The WHLAXLE1 axle is a FLANGE style axle made of 2024-T351 AL alloy. This axle has a 1.25 inch diameter bearing surface. The axle has 1.375 inch spacing between the four 0.257 inch bolt holes on a 1.944 reference circle. This axle assembly comes with the AN1 axle nut.
MATCO mfg axles that are aluminum are black anodized and steel axles are yellow zinc.