Spi 23-124-1 Thread Plug Gage 3-48 Go No Go Class 2A

Product Description

The SPI 23-124-1 is a truncated taperlock thread plug gage used to inspect No. 3-48 unified national coarse and fine threaded features to Class 2A tolerances. It includes both Go and No Go members, allowing technicians to verify that internal threads fall within the acceptable dimensional range in a single tool set. Constructed from tool steel for durability and dimensional stability, this gage is appropriate for quality control work in precision machining, manufacturing, and assembly environments. At 5 inches in length and 0.212 pounds, it is compact and easy to handle at the bench or on the floor.

The 23-124-1 is suited for incoming inspection, in-process thread verification, and final inspection of small-diameter threaded holes. The No. 3-48 designation covers fine-pitch thread applications common in instrumentation, electronics assembly, and light mechanical components. Class 2A classification aligns with standard commercial and industrial thread tolerances, making this gage appropriate for general-purpose thread inspection where a moderate fit is specified.

Key Features

• Go and No Go members included for complete Class 2A thread verification
• Truncated taperlock design for secure handle mounting and easy member replacement
• Tool steel construction for wear resistance and long service life
• Covers No. 3-48 thread size for small-diameter precision fastener inspection
• Compact and lightweight at 0.212 pounds for bench or production floor use

Compatibility

Designed for use with standard taperlock gage handles. The Go and No Go members are sized for No. 3-48 internal threads inspected to Class 2A tolerance specifications.

Installation Notes

Thread plug gages are installed by a quality technician or machinist into a compatible taperlock handle before use. Ensure the handle taper and gage member taper are clean and free of chips or debris before seating the member. Do not force the Go member through a thread that shows resistance, as this can damage the gage or the workpiece. Calibrate and store gages per your facility quality management procedures to maintain traceability and measurement accuracy.