Special Features:

Second shoulder 1 degree angle, rate of reduction in dia. Per inch of length equals 0.0208 min. And 0.2094 max., under cut on underside of head, diameter 0.890 min in. And 0.910 max in. And 0.135 min in. 0.165 max in. Length

Properties:

An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is not designed to be held or driven with an inserted drivers. A locking feature may be incorporated in the design of the head or threads. For items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. For items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. Excludes thumbscrew.