Products › Beer Nut Cap Image 1 of 1 Beer Nut Cap $8.00 304 Stainless Steel For capping off all 5/8" BSP (beer thread) components. Quantity: Add To Cart Added! 304 Stainless Steel For capping off all 5/8" BSP (beer thread) components. You Might Also Like Probe Washer for Sanke-D Keg Coupler $2.00 Sanke Coupler Replacement Seal Kit - Komos D-Style & S-Style $9.00 Ball Lock to Sanke Adapter $15.00 Sold Out Beer Nut - Wing Nut $3.00 Check Ball for Sanke Coupler $2.50