Starrett 667S-30 Feeler Gage 0.03 in Parallel Leaf 12 in

Product Description

The STARRETT 667S-30 is a single parallel-leaf feeler gage used to measure precise gaps, clearances, and tolerances in mechanical assemblies. The leaf measures 0.03 inches thick, 0.5 inches wide, and 12 inches long, providing enough reach for deep clearance checks in tight spaces. Constructed from stainless steel, the leaf resists corrosion and holds its calibrated thickness under repeated use. Machinists, HVAC technicians, and diesel mechanics rely on feeler gages like this one when setting valve clearances, checking bearing end-play, verifying spark plug gaps, and confirming flange alignment. The parallel leaf profile ensures consistent contact across the full length of the blade.

This feeler gage leaf is suited for both shop and field use wherever a single known thickness is needed for a go/no-go clearance check. Common applications include setting furnace burner electrode gaps, checking compressor valve plate clearances, verifying motor bearing fits, and inspecting flange face separations. The 12-inch leaf length makes it practical for reaching into confined equipment housings without requiring disassembly of adjacent components.

Key Features

• Parallel leaf profile delivers consistent thickness measurement along the full 12-inch length
• Stainless steel construction resists corrosion and extends service life in wet or oily environments
• 0.03 inch calibrated thickness for precise gap and clearance verification
• 0.5 inch blade width provides stable contact surface against mating parts
• Single-leaf format allows targeted use without carrying a full gage set

Compatibility

Designed as a standard parallel-leaf feeler gage replacement suitable for general mechanical, HVAC, plumbing, and industrial maintenance applications requiring a 0.03 inch gap measurement.

Installation Notes

Power down or de-energize any equipment before inserting a feeler gage into rotating or energized assemblies. Insert the leaf with light drag-fit pressure; forcing the blade can spring it and alter calibration. Clean mating surfaces of oil and debris before gauging to ensure an accurate reading. Feeler gages should be inspected periodically for nicks, bends, or wear that may affect accuracy.