Overview:These stainless steel bulkhead nuts are designed for use w/ the long bulkhead fitttings. These nuts have a flange that is more attractive than a traditional nut & washer.Features: Long Style Bulkhead Fitting Material: 304 Stainless Steel w/ Natural Finish Flanged Hex & Bulkhead Nuts – More Attractive Than Standard Hex & Washer AN Flare on Both Ends Fits Through Frame Tubing – From 1.5” to 2.0” Thick Sold Individually w/ Matching Flanged Bulkhead Nut Ideal for Use on Street Rod & Provides a Custom Look w/o Brackets or Tabs Ideal for Use on Brakes, Fuel System, Transmission Cooler & Other Plumbing Systems Application: Year Make Model Submodel Engine Size Universal Specs: Adapter AN Size 3 AN MALE Adapter AN Size ( A ) 3 AN MALE Adapter Type Bulkhead Nut Brand Earls Diameter .636" Emission Code 5 Finish Natural Material Stainless Steel Product Line Premium Product Type Bulkhead Nut Quantity Per Pkg. 2 Thread Size 3/8"-24 Wrench Size 9/16"