1075 Spring Steel Round Shim, Unpolished (Mill) Finish, H08 Temper, AMS 5120H/QQ-S-700, 0.032" Thickness, 0.17" ID, 0.249" OD (Pack of 25)

The 1075 spring steel round shim, also known as a die button shim, has an unpolished (mill) surface, meets SAE Aerospace Material Specifications AMS 5120H and AMS QQ-S-700, and has a standard tolerance. The 1075 spring steel grade is harder and retains its shape better than low-carbon steel. It is magnetic.

Shims are thin pieces of material placed between objects for a variety of uses, including added support, improved leveling, increased insulation, tighter seals, or better spacing. They also can be used to fill gaps between machine parts that are prone to wear. Shapes include round, notched, and slotted.

Corrosion resistance describes the material's ability to prevent deterioration caused by atmosphere, moisture, or other medium. Wear resistance indicates the ability to prevent surface damage caused by contact with other surfaces. Hardness (commonly measured as indentation hardness) describes its resistance to permanent surface deformation.