The Mittler Bros. GN Hub Cap Complete is the dust cap assembly for 40-spline Grand National floater rear hub applications. It seals the outboard end of the hub to protect the axle bearing, O-ring, and hub internals from dirt, debris, and moisture. Sold as a complete cap — the right replacement or spare for 40-spline GN hub setups.
Sold as a complete kit — includes the hub cap (1400-054), three 1/4-20×3/4″ SHCS hub cap bolts (SKU 1400-505), and O-ring 132 (SKU 1400-515). Everything needed to install or replace the hub cap on a 40-spline GN hub. Also included in the Mittler Bros. GN Rear Hub Accessory Kit (SKU 1400-400-R / 1400-400-L). For the 24-spline version, see SKU 1400-009. A cap-only (no O-ring or bolts) version for 40-spline is also available (SKU 1400-051). Made in the USA.
