Metric Countersunk Slot Machine Screws are made to DIN963 and available in 304 and 316 Grade. Imperial sizes of Countersunk Slot Machine Screws are also available in UNC and BSW thread patterns and in 304 and 316 grades, note UNC and BSW are interchangeable in all sizes except 1/2 inch and the angle of the countersink. Longer lengths with Countersunk Slot drive heads are also available as Track Bolts.
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