaged as a set of 2 gauges per unit
Lightweight at 0.1 pounds for easy portability in a tool bag
Provides a direct physical reference for confirming thread pitch before parts selection
Useful across plumbing, HVAC, and mechanical service applications

Compatibility

Designed for use with standard fractional inch threaded fasteners and fittings in the 12 to 40 TPI range, consistent with common thread forms found in residential and light commercial mechanical systems.

Installation Notes

No installation is required for this tool. To use, select a blade from the gauge set and align its teeth against the thread profile of the fastener or fitting being measured. Work with the system depressurized and de-energized when measuring threads on components that are part of an active system. Store the gauge in a dry location to prevent corrosion of the measuring blades.