Profile: The National Rolled Thread Die Co. manufactures finest flat thread rolling dies. Our products include style X cutoff dies, gimlet point dies, duplex dies and boltmaker dies. Our boltmaker dies assure a minimum die adjustment for diameter, match or taper during setup during manufacturing process. Our reversible duplex die is used basically for machine screws and can be furnished with unified & UNRor metric thread forms. We are accredited with ISO 9002 standards.