Segment Reporting: Schedule of Segment Reporting by Segment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Net sales	$ 8,364,390	$ 4,103,520	$ 17,669,339	$ 11,679,975
Depreciation			660,489	676,137
Accounts receivable - Less allowances of $170,000	5,909,978		5,909,978		$ 5,163,450
Inventories, net	7,056,669		7,056,669		5,153,294
Net property, plant and equipment	12,819,527		12,819,527		$ 13,150,884
Fastener
Net sales	7,142,044	3,513,742	15,290,722	10,251,139
Depreciation	291,342	297,534	582,525	593,644
Segment operating profit	574,638	(653,510)	1,501,796	(249,492)
Selling and Administrative Expenses	0	0	0	0
Interest income	0	0	0	0
Capital expenditures	228,750	29,545	333,274	197,542
Accounts receivable - Less allowances of $170,000	5,443,167	3,327,037	5,443,167	3,327,037
Inventories, net	5,861,971	3,782,622	5,861,971	3,782,622
Net property, plant and equipment	10,214,388	10,651,338	10,214,388	10,651,338
Other Assets	0	0	0	0
Assembly Equipment
Net sales	1,222,346	589,778	2,378,617	1,428,836
Depreciation	33,533	32,869	67,066	65,738
Segment operating profit	340,002	31,010	636,702	215,581
Selling and Administrative Expenses	0	0	0	0
Interest income	0	0	0	0
Capital expenditures	0	0	0	0
Accounts receivable - Less allowances of $170,000	466,811	230,600	466,811	230,600
Inventories, net	1,194,698	963,164	1,194,698	963,164
Net property, plant and equipment	1,501,796	1,621,026	1,501,796	1,621,026
Other Assets	0	0	0	0
Unallocated Corporate
Net sales	0	0	0	0
Depreciation	5,449	8,378	10,898	16,755
Segment operating profit	0	0	0	0
Selling and Administrative Expenses	(512,526)	(503,340)	(1,056,298)	(1,054,236)
Interest income	4,393	25,324	14,435	59,199
Capital expenditures	0	57,810	11,939	57,810
Accounts receivable - Less allowances of $170,000	0	0	0	0
Inventories, net	0	0	0	0
Net property, plant and equipment	1,103,343	980,904	1,103,343	980,904
Other Assets	$ 6,635,401	$ 8,859,829	$ 6,635,401	$ 8,859,829