Features: Premium saltwater corrosions resistant brass diving equipment screws with 1200+ hour salt sprays test performances, ideal for securely fastening buoyancy compensators and soft backplate systems in marine environments. Countersunk/semi round head designs, and 8.8+ grade strength for universals compatibility with most tanks straps and backplate connectors without customization. Trusted by professional divers and recreational enthusiasts for its vibrations resistant locking mechanism, meeting rigorous underwater gear safety standards during depth sea explorations. Engineered for scubas diving setups, these screws withstand intense water pressure, frequent equipment adjustments, and temperature fluctuations ( 2°C to 300°C) for reliability underwater operations. Includes corrosions inhibiting waterproof grease for easy maintenance—simply apply to threads annually to extend durability beyond 3 years, even with regular saltwater exposure. Specifications: Color:Two Choices Dimension:18×8mm/0.71×0.31in Component:Brasses Package Includes: 1pc Diving backpack systems screw note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.