Value Collection -31950-3 Woodruff Key Steel 50 Pack

Product Description

The VALUE COLLECTION -31950-3 is a USA Standard No. 303 Woodruff key designed for use in shaft-and-hub assemblies where a crescent-shaped key is required to transmit torque and prevent relative rotation between mating components. Measuring 3/8 inches long by 3/32 inches wide, this key is machined from steel to provide the strength and dimensional accuracy needed for reliable interference fits. Each pack contains 50 keys, making it a practical choice for shop stock, maintenance kits, or production runs where replacements are frequently needed. Installation is performed by machinists, millwrights, and mechanical service technicians working on rotating equipment across a wide range of industrial and trade applications.

This Woodruff key suits applications where a semi-circular key seated in a milled shaft slot is required to align and drive pulleys, gears, sprockets, or impellers. The No. 303 designation follows USA Standard sizing, making it a direct fit wherever that specification is called out on a drawing or parts list. Typical use cases include pump shafts, small motor shafts, and light-duty power transmission assemblies encountered in HVAC equipment, plumbing pumps, and general mechanical service work. The 50-piece pack quantity supports bench stock and reduces downtime on repeat service calls.

Key Features

• USA Standard No. 303 Woodruff key geometry for consistent fitment in milled shaft slots
• Steel construction provides the shear strength and hardness required for torque transmission
• 3/8 inches long by 3/32 inches wide dimensions match standard No. 303 callouts
• 50-piece pack quantity supports shop stock and reduces repeated small-quantity ordering
• UNSPSC Code 31163207 for procurement and catalog classification

Compatibility

Designed as an OEM-style replacement Woodruff key for shaft-and-hub assemblies specifying a USA Standard No. 303 key, 3/8 inches long by 3/32 inches wide.

Installation Notes

Installation is typically performed by a machinist, millwright, or qualified mechanical technician. Always de-energize and lock out the equipment per OSHA lockout/tagout procedures before servicing shaft assemblies. Inspect the shaft slot and hub keyway for wear, burrs, or damage before seating the new key. Do not force an oversized key into an undersized slot, as distortion of the key or slot will compromise the assembly.