Profile: Shree Ashapura Steel Centre is a manufacturer, importer & exporter of nuts & bolts, stainless steel washer, and stainless steel pipes. We are an ISO 9001:2015 certified company. Our products include stainless steel seamless pipe, high nickel alloy seamless pipes, alloy seamless pipe, titanium seamless pipe, and cupro nickel seamless pipes. A flange bolt has a circular rim under its head that mimics a washer. It spreads the weight. A frame bolt is also another term for a non-serrated flange bolt. They are serrated to keep them from loosening. They utilize a hex head with wrenches.