The WHLAXLE19 axle is a style axle made of 4140 HT steel alloy. This axle has a 0.75 inch diameter bearing surface. The axle has .898 inch spacing between the four 0.194 inch bolt holes on a 1.27 inch reference circle. This axle assembly comes with the AN8 axle nut.
Matco Aircraft Landing Systems axles that are aluminum are black anodized and steel axles are yellow zinc.