Chrome Alloy Button Dies and Die Nuts
Chrome Button Die BSW-1/4x20
Stock Code :
BORD4808-1-4-1D
Tools & Gear Taps & Dies Chrome Alloy Button Dies and Die Nuts
BSWBRITISH STANDARD WHITWORTH This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84:1956. The thread angle for BSW is 55 deg; as opposed to 60 deg; in Metric and Unified threads.
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