Starrett 50731 Screw Thread Micrometer 0-0.875 in

Product Description

The STARRETT 50731 is a mechanical screw thread micrometer designed for direct measurement of screw thread pitch diameters. It features a point-style anvil and a plain thimble, allowing contact at the thread flanks for accurate thread form measurement. The micrometer reads from 0 to 0.875 inches with a graduation of 0.001 inches and an accuracy of 0.0002 inches (0.004 mm). The spindle and anvil are steel construction with a satin chrome finish that resists corrosion and reduces glare during use. A case and wrench are included. This tool is used by machinists, toolroom technicians, and quality control professionals who require precise thread measurement at the bench or on the shop floor.

The 50731 is suited for measuring external screw thread pitch diameters in manufacturing, inspection, and toolroom environments. Its 0 to 0.875 inch range covers a wide variety of common fastener and threaded component sizes. The mechanical operation requires no batteries and provides reliable readings in shop conditions where electronic instruments may be less practical. This micrometer is appropriate for both production inspection and one-off verification tasks.

Key Features

• 0 to 0.875 inch measurement range for external thread pitch diameter
• Point-style anvil contacts thread flanks directly for accurate pitch diameter readings
• 0.001 inch graduation with 0.0002 inch accuracy (0.004 mm)
• Plain thimble with satin chrome finish for durability and low glare
• Steel spindle and anvil construction for long service life
• Includes protective case and wrench for field and bench use

Compatibility

Designed as an OEM-style precision measurement tool for external screw thread inspection across standard threaded fasteners and components within the 0 to 0.875 inch pitch diameter range.

Installation Notes

This instrument is used by machinists and quality technicians and does not require installation in a system. Before use, verify the micrometer is zeroed properly using the included wrench and reference standards appropriate to the thread form being measured. Store in the included case when not in use to protect the anvil points and spindle from damage.