Specification Brand : RAW PRODUCTS CORP BulletPoint1 : Metric Sized Nylon Insert Lock Nuts - A2 Stainless Steel BulletPoint2 : Commonly referred to as Nylon Lock Nuts, Nyloc Nuts, or simply Lock Nuts BulletPoint3 : Nylon insert at top of nut prevents accidental loosening from vibration BulletPoint4 : A2 Stainless steel nuts designed for use with A2 Stainless Steel Bolts & Machine Screws BulletPoint5 : Corrosion & Rust Resistant Grade A2 Stainless Steel Locking Nuts in Metric Thread Sizes Color : Silver DriveSystem1 : External Hex DriveSystem2 : Cross ExteriorFinish : Plain ExternallyAssignedProductIdentifier1 : 756554527080 ExternallyAssignedProductIdentifier2 : 0756554527080 FinishType : Polished GradeRating : Grade 5 ItemName : Nylon Lock Nuts Nylock A2 Stainless Steel - 8M x 1.25 (13.0 Flats x 8.0 Height) Qty-250 ItemPackageQuantity : 1 ItemTypeKeyword : hardware-locknuts Manufacturer : RAW PRODUCTS CORP Material : Stainless Steel MeasurementSystem : Metric MetalType : Stainless Steel ModelNumber : Nylon Insert Lock Nut NumberOfItems : 250 NumberOfPieces : 250 PartNumber : 756554527080 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 : 2013-09-19T17:35:05.897Z Size : M8 x .25 Style : Nylon Lock Nut UnspscCode : 31161700