Square Keystock, 3/8"

Square Keystock, 3/8"

The Square Keystock (3/8") is a precision-machined steel bar designed to lock gears, pulleys, sprockets, and couplings to rotating shafts in mechanical power transmission systems. Installed in matching keyways on both the shaft and the hub, the keystock prevents rotational slippage and ensures torque is transferred efficiently between components. With a 3/8" square profile, it fits standard keyway dimensions used in many industrial, agricultural, and mechanical assemblies. It’s a simple piece of steel doing a very important job—because when shafts start spinning, everything attached to them needs to spin right along with them.

Country of Origin
Varies by production batch

Key Features / Specifications

• Product Type: Square keystock / machine key
• Size: 3/8 in × 3/8 in square profile
• Material: Carbon steel
• Shape: Square key bar for standard keyway slots
• Function: Locks rotating components to shafts to transmit torque
• Design: Straight key stock suitable for cutting to required lengths
• Application: Used with shafts, gears, pulleys, sprockets, and couplings
• Fabrication: Can be cut to custom lengths for specific assemblies

Ideal For

• Power transmission systems and rotating equipment
• Securing gears, pulleys, and sprockets to shafts
• Agricultural machinery and industrial equipment
• Machinery repair, fabrication, and mechanical assembly work
• Anyone who knows that without the right key in place, even the best shaft and pulley combination won’t stay synchronized for long.