Starrett 50342 Inside Spring Joint Caliper 12 in

Product Description

The STARRETT 50342 is a 12-inch leg, spring joint inside caliper built for precise inside measurement in metal fabrication, machining, and maintenance trades. The caliper features a flat leg profile and a solid nut with screw adjustment, allowing the technician to lock in a measurement and transfer it to a rule or micrometer with confidence. The body is steel with a polished finish, giving it durability and resistance to shop wear. Maximum measurement capacity reaches 12 inches (300mm). This tool is a standard in the toolkit of machinists, pipefitters, and millwrights who need repeatable inside dimension readings without the bulk of a digital instrument.

The STARRETT 50342 is suited for inside measurement tasks in job shops, maintenance facilities, and production environments. It is compatible with the Starrett 73 accessory line. Typical applications include measuring bore diameters, pipe inside diameters, and slot widths where a direct-reading instrument is either unavailable or impractical. The screw adjustment method provides fine control when setting the caliper to a target dimension before transferring the reading.

Key Features

• 12-inch (300mm) maximum inside measurement capacity
• Spring joint design maintains consistent tension during use
• Flat leg profile for accurate contact inside bores and slots
• Solid nut with screw adjustment for precise, repeatable settings
• Steel construction with polished finish for shop durability
• Compatible with Starrett 73 accessories

Compatibility

Designed for use with the Starrett 73 accessory line. This inside caliper is a standard OEM-style measuring tool suited for general inside measurement applications in machining and maintenance trades.

Installation Notes

This caliper is a hand measurement tool and does not require installation in the traditional sense. Before use, ensure the caliper legs are clean and free of burrs that could affect contact accuracy. Set the desired dimension using the screw adjustment and lock the solid nut before transferring the reading to a rule or micrometer. Store in a dry location away from corrosive materials to preserve the polished steel finish.