Right helical type, 94x48, hole diameter 19 mm, Star, made in Italy

Right and left folded type, 98x40mm, hole diameter 19mm, original Stella

Length 28 mm, head diameter 30 mm, thickness 16 mm, thread M10x13, Original Kuhn

narrow type ribbed section flared below, width 51mm, center distance 30.8mm, height 76mm

Sezione rigata tipo largo, larghezza 76mm, interasse 51,5 mm, fori 5,5 mm, altezza 81mm

Sezione rigata tipo largo, larghezza 76mm, interasse 52,5 mm, fori 5,5 mm, altezza 81mm

Ribbed section narrow type 2, width 51mm, center distance 31mm, length 80 mm

rifled section wide type 212 SF-3, width 76mm, center distance 51mm, height 81mm