Equity Earnings (Loss) of Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Apr. 01, 2018	Apr. 02, 2017
Summarized statements of operations
Equity Earnings (Loss) of Joint Ventures	$ 619	$ (163)	$ 3,118	$ 128
VAST LLC
Summarized statements of operations
Net Sales	44,133	30,967	127,976	89,983
Cost of Goods Sold	34,063	24,776	98,339	71,993
Gross (Loss) Profit	10,070	6,191	29,637	17,990
Engineering, Selling and Administrative Expense	7,429	5,067	19,775	14,294
Income (Loss) From Operations	2,641	1,124	9,862	3,696
Other Income (Expense), net	163	259	949	1,430
Income before Provision for Income Taxes	2,804	1,383	10,811	5,126
Provision for Income Taxes	683	50	1,367	627
Net Income (Loss)	2,121	1,333	9,444	4,499
STRATTEC’s Share of VAST LLC Net Income	707	445	3,148	1,500
Intercompany Profit Elimination	(4)	6	(6)	(17)
Equity Earnings (Loss) of Joint Ventures	703	451	3,142	1,483
SAL LLC
Summarized statements of operations
Net Sales		102	227	298
Cost of Goods Sold		244	408	428
Gross (Loss) Profit		(142)	(181)	(130)
Engineering, Selling and Administrative Expense	19	425	(6)	1,131
Income (Loss) From Operations	(19)	(567)	(175)	(1,261)
Other Income (Expense), net	(65)	(47)	(194)	(94)
Net Income (Loss)	(84)	(614)	(369)	(1,355)
Equity Earnings (Loss) of Joint Ventures	$ (84)	$ (614)	$ (24)	$ (1,355)