The QA1 steel jam nut has a 1/2-20 left hand thread with a 3/4in hex and a 5/16in width. It is made from high carbon steel with a protective coating and references ANSI B18.2.2-1972.
Specifications:
- Thread: 1/2-20
- Thread direction: left hand
- Hex size: 3/4in
- Width: 5/16in
- Material: high carbon steel with protective coating
- Part number: JNL8S
FAQ
What thread does the QA1 JNL8S jam nut use?
It uses a 1/2-20 left hand thread.
What are the hex and width dimensions?
The nut has a 3/4in hex and is 5/16in wide.
What is this jam nut made from?
It is made from high carbon steel with a protective coating and references ANSI B18.2.2-1972.

