用於連接螺絲或者螺栓。適配器包含Ø 4 mm插座，可與帶硬質絕缘外殼的Ø 4 mm彈簧式插頭配合使用。

For connection of screw heads with rigid Ø 4 mm socket in insulator, suitable for mating with spring-loaded Ø 4 mm plugs with rigid insulating sleeve.

用於連接螺絲或者螺栓。適配器包含Ø 4 mm插座，可與帶硬質絕缘外殼的Ø 4 mm彈簧式插頭配合使用。

For connection of screw heads with rigid Ø 4 mm socket in insulator, suitable for mating with spring-loaded Ø 4 mm plugs with rigid insulating sleeve.

用於連接螺絲或者螺栓。適配器包含Ø 4 mm插座，可與帶硬質絕缘外殼的Ø 4 mm彈簧式插頭配合使用。

For connection of screw heads with rigid Ø 4 mm socket in insulator, suitable for mating with spring-loaded Ø 4 mm plugs with rigid insulating sleeve.

"用於自组裝測試導線，Ø 4 mm，採用MULTILAM技術。插頭帶有伸缩套管可防止意外觸摸。由於插頭莊有防護頸圈，電器間隙和爬電距離增加，因此，裝配此款插頭后，即使一些老式測試儀器没有安裝安全插座，不符合600 V CAT II的安全標準，測試導線也可以與之安全連接。
螺纹连接"
"In-line, Ø 4 mm, with spring-loaded MULTILAM,
for self-assembly of test leads. With retractable sleeve to prevent accidental touching. As a result of the protective collar,the clearances and creepage distances
allow test leads equipped with this plug also to be safely connected to older test instruments not yet fitted with safety sockets up to 600 V, CAT II in accordance with the standards.
Screw connection."