Parallel Thread (Black Nut) – Also known as a fixing thread,
this method relies on two parallel threads providing a strong
connection plus a washer to achieve the seal. This version was
originally designed to primarily fit metal threads. Because a seal is
used there is no requirement for thread tape which means a quick
and reliable connection.
this method relies on two parallel threads providing a strong
connection plus a washer to achieve the seal. This version was
originally designed to primarily fit metal threads. Because a seal is
used there is no requirement for thread tape which means a quick
and reliable connection.