Starrett 667S-1 Feeler Gage 0.001 in Parallel Leaf

Product Description

The STARRETT 667S-1 is a single replacement feeler gage leaf used for measuring precise clearances and gaps in mechanical assemblies. This parallel-style leaf measures 0.001 inches thick, 0.5 inches wide, and 12 inches long, providing consistent cross-section along its full length. Manufactured from stainless steel, it resists corrosion and holds calibration in oily or wet shop environments. HVAC technicians, machinists, and industrial mechanics use feeler gage leaves to check valve clearances, bearing fits, spark plug gaps, and component alignment where exact gap measurement is required.

This leaf is suited for residential and commercial service applications wherever controlled gap measurement is needed. Typical uses include checking blower wheel clearances, compressor valve tolerances, heat exchanger alignment, and general mechanical fit verification. The 12-inch length allows reach into recessed areas without secondary extension tools. Its 0.001-inch thickness makes it the standard starting leaf for building up measurements in combination with thicker leaves from the same set.

Key Features

• Parallel leaf profile maintains consistent 0.001-inch thickness along the full 12-inch length
• Stainless steel construction resists rust and corrosion in wet or oily service environments
• 0.5-inch width provides adequate contact surface for reliable gap readings
• 12-inch length reaches into deep or recessed assembly locations
• Single-leaf format serves as a direct replacement for worn or lost leaves in existing sets

Compatibility

Designed as an OEM-style replacement leaf compatible with standard feeler gage sets accepting 12-inch parallel leaves with 0.5-inch width.

Installation Notes

Feeler gage leaves require no installation tools but should be handled carefully to avoid bending, which permanently affects accuracy. Power down or shut off any equipment before inserting the gage leaf into rotating or pressurized assemblies. Clean the leaf and mating surfaces of oil buildup before use to ensure accurate readings. Replace any leaf that shows visible wear, pitting, or permanent deformation.