QJOM21A - Wrench Head 21 mm - Wrench It features a 3/8" inner

It features a 3/8" inner diameter (ID) and a 3/4" right/left (R/L) nut

fail-proof engagement with the fastener head

Operation: Can be frontseated or backseated

The Henry 937307 Ball Valve is designed for efficient isolation and control of fluid flow in refrigeration and air conditioning systems

Flow Rate: 57 GPH at 1 ft

QJOM21A - Wrench Head 21 mm - Wrench It features a 3/8" innerWilliams QJOM21A 21 mm Wrench Head (WR Head) The Williams QJOM21A 21 mm Wrench Head is a precision machined, industrial grade open end head designed for technicians who require fast engagement, high accessibility, and reliable durability. Ideal for reaching metric fasteners in tight or obstructed areas, this WR style head is perfect for machinery maintenance, assembly operations, heavy equipment service, utilities, and plant floor mechanical work.