6 - Segment Information: Schedule of Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net Sales	$ 37,174,249	$ 35,764,714
Depreciation and Amortization	1,308,448	1,231,546
Accounts receivable, net	5,529,307	5,326,650
Inventories, net	6,100,391	4,528,100
Property, plant and equipment, net	13,258,146	12,556,953
Fastener
Net Sales	33,712,458	31,977,964
Depreciation and Amortization	1,161,082	1,093,476
Segment operating profit	3,731,998	3,574,783
Selling and administrative expenses	0	0
Other Income	0	0
Capital expenditures	1,635,115	1,093,539
Accounts receivable, net	5,196,437	5,080,191
Inventories, net	5,075,290	3,565,361
Property, plant and equipment, net	10,726,191	10,282,910
Other assets	0	0
Assembly Equipment
Net Sales	3,461,791	3,786,750
Depreciation and Amortization	112,942	100,908
Segment operating profit	1,108,248	1,350,111
Selling and administrative expenses	0	0
Other Income	0	0
Capital expenditures	49,884	178,761
Accounts receivable, net	332,870	246,459
Inventories, net	1,025,101	962,739
Property, plant and equipment, net	1,579,497	1,642,555
Other assets	0	0
Unallocated Corporate
Net Sales	0	0
Depreciation and Amortization	34,424	37,162
Segment operating profit	0	0
Selling and administrative expenses	(2,437,598)	(2,559,713)
Other Income	153,537	100,901
Capital expenditures	338,191	65,641
Accounts receivable, net	0	0
Inventories, net	0	0
Property, plant and equipment, net	952,458	631,488
Other assets	$ 8,358,781	$ 9,404,599