Make tools, fittings, and small metal pieces used in other products.
Tests mat of fiberglass insulation material to determine if product conforms to specifications: Cuts sample of mat, using knife or razor blade and template, and weighs mat on balance scale. Burns weighed sample in miniature oven to remove binder, weighs burned sample, and computes percentage of binder in sample, using slide rule. Suspends sample of mat in styrene solution and times disintegration of sample to determine solubility of binder. Places sample between plates of thickness gauge and reads dial indicator before and after application of pressure to gauge to determine thickness with or without stress. Records test results on mat-testing record.