Specification Brand : RAW PRODUCTS CORP BulletPoint1 : Nylon Insert Jam Lock Nuts in Grade 18-8 Stainless Steel BulletPoint2 : Thin lock nuts roughly 1/2 the thickness of standard hex 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 DriveSystem1 : External Hex DriveSystem2 : Cross ExteriorFinish : Plain ExternallyAssignedProductIdentifier1 : 756554522269 ExternallyAssignedProductIdentifier2 : 0756554522269 GradeRating : Grade 5 ItemName : Nylon Hex Jam Lock Nut Nylock 18-8 Stainless Steel - 5/8-18 (.940 Flats x .225 Height) Qty-25 ItemPackageQuantity : 1 ItemTypeKeyword : hex-nuts Manufacturer : RAW PRODUCTS CORP Material : Stainless Steel MeasurementSystem : English/Standard MetalType : Stainless Steel ModelNumber : Nylon Insert Lock Nut NumberOfItems : 25 NumberOfPieces : 25 PartNumber : 756554522269 ProductDescription : A Nylon Insert Jam Lock Nut is a low profile lock nut used for fastening to a bolt when mechanically joining materials together. Jam nuts are typically half the height of a standard hex nut. The nylon insert located at the top of the nut prevent loosening from vibration. 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 : 2013-09-19T17:47:52.109Z Size : 5/8"-18 Style : Nylon Lock Nut SupplierDeclaredDgHzRegulation : unknown UnspscCode : 31161700