Need to replace 6no of these fixings on my Permit Stinson.

The reference for the assembly is A0750130-3 at $85 on Spruce but it's just the nuts n bolts I need.

Does anyone know a reference for these fixings?
TIA

The reference for the assembly is A0750130-3 at $85 on Spruce but it's just the nuts n bolts I need.

Does anyone know a reference for these fixings?
TIA