Starrett 66BS Feeler Gage Set 31 Leaves Stainless Steel

Product Description

The STARRETT 66BS is a 31-leaf parallel feeler gage set made from stainless steel, designed for precise gap and clearance measurement in mechanical and trade applications. Leaf thicknesses range from 0.0010 to 0.0350 decimal inch, giving technicians a wide measurement spread in a single compact set. Each leaf is 3-1/32 inches long and 1/2 inch wide, with a parallel profile that keeps contact surfaces consistent across the full leaf length. HVAC technicians, machinists, plumbers, and industrial maintenance professionals use feeler gages to check valve clearances, bearing fits, spark plug gaps, and flange alignment tolerances.

This set suits residential and light commercial maintenance tasks where precise clearance verification is required. The stainless steel construction resists corrosion and wear, making it appropriate for use in humid mechanical rooms, boiler rooms, and field service environments. The 31-leaf configuration covers the most commonly needed decimal-inch thicknesses, reducing the need to carry multiple sets on a service call.

Key Features

• 31 stainless steel leaves covering 0.0010 to 0.0350 decimal inch
• Parallel leaf style for consistent contact across the full leaf surface
• Leaf length of 3-1/32 inches with 1/2 inch width for access in tight clearances
• Stainless steel material resists rust and corrosion in wet or humid environments
• Compact set weight of 0.3 pounds for easy carry in a tool bag or pouch

Compatibility

Designed as a general-purpose decimal-inch feeler gage set suitable for mechanical clearance measurement tasks across HVAC, plumbing, and industrial maintenance applications.

Installation Notes

Feeler gages are a measurement tool, not an installed component. Select the appropriate leaf thickness for the gap being measured and insert it with light, consistent hand pressure. Do not force leaves into tight clearances, as this can deform the leaf and compromise accuracy. Keep leaves clean and lightly oiled when stored to prevent corrosion and maintain calibration integrity.