7/16"-14 UNC Tin-Coated Plug Tap, Tap America Live and the ball/socket piece is

and the ball/socket piece is made from 8660 nickel-chromium-molybdenum steel

Part Number DMOD28

Part Number: assortment-kit-4661510 Pieces - Coarse Thread

the maximum torque of the L-keys consistently exceeds the ASME standards for minimum torsion load and the ISO standards for minimum proof torque

They're designed for use with both friction ring anvils and detent pin anvils

7/16"-14 UNC Tin-Coated Plug Tap, Tap America Live and the ball/socket piece isProduct Description Tin Coated High Speed Steel Hand Taps are used to make new threads or re thread damaged and or jammed threads. Hand Taps are the most versatile taps for hand use and they are popular for use in general machine tapping. Appropriate for tapping the vast majority of materials in through or blind holed conditions. Hand Taps come in three styles Taper, Plug or Bottoming Taper Style: Starts the thread square with the workpiece. Plug