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The WILLIAMS COMFORT PRODUCTS O-472A is an adjustable pin spanner wrench designed for tightening and loosening threaded collars, retaining rings, and spanner nuts found in HVAC, plumbing, and mechanical service applications. The O-472A covers a working range of 1.25 inches to 3 inches, making it suitable for a wide variety of fastener diameters encountered in trade service work. Weighing just 0.483 pounds, it is a lightweight hand tool intended for professional technicians who need precise torque control on components that require pin-style engagement rather than standard hex or socket drive.
The O-472A is well suited for residential and light commercial service work where spanner-style fasteners are common, including pump assemblies, motor mounts, bearing retainers, and valve packing nuts. Its adjustable design reduces the need to carry multiple fixed-size spanners, making it a practical addition to a field technician's toolkit across HVAC, plumbing, and mechanical trades.
Designed as a general-purpose adjustable pin spanner wrench suitable for spanner nuts and threaded retaining collars within the 1.25-inch to 3-inch diameter range.
This tool is used by licensed HVAC technicians, plumbers, and mechanical service professionals during equipment maintenance or component replacement. Always de-energize and lock out electrical equipment and shut off fluid supply lines before disassembling any assembly requiring a spanner wrench. Use only the appropriate pin size and engagement depth to avoid slipping and damaging the fastener face.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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