Roton Products, Inc.
Manufacturer of high quality lead screws, acme screws, ball screws, worms, nuts, and other power transmission thread forms. Most items in stock and available for purchase on-line.
http://www.roton.com

Nook Industries
Nook Industries manufactures linear actuators for the motion control industry. We offer: ball screws, acme thread screws, worm gear screw jacks, linear slide systems, lead screws, electric cylinders, linear guide components and more.
http://www.nookindustries.com/

Bryce Fastener
Bryce Fastener Inc. is the World Leader in Security Screws, Security Fasteners, and Tamper Resistant Screws. Call Today: 1-800-558-1082
http://www.brycefastener.com

Chu Hua Industrial Co. Ltd.
Chu Hua is a ISO 9002 factory,and laboratory has been accrediting for 8 years. We can offer automobile parts, structure and electronic Parts. We have large capacity on production and warehouse. Welcome your visiting.....
http://www.chuhua.com.tw

Reliable Fasteners Pvt Ltd.
Manufacturers and exporters of fasteners, hex head bolts/screws, lag bolts, machine screws, self tapping screws, rivets, nails and nuts.
http://relfa.com

Lead Screws International, Inc.
Lead Screws International: Design, Manufacture and Repair of all types of Screw Assemblies
http://www.lsitvc.com

Double-double precision
Fortran 90 code by Claire Moreau-Finot for double-double precision arithmetic. That is about a hundred bits of precision with a floating point notation. The library computes the exponential function radix 2 and e, the cosine and the sine.
http://perso.ens-lyon.fr/marc.daumas/SoftArith/ddouble.php?langue=en

Peek Metric Screws
NetMotion, Inc. web site
http://www.netmotion.com/

Jewelers Machinists Co. Inc.
CNC Precision Thread Grinding can handle materials such as resin and silicone with the same precision
http://www.threadgrind.com/

K-Tech Mfg., Inc
Manufacturer of standard and specialty cold-headed fasteners including studs, bolts, wood screws and thread rolling screws.
http://www.ktmi.com