Stephen A, 2020 Nov 19
Ordered and received PO 75-S492380 including threaded rod and nut with 2"-12 thread. These items are under consideration for A+ FC Tube Support Stand, particularly for use in weldment D2000445. Some observations:
- Thread area seems very small, nuts seem very large - wonder how strong the interface is.
- Pitch seems cumbersome - minutes may be necessary to install a nut in the middle of the thread.
- External thread appears to have some small damaged areas. Thread of nut can run over these areas, but with increase in friction.
- No apparent wobble or loosness of nut due to fit.
- Nut appears to have a oily coating applied to the outer surfaces, but not to internal threads.
Also ordered were two McMaster offerings which could be used for rust inhibiting conversion coatings (formulations appear to be based on phosphoric acid - more could be learned by investigating specific products). Potential workflow for experimenting:
- Learn about the operating instructions for the specific product
- Apply the coatings to 1 nut each (preclean needed for outer surfaces?)
- Apply the coatings to different regions of the threaded rod
This experiment would allow us to learn about how the conversion coatings may work and behave.
See attached photos and video for more insights. |