Starrett 52847 Feeler Gage 0.009 in Parallel Leaf Tempered Steel

Product Description

The STARRETT 52847 is a single-blade parallel-leaf feeler gage used to measure and verify precise clearances and gaps in mechanical assemblies. The leaf measures 0.009 inches thick, 0.5 inches wide, and 12 inches long, ground from tempered steel for consistent accuracy across the full length. Technicians use feeler gages like this one when setting valve lash, checking bearing clearances, verifying spark plug gaps, or fitting mating surfaces during equipment assembly and maintenance. The tempered steel construction resists deflection and maintains calibrated thickness under repeated use.

This feeler gage leaf is suited for trade professionals working on HVAC equipment, refrigeration compressors, gas-fired appliances, pumps, and general mechanical systems where precise gap measurement is required. The 12-inch length allows reach into tight assemblies without the leaf flexing off-axis. The parallel leaf style provides a uniform cross-section from tip to blade root, making it appropriate for any application requiring a consistent thickness reading along the full insertion depth.

Key Features

• 0.009-inch nominal thickness for close-tolerance gap measurement
• Parallel leaf style delivers uniform thickness along the full 12-inch length
• Tempered steel construction resists wear and maintains calibrated dimensions
• 0.5-inch width provides adequate blade surface for stable contact
• 12-inch length extends reach into deep or obstructed assemblies

Compatibility

Designed as a standard parallel-leaf feeler gage for use in any mechanical, HVAC, or plumbing application requiring a 0.009-inch gap measurement blade.

Installation Notes

Feeler gages are a hand-measurement tool and do not require installation. Before use, ensure mating surfaces are clean and free of debris that would affect the reading. Insert the blade with light, consistent pressure — the leaf should slide with slight drag, not force. Do not bend or crimp the leaf, as permanent deformation will compromise measurement accuracy.