Employing six people, the company has shifted its focus from eyeglasses to miniature
screw threads for precision instruments.
* Hanger bolts feature large
screw threads on one end and bolt threads on the other.
As a control to evaluate the effect of
screw threads on the polyurethane foam, a smooth pin of the same root diameter as the 6.5 mm screw was evaluated for its resistance to displacement, and the results compared to those of the 6.5 mm cancellous screw.
Today, you can buy a bolt in Los Angeles and a nut in Boston and they will fit together perfectly because of
screw thread standards.
The continuous thread finishes 33-400, 38-400 and 45-400 will accept either a standard
screw thread or a child-resistant closure, while the 33 mm, 38 mm and 45 mm tamper-evident finishes will accommodate a snap-on style closure.
There is ample
screw thread depth into the receiver just above the top extractor groove of the receiver.
The typical thread form tool is built to fit a range of
screw thread sizes.
When defining a
screw thread, one must consider separate definitions for an external thread (screw or bolt) and an internal thread (nut).