Schedule of Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016
Net Sales	$ 35,764,714		$ 37,022,378
Depreciation and amortization	1,231,546		1,242,357
Segment operating profit	4,924,894		6,040,026
Selling and administrative expenses	(2,559,713)		(2,557,301)
Other income	100,901		65,255
Capital expenditures	1,337,941		2,027,860
Accounts Receivable, net	5,326,650	[1]	5,323,519	[2]
Inventories, net	4,528,100		4,537,693
Property, Plant and Equipment, net	12,556,953		12,450,558
Other assets	9,404,599		8,892,539
Fastener
Net Sales	31,977,964		33,126,599
Depreciation and amortization	1,093,476		1,078,281
Segment operating profit	3,574,783		4,689,749
Selling and administrative expenses	0		0
Other income	0		0
Capital expenditures	1,093,539		1,683,953
Accounts Receivable, net	5,080,191		5,036,251
Inventories, net	3,565,361		3,639,940
Property, Plant and Equipment, net	10,282,910		10,282,847
Other assets	0		0
Assembly Equipment
Net Sales	3,786,750		3,895,779
Depreciation and amortization	100,908		93,876
Segment operating profit	1,350,111		1,350,277
Selling and administrative expenses	0		0
Other income	0		0
Capital expenditures	178,761		189,568
Accounts Receivable, net	246,459		287,268
Inventories, net	962,739		897,753
Property, Plant and Equipment, net	1,642,555		1,564,702
Other assets	0		0
Unallocated Corporate
Net Sales	0		0
Depreciation and amortization	37,162		70,200
Segment operating profit	0		0
Selling and administrative expenses	(2,559,713)		(2,557,301)
Other income	100,901		65,255
Capital expenditures	65,641		154,339
Accounts Receivable, net	0		0
Inventories, net	0		0
Property, Plant and Equipment, net	631,488		603,009
Other assets	$ 9,404,599		$ 8,892,539

[1] Net of allowance of $140,000.

[2] Net of allowance of $150,000.