Specification Brand : RAW PRODUCTS CORP BulletPoint1 : Nylon Insert Lock Nuts in Grade 18-8 Stainless Steel BulletPoint2 : Commonly referred to as Nylon Lock Nuts, Nyloc Nuts, or simply Lock Nuts BulletPoint3 : 18-8 Stainless steel nuts designed for use with 18-8 Stainless Steel Bolts & Machine Screws BulletPoint4 : Nylon insert at top of nut prevents accidental loosening from vibration BulletPoint5 : Durable, Corrosion & Rust Resistant 18-8 Stainless Steel Color : Silver DriveSystem : External Hex ExteriorFinish : Plain ExternallyAssignedProductIdentifier1 : 756554521026 ExternallyAssignedProductIdentifier2 : 0756554521026 GradeRating : Grade 5 ItemName : Nylon Lock Nut Nylock 18-8 Stainless Steel - 5/8-18 (.940 Flats x .593 Height) Qty-25 ItemPackageQuantity : 1 ItemTypeKeyword : hardware-locknuts Manufacturer : RAW PRODUCTS CORP Material : Stainless Steel MeasurementSystem : English/Standard MetalType : Stainless Steel ModelNumber : Nylon Insert Lock Nut NumberOfItems : 25 NumberOfPieces : 25 PartNumber : 756554521026 ProductDescription : A nylon insert lock nut is hex shaped, internally threaded with a nylon insert. The nylon material prevents loosening from vibration and cross threads to stop the nut from backing off of the fastener. The insert deforms elastically over the threads of the screw, but threads are not cut into the nylon. The nylon insert locks the nut in two ways. First, it forces the bottom face of the screw threads against the top face of the nut threads, increasing the friction between the two. Second, the nylon applies a compressive force against the screw itself. ProductSiteLaunchDate : 2013-09-19T17:43:26.929Z Size : 5/8"-18 Style : Nylon Lock Nut UnspscCode : 31161700