6 - Segment Information: Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue	$ 37,174,249	$ 35,764,714
United States
Revenue	32,730,823	31,365,190
Foreign
Revenue	4,443,426	4,399,524
Automotive
Revenue	22,453,284	22,719,904
Nonautomotive
Revenue	14,720,965	13,044,810
Fastener
Revenue	33,712,458	31,977,964
Fastener | United States
Revenue	29,470,140	27,681,055
Fastener | Foreign
Revenue	4,242,318	4,296,909
Fastener | Automotive
Revenue	22,215,719	22,527,813
Fastener | Nonautomotive
Revenue	11,496,739	9,450,151
Assembly Equipment
Revenue	3,461,791	3,786,750
Assembly Equipment | United States
Revenue	3,260,683	3,684,135
Assembly Equipment | Foreign
Revenue	201,108	102,615
Assembly Equipment | Automotive
Revenue	237,565	192,091
Assembly Equipment | Nonautomotive
Revenue	$ 3,224,226	$ 3,594,659