Mating Screw 1/4-20 X .500 "6 Lobe" Washer Head T30 Drive | SCSupply
Accurate helps Harmon, Inc. with their Aspen Art Museum project - AMPG - Shoulder Screws, Shoulder Bolts, Sex Bolts, Flat Washers, Machine Screws and other fasteners
One Way Sex Bolt #10-24, Nut 1" & Screw 3/4” (SS18-8) - 10sets | eBay
Barrel Nuts | Sex Bolts | Chicago Screws | Interscrews | Fastenright
Mating Bolt / Nut, 3/8-16" x 1"
Mating screws, One way serrated truss head, Stainless steel 18-8, 1/4" x 1/4" shoulder (#10-24 x 1/2" thread) - Bolt Depot
PennEngineering's PEMHEX locknuts' hexagonal insert prevents mating screws from loosening
3/8 x 1-9/16 Tamper-Resistant Architectural Series Sex Bolts, 37N156SAS3 | Tanner