Starrett 52865 Feeler Gage 0.027 in Parallel Leaf Steel

Product Description

The STARRETT 52865 is a single-leaf feeler gage designed for precise gap measurement in mechanical and industrial service work. The parallel leaf is 0.027 inches thick, 0.5 inches wide, and 12 inches long, providing consistent cross-section measurements from end to end. Constructed from tempered steel, the leaf resists bending and wear under repeated use. This gage is a standard tool for HVAC technicians, machinists, and service professionals who need reliable, repeatable thickness checks on components such as valve clearances, burner assemblies, compressor tolerances, and similar close-tolerance applications.

The 52865 feeler gage leaf is suited for both bench and field use. Its 12-inch length gives technicians enough reach for deep or recessed clearance checks without requiring disassembly. The 0.5-inch width makes it easy to handle and position precisely. The parallel profile ensures the same 0.027-inch thickness across the full length of the leaf, which is critical when consistency matters across a measurement span. This type of gage is commonly used in residential and light commercial HVAC maintenance, refrigeration equipment service, and general mechanical trades.

Key Features

• Parallel leaf design delivers uniform 0.027-inch thickness along the full 12-inch length
• Tempered steel construction resists deformation and corrosion during regular service use
• 0.5-inch leaf width provides stable grip and easy positioning in tight spaces
• 12-inch leaf length suits deep-reach gap checks without component removal
• Single-leaf format allows use as a standalone gage or as part of a custom set

Compatibility

Designed as a standard feeler gage leaf for use in any application requiring a 0.027-inch gap check, including valve clearance measurement, burner orifice inspection, and mechanical assembly verification in HVAC, refrigeration, and general mechanical service.

Installation Notes

Feeler gages require no installation but should be used by qualified technicians familiar with the clearance specifications of the equipment being serviced. Always power down or de-energize equipment and relieve system pressure before inserting a feeler gage into a live mechanical assembly. Keep the leaf clean and free of debris before measurement to ensure accurate readings. Store the leaf flat to prevent warping that could compromise measurement accuracy.