Specifications of Cap Nut:
1) Materials: Carbon Steel, Stainless Steel, Copper and Alloy Steel
2) Standards & Sizes of Cap Nut that we can offer (also provide non-standards sizes):
DIN917: M4 - M24
DIN986: M4 - M20

DIN1587: M4 - M24

Here is Cap Nut table of standard DIN917:

Here is Cap Nut table of standard DIN917:

Here are Cap Nut table of standard DIN1587:

Packaging of Cap Nut

Shanghai Metal Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.

1) Shanghai Metal Standard

2) Customization

Here is the Packing Information of DIN1587 Cap Nut: