... 4Certificate:ISO9001:2008,SGS Railway fasteners black bituminous paint screw spike >> Specification of the product in picture above: 1. Product ... name: Bituminous paint square head screw spike.2. standard: according to our client's requirements.3. ... : yellow zinc, or by clients (plain, black, HDG, Dacron, etc.) 7. packaging : gunny-bag + wooden box, etc. 8. Proven technique & ...