We are a manufacturer in the US and we routinely use the following fastener in our products:#10 - 24 X .5 socket cap screw, material = stainless steel, finish = black oxide finish, nylon patch (10,000 - 20,000 pieces per year).Here is more detailed info:Head Style: StandardMaterial Type: stainless steel i.e. 316, 304, 18-8Finish: Black-OxideClass: Not RatedDrive Style: Hex SocketInch Thread Size: 10-24Length: 1/2Thread Length: Fully ThreadedThread Direction: Right HandedTip Type: PlainSelf-Locking Method: Nylon PatchScrew Quantity: Individual ScrewHex Size: 5/32Head Diameter: .312Head Height: .190Could you please contact me and help me obtain a quote from your company for the above mentioned item?PLEASE SEE ATTACHED FILES!Country:United States