<!--431-->4mm Bayonet Clasp <!--431-->4mm Bayonet Clasp 4mm Bayonet Clasp 4 mm Bayonet clasp, pictured with a 5p £2.50 Out of stock. Bayonet clasp, wth twist and lock mechanism. In stainless steel, with a polished finish. Size: 18mm x 5mm - 4mm hole This stainless steel 4mm bayonet clasp is suitable for use with our 4mm rubber cord, 16mm tubular crin. Use super glue gel to fix the stringing material in place, Gorilla Super Glue Gel is recommended.