!template
author: 'ben lipkowitz'
license: 'GPL2+'
urls: 

screw: !screw
 thread: !thread 
    interfaces:
        - !interface &thread_tighten
        name: thread-tighten
        units: N
        - !interface &thread_loosen
        name: thread-loosen
        units: N
    diameter: in
    form: string 
    pitch: rev/in

 interfaces: #or should this go in screw.py?
    - *thread_tighten
    - *thread_loosen
    - !interface
        name: compression-face
        units: N
    - !interface
        name: torque-spline
        units: N*m/rev
 grade: string
 length: in