Test #1
In our initial test, we found the following:

Retention Knob Manufacturer Inspection Results
Lyndex *Heads are soft (possible shallow case)
*Experienced breakage
Retention Knob Supply *Undersized major diameter (65% thread)
*Undersized pitch diameter
*Un-even heat treat
*Soft surface hardness
US Shop Tools *Soft surface hardness
*Thread relief too wide resulting in thread length not being long enough to support maximum pull
Command *Undersized major diameter (60% thread)
*Double thread condition


Testing Results
The test results from J & M Machine can be viewed below in PDF format. (Click icon to download Adobe Reader Get Adobe Reader)

Third-Round Test Results

 Second-Round Test Results

%d bloggers like this: