Starrett 50641 Radius Gage 3/8 Inch Stainless Steel

Product Description

The STARRETT 50641 is a single-leaf radius gage designed to check and verify 3/8-inch convex and concave radii on machined parts, fabricated components, and finished surfaces. Built from stainless steel with a satin chrome finish, it delivers consistent, corrosion-resistant service in shop environments. Each leaf measures both a convex and a concave radius, giving the technician two reference profiles in one tool. At 0.05 pounds, it is light enough to carry in a tool pouch without adding bulk. Machinists, tool-and-die makers, fabricators, and maintenance technicians use this gage for quick go/no-go radius verification without requiring additional instruments or fixtures.

This gage is suited for use in machine shops, fabrication facilities, and maintenance environments where radius conformance must be confirmed on fillets, shoulders, and rounded edges. It is appropriate for both production inspection and field service work. The 0.38-inch maximum radius specification makes it a direct reference standard for parts calling out a 3/8-inch radius in their engineering documentation. It fits naturally alongside other leaf-style radius gages in a set when a range of radii must be checked across a single job.

Key Features

• Checks both convex and concave 3/8-inch radii from a single leaf
• Stainless steel construction resists corrosion in shop and field environments
• Satin chrome finish reduces glare during close visual inspection
• Lightweight at 0.05 pounds for easy portability
• Maximum radius of 0.38 inches matches standard 3/8-inch radius callouts

Compatibility

Designed as a standard single-leaf radius gage for use in general machining, fabrication, and inspection applications where 3/8-inch convex and concave radius verification is required.

Installation Notes

No installation is required for this hand-held inspection tool. Clean the part surface and the gage leaf before use to ensure accurate contact and a clear fit check. Handle the leaf by its edges to avoid introducing oils or debris that could affect the radius profile reading. Store the gage in a dry location away from abrasive materials to preserve the finish and edge geometry.