Leland-Powell Fasteners, Inc.
Suppliers of industry standard and semi-standard parts ranging from hex heads to clevis pins from 3/16" through 5/8" diameter and 5-1/4" in length.
http://www.lelandpowell.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

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

Ideal Thread Gage Manufacturing Co, Inc.
Ideal Gage has been serving the Aerospace Industry for over fifty years with Competitive Pricing on all gages,Free 8 8 9 Thread Engineering Standard Plugs and Many Specials in Stock. High quality gage,aerospace gages,threaded plug gage,ring gage,taperlock thread plug gages,pin gage,plug gage,metric gage,agd style thread ring gages,
http://www.idealgage.com/

Reminc Conti
Licensors of the taptite family of thread rolling screws and bolts, providing assistance to end users and licensed manufacturers.
http://www.taptite.net/

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/

Pennoyer-Dodge Co.
Manufacture, recondition, and calibration of thread rings, thread plugs, and cylindrical gages. Custom Go and Not Go thread gauges and functional gaging.
http://www.pdgage.com

Odessa Manufacturing
Îäåññêèé çàâîä Êóçíå÷íî-Ïðåññîâûõ àâòîìàòîâ - ÊÏÀ Ìèðîâîé Ëèäåð â ïðîåêòèðîâàíèè è èçãîòîâëåíèè õîëîäíîâûñàäî÷íûõ, ðåçüáîíàêàòíûõ, ãàå÷íûõ, ãâîçäèëüíûõ àâòîìàòîâ äëÿ ïðîèçâîäñòâà ìåòèçíîé ïðîäóêöèè, òàêîé êàê: ãâîçäè, øóðóïû, âèíòû, áîëòû, çàêëåïêè, ìåòèçû, êðåïåæ, ñàìîðåçû, åâðîâèíò, äþáåëü, øïèëüêà è èçäåëèé ñïåöèàëüíîé ôîðìû.
http://www.jsc-pfm.com

Thread Check Inc
We offer a complete line of precision thread gauges, plain cylindrical gages, patented 3 wire measuring systems, powerful thread engineering software, master discs, gear measuring wires plus more with free technical support.
http://www.threadcheck.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