Specification Brand : MCMASKE BulletPoint1 : High Quality 8 Kinds 304Stainless Steel SAE #4-40 #6-32 #8-32 #10-24 #10-32 1/4"-20 5/16"-18 3/8"-16 Nylon-Insert Locknuts/Elastic stop nuts Assortment Kit Total 225 pieces BulletPoint2 : Use these hex Nylon-Insert Locknuts for general purpose fastening applications.A nylon insert grips threads to resist loosening,Also known as elastic stop nuts,these can be used as a stop BulletPoint3 : The assortments contain the following sizes:#4-40 UNC---50PCS;#6-32 UNC---40PCS;#8-32 UNC---30PCS;#10-24 UNC----30PCS;#10-32 UNF----30PCS ;1/4"-20 UNC---20PCS;5/16"-18 UNC---15PCS;3/8"-16 UNC---10PCS BulletPoint4 : All products are made of 304 Stainless Steel and Nylon;304 stainless Steel are chemical resistant and may be mildly magnetic BulletPoint5 : The Nylon-Insert Locknuts kit includes most common SAE standard sizes so you can easily replace a lost nut;Packed in a plastic box,Easy to install and use Color : Silver DriveSystem : External Hex DriveSystem1 : Slotted DriveSystem2 : Cross ExteriorFinish : Stainless Steel ExteriorFinish1 : Silver ExteriorFinish2 : Nickel ExternallyAssignedProductIdentifier1 : 738634035180 ExternallyAssignedProductIdentifier2 : 0738634035180 FinishType : Polished GradeRating : Commercial ItemName : MCMASKE 225PCS #4-40 to 3/8"-16 Stainless Steel Nylon-Insert Locknuts/Elastic Stop Nuts Assortment Kit,for #4-40#6-32#8-32#10-24#10-32 1/4"-20 5/16"-18 3/8"-16 Screws/Bolts ItemPackageDimensions_Height : 21.1074 centimeters ItemPackageDimensions_Length : 3.302 centimeters ItemPackageDimensions_Width : 13.4112 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : hardware-locknuts Manufacturer : MCMASKE Material : Stainless Steel 304 Material1 : Nickel Material2 : Zinc MeasurementSystem : Inch MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Stainless Steel MetalType1 : Alloy Steel MetalType2 : Copper ModelNumber : NHN#4TO3/8225P NumberOfItems : 1 NumberOfPieces : 225 PartNumber : NHN#4TO3/8225P ProductDescription : Use these hex nuts for general purpose fastening applications A nylon insert grips threads to resist loosening Also known as elastic stop nuts,these can be used as a stop or a spacer for rotating parts Nuts can be removed without damaging threads They are reusable(unless noted),but their holding power lessens with each use Nylon absorbs moisture,which can cause the insert to become brittle over time in wet environments Package include: 225pcs 8 Sizes #4-40 NUC #6-32 NUC #8-32 NUC #10-24 NUC #10-32NUF 1/4"-20 NUC 5/16"-18 NUC 3/8"-16 UNC Hex Nylon-Insert Locknuts Assortment Kit;Come with the plastic box: List(Type,Quantity): Nylon-Insert Locknuts #4-40 UNC 50PCS Nylon-Insert Locknuts #6-32 UNC 40PCS Nylon-Insert Locknuts #8-32 UNC 30PCS Nylon-Insert Locknuts #10-24 UNF 30PCS Nylon-Insert Locknuts #10-32 UNF 30PCS Nylon-Insert Locknuts 1/4"-20 NUC 20PCS Nylon-Insert Locknuts 5/16"-18 UNC 15PCS Nylon-Insert Locknuts 3/8"-16 UNC 10PCS Packing contents: MCMASKE 225PCS 8 Kinds #4-40 to 3/8"-16 304 Stainless Steel Hex Nylon-Insert Locknuts/Elastic stop nuts Assortment kit Packed in a plastic box