https://merritt.bigcartel.com/product/theory-3-8-26tpi-chromoly-cone-nuts-pair-for-se-rear-hubs
THEORY 3/8"-26TPI CHROMOLY CONE NUTS PAIR FOR SE REAR HUBS | Merritt
Cone nut pair for 3/8" 26TPI solid axle for SE Cassette hub Fits any single speed V-brake bikes like Big Rippers, Big Flyers, So Cal's, Blocks Flyers and...