ARP fasteners Hex Nut With Flange, Chrome Moly AR200-8631 Cooling Part Number: AR400-8539

Part Number: AR400-8539

Part Number: AR207-4202

Note: Not compatible for power steering and automatic transmission line applications

Part Number: AR300-8243

5mm) thick machined 6061 T-6 aluminium with steel threaded inserts for the header bolts

ARP fasteners Hex Nut With Flange, Chrome Moly AR200-8631 Cooling Part Number: AR400-8539Hex Nut With Flange, Chrome Moly1 4" UNF Thread x 7 16" Socket (10 Pack) AR200 8631 200 8631 Constructed from the finest aerospace quality materials, these hex nuts are available in most sizes to meet your needs. All hex nuts meet ARP's exacting quality control standards and are black oxided. All hex nuts are rated 180,000 psi tensile strength.