Specification Brand : RAW PRODUCTS CORP BulletPoint1 : High quality tamper proof security nuts BulletPoint2 : Tri Groove Security Nuts are made of Zamak 5 Zinc Alloy (95% Zinc, 4% Aluminum, 1% Copper). Zamak is an alloy of Zinc and Aluminium, sometimes also incorporating Magnesium and Copper. BulletPoint3 : The added copper in Zamak 5 increases the strength, hardness, and corrosion resistance of the alloy, but reduces its ductility and dimensional accuracy compared to other Zamak Alloys. BulletPoint4 : Tri Groove nuts are also referred to as T Groove, Trident Drive and Coned Trident Drive Nuts. BulletPoint5 : May only be installed and remove using tri groove or trident drivers or sockets - Sold Separately BulletPoint6 : Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays. Color : silver DriveSystem : Tri-Groove ExteriorFinish : Aluminum,Copper,Aluminium,Zinc ExternallyAssignedProductIdentifier1 : 720572143393 ExternallyAssignedProductIdentifier2 : 0720572143393 FinishType : Polished ItemName : Tri-Groove Tamper Proof Security Nuts Zamak 5 Zinc 3/8"-16 - QTY 25 ItemPackageDimensions_Height : 1.5 inches ItemPackageDimensions_Length : 2 inches ItemPackageDimensions_Width : 1 inches ItemPackageQuantity : 25 ItemTypeKeyword : tamper-resistant-nuts Manufacturer : RAW PRODUCTS CORP Material : Stainless Steel MeasurementSystem : Inch MetalType : Stainless Steel MetalType1 : Zinc MetalType2 : Aluminum MetalType3 : Copper MetalType4 : Magnesium NumberOfItems : 10 PartNumber : 6206-022-0044 ProductDescription : Tri Groove security nuts feature a tapered diameter, making the nuts resistant to gripping devices. Security nuts are installed using a special Tri Groove socket, which grips the indentations along the outside of the fastener to turn the nut along a thread. Tri Groove nuts are also referred to as T Groove, Trident Drive and Coned Trident Drive Nuts. ProductSiteLaunchDate : 2017-05-03T07:00:00.000Z Size : 1/4"-20 Thread Size SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1