MARKET SECTORS AND MAJOR CUSTOMERS - Summary of Sales (Details) - Sales Revenue, Segment [Member]	3 Months Ended	9 Months Ended
Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Concentration Risk [Line Items]
Percentage of sales revenue	100.00%	100.00%	100.00%	100.00%
Aerospace & Defense
Concentration Risk [Line Items]
Percentage of sales revenue	59.00%	61.00%	60.00%	59.00%
Medical
Concentration Risk [Line Items]
Percentage of sales revenue	28.00%	22.00%	26.00%	22.00%
Industrial
Concentration Risk [Line Items]
Percentage of sales revenue	13.00%	17.00%	14.00%	19.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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