BMW E30 Upgraded Differential Bushing Hardware Kit (Grade 10.9)

This bolt kit matches OEM measurements but is far superior when it comes to corrosion resistance, strength and durability. Class 10.9 steel is at least 25% stronger than medium-strength steel screws. The flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. Black-Phosphate Bolt Black-Oxide Nut Class 10.9 Steel Flanged Hex Head Black corrosion-resistant-coated steel is more corrosion resistant in wet environments than zinc-plated steel  Screws meet ISO 898-1 and comply with specifications and testing requirements for material quality. Kit Includes: (x1) 10.9 Grade Flanged Hex Head Bolt (x1) 10.9 Grade Flanged Hex Head Nut