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The WILLIAMS COMFORT PRODUCTS O-472 is an adjustable pin spanner wrench designed to engage slotted or pin-style fasteners and retaining rings across a range of sizes from 1.25 inches to 3 inches. This type of tool is used by HVAC technicians, plumbers, and general trade professionals to safely grip and turn components that cannot be reached by conventional open-end or socket wrenches. The adjustable design allows a single tool to cover multiple fastener sizes, reducing the need to carry multiple fixed spanners on a service call. The O-472 is sold individually.
Pin spanner wrenches are commonly used in HVAC, plumbing, and mechanical service applications where shaft collars, packing nuts, bearing retainers, and similar round fasteners require controlled torque without marring the component surface. The 1.25-inch to 3-inch adjustment range makes the O-472 suitable for a broad range of residential and light commercial service scenarios. It is an appropriate addition to any trade technician's general service toolkit.
Designed as a general-purpose adjustable pin spanner wrench suitable for slotted retaining rings, shaft collars, bearing retainers, and similar round fasteners with pin or slot engagement points in the 1.25-inch to 3-inch diameter range.
Pin spanner wrenches are a hand-tool item and do not require power disconnection for use on their own, but always de-energize and isolate any system or assembly before beginning mechanical disassembly. Ensure the pins are fully seated in the fastener slots before applying torque to avoid slippage and component damage. This tool is intended for use by qualified trade professionals familiar with the fastener type and the assembly being serviced.
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