Mitutoyo 184-301S Feeler Gage Parallel Leaves

Product Description

The MITUTOYO 184-301S is a parallel-leaf feeler gage used to measure small gaps, clearances, and tolerances in mechanical assemblies. Constructed from stainless steel, it delivers consistent accuracy and resists corrosion in shop environments. The parallel leaf style provides uniform thickness across the full length of each blade, making it suitable for precise gap measurement where a tapered or stepped leaf would introduce error. Machinists, HVAC technicians, engine rebuilders, and maintenance mechanics use feeler gages during valve lash adjustment, bearing clearance checks, and equipment alignment tasks. Each leaf measures 150 millimeters in length.

This feeler gage is suited for both shop-floor maintenance and field service applications. The stainless steel construction holds up in environments where moisture, cutting fluids, or mild chemical exposure is common. Parallel leaves are the standard choice when measuring consistent gap widths across a flat or linear contact surface, such as checking spark plug gaps, shim clearances, piston ring end gaps, or machinery alignment tolerances. It is packaged as a single unit.

Key Features

• Parallel leaf style provides uniform thickness for consistent gap measurement
• Stainless steel construction resists corrosion and wear in shop and field environments
• 150 millimeter leaf length accommodates a wide range of clearance checking applications
• Compact and lightweight at 0.5 pounds for easy handling and portability

Compatibility

Designed as an OEM-style replacement feeler gage leaf suitable for general mechanical clearance and gap measurement applications across a variety of trade and industrial uses.

Installation Notes

Feeler gages require no installation tools and are used by hand to check clearances between mating surfaces. Select the appropriate leaf thickness and slide it into the gap being measured without forcing; a slight drag with no binding indicates the correct fit. Keep leaves clean and lightly oiled when storing to prevent surface corrosion that could affect measurement accuracy. This product is intended for use by qualified mechanics, machinists, or technicians familiar with clearance measurement procedures.