... Product name: Bituminous paint square head screw.1. standard: AS, or according to our client's requirements.2. size ... ,SGS We can supply all kinds of bolts as the customer's drawings. >>Our strength on ... Permission License from the Ministry of Railways, P.R.China. 2.From 2006, we have manufactured the ... are being used. We exported to world markets, such as U.S.A., Canada, Cuba, Germany, Japan, Singapore ...