Starrett 66B English Thickness Gage 31 Straight Leaves .0015-.035" SAE Feeler Gauge Set

The Starrett 66B English Thickness Gage is a professional-grade feeler gauge set featuring 31 straight leaves with a measurement range of .0015" to .035". Trusted by machinists, mechanics, and engineers, this precision instrument is an essential tool for any automotive, aviation, diesel, or farm equipment application — as well as jig, fixture, and experimental work.

Each leaf measures 1/2" x 3-1/32" and is individually tested and permanently marked with its thickness value for quick, confident identification in the field or shop.

Key Features:

• 31 straight tempered-steel leaves ranging from .0015" to .035"
• Leaf increments: .0015, .002, .0025, .003 through .026 (in .001 steps), .028, .030, .032, .035"
• Each leaf individually tested and stamped with its thickness
• Locking device allows one or more leaves to be securely fixed in position
• Leaves are easily removed and replaced as needed
• Rugged, substantial steel case protects leaves during storage and transport
• Leaf size: 1/2" x 3-1/32"
• SAE (Imperial) measurement system

Common Applications:

• Adjusting tappets, spark plugs, and distributor points
• Checking bearing clearances and gear play
• Fitting pistons, rings, and pins
• Gaging narrow slots and precision gaps

The Starrett 66B is part of L.S. Starrett's renowned line of precision thickness gages — manufactured to exacting standards since 1880 and trusted across industrial, professional, and automotive markets worldwide. Also known as a feeler gauge set or thickness gauge set, this tool is a must-have for precise clearance measurement.