Domed cap nut, M4, DIN 1587, A2 stainless steel (AISI 304). Acorn/dome nut with M4 × 0.7 thread. Applications: decorative fastener finish where thread end must be covered, marine cabin trim, industrial control panel mounting. DIN 1587 dimensional standard; equivalent to ISO 4032 for base hex nut geometry. Pack sizes 10, 25, 100 stocked; specify quantity at RFQ.