Specification Brand : Shorpioen BulletPoint1 : Designed for use in thin sheet metal when load bearing threads are necessary. The nut is pressed into a pre-drilled or punched hole, then force is applied to the top of the nut until the bearing surface at the outside diameter of the bottom of the nut is flush with the sheet metal to which it is attached. BulletPoint2 : Steel: Carbon steel Stainless Steel: Type 303 stainless passivated to ASTM A 380 BulletPoint3 : Nuts are case-hardened ExteriorFinish : Stainless Steel,Zinc,Carbon Steel,Steel,Metal ExternallyAssignedProductIdentifier1 : 0042805007723 ExternallyAssignedProductIdentifier2 : 042805007723 ItemName : 5/16-18-1 Self Clinching Nut Zinc (Pack Qty 4,000) BC-31-1NCL by Shorpioen ItemPackageQuantity : 4000 ItemTypeKeyword : self-clinching-nuts Manufacturer : Shorpioen LLC Material : Zinc MeasurementSystem : Inch MetalType : Carbon Steel MetalType1 : Stainless Steel MetalType2 : Carbon Steel MetalType3 : Alloy Steel ModelNumber : BC-31-1NCL NumberOfItems : 4000 PartNumber : BC-31-1NCL ProductDescription : PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc., may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape, which can vary from lot to lot. Designed for use in thin sheet metal when load bearing threads are necessary. The nut is pressed into a pre-drilled or punched hole, then force is applied to the top of the nut until the bearing surface at the outside diameter of the bottom of the nut is flush with the sheet metal to which it is attached. . Steel: Carbon steel Stainless Steel: Type 303 stainless passivated to ASTM A 380 . Nuts are case-hardened. ProductSiteLaunchDate : 2016-11-17T16:11:03.457Z Size : 5/16-18-1 Style : Compact SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnspscCode : 31160000