Lyn-Tron
Manufacturer of spacers, standoffs, jackscrews, captive panel screws, plastic hardware, and handles with information on products, service, cateers and contacts.
http://www.lyntron.com/

Precision Electronic Hardware
Precision Electronics Hardware ships standard parts such as standoffs, spacers and jackscrews from stock. Others are manufactured to order and we ensure quick delivery of all parts. We also supply electronic hardware from customer drawings
http://www.precisionelectronic.com/

RAF Electronic Hardware
The industry's widest selection of electronic hardware components and fasteners including standoffs, swage standoffs, spacers, captive panel screws, precision shoulder screws, thumb screws, handles and handle hardware, circuit board supports, jack screws, and non-metallic washers in metric and American standard dimensions.
http://www.rafhdwe.com/