Rectangular horn nuts Rectangular horn nuts as in BS 1782 & BS 2464 specifications, including 2 3/4 x 6UNS, 1/32 x 6UNS and 4 x 6UNS threads. Other available products in this category Roman Seliger MEXE 900 elbows Suction and delivery Hydrant standpipe feet, Re-useable hose tails