Thread Size	Weight per 100 kg	Part Number
M6	0.25	HN-01
M8	0.8	HN-02
M10	1.15	HN-03
M12	1.65	HN-04

Material: Brass.  

Thread Size	Weight per 100 kg	Part Number
M6	0.25	HN-05
M8	0.8	HN-06
M10	1.15	HN-07
M12	1.65	HN-08

Material: Stainless Steel.