Schedule of Segment Reporting Information (Details) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Net sales		$ 36,174,604	$ 37,135,207
Depreciation		1,261,446	1,262,725
Segment operating profit		4,674,131	4,980,502
Selling and administrative expenses		(2,186,933)	(2,114,893)
Other income		44,443	41,280
Capital expenditures		2,104,267	1,735,041
Accounts receivable, net	[1]	5,438,332	5,669,654
Inventories, net		4,538,212	5,162,474
Property, plant and equipment, net		11,698,443	10,877,995
Other assets		8,448,150	7,257,512
Fastener
Net sales		32,590,015	34,116,301
Depreciation		1,101,210	1,123,818
Segment operating profit		3,692,805	4,234,820
Selling and administrative expenses		0	0
Other income		0	0
Capital expenditures		1,545,533	1,667,248
Accounts receivable, net		5,084,535	5,362,201
Inventories, net		3,549,655	4,308,987
Property, plant and equipment, net		9,732,333	9,267,529
Other assets		0	0
Assembly Equipment
Net sales		3,584,589	3,018,906
Depreciation		80,191	65,621
Segment operating profit		981,326	745,682
Selling and administrative expenses		0	0
Other income		0	0
Capital expenditures		455,139	42,411
Accounts receivable, net		353,797	307,453
Inventories, net		988,557	853,487
Property, plant and equipment, net		1,469,010	1,113,923
Other assets		0	0
Unallocated Corporate
Net sales		0	0
Depreciation		80,045	73,286
Segment operating profit		0	0
Selling and administrative expenses		(2,186,933)	(2,114,893)
Other income		44,443	41,280
Capital expenditures		103,595	25,382
Accounts receivable, net		0	0
Inventories, net		0	0
Property, plant and equipment, net		497,100	496,543
Other assets		$ 8,448,150	$ 7,257,512

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