1.Pierce nut class range is from 8 to 9. 2.Thread size 6H/6E, metric or 2B standard. 3. Pange of thread: M4-M12. 4. Plating is available by customer request, e.g. S437, S438,S439, MFZN2C, GM6076, BROSE, ZINC, ZINC TRI CLEAR. 5. We can supply a full installation tooling & replacement parts. Standard Packs available: 13¡¨ spool=5000pcs / 10¡¨ spool=2500pcs