Spohn Performance 14019274-988 Features:

Don't use your old rusty mounting bolts when installing new struts on your 1982-1992 GM F-Body Camaro and Firebird (if you managed to get them removed without breaking!).
Our strut to spindle mounting hardware kit includes:
(4) 16mm Grade 10.9 bolts (silver zinc plated)
(4) 16mm heavy flanged steel lock nuts (silver zinc plated)
(4) 16mm extra heavy flat washers (silver zinc plated)
The strut to upper strut mount nuts are no longer available from GM. They secure the top of the front struts to the upper strut mounts on the 1982-1992 GM F-Body Camaro and Firebird.
The bottom of the nut has a special conical shape that seats into the bearing on the upper strut mount, so a regular nut, or a regular flange nut will not work.
These were discontinued long ago by GM. These nuts are an exact replica of the OEM GM hardware. They are forged from 4130 chrome moly and then CNC machined. Finally, they are silver zinc plated for corrosion protection.
Sold as a complete kit - Quantity 1 will do both front struts

• Grade 10.9
• Exact dimensional copy of the GM factory strut to upper strut mount nuts
• Silver zinc plated for corrosion protection