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OneMonroe’s Lyn-tron brand Plain Thumb Screws are proudly manufactured in the USA, offering precision-engineered performance and reliability for a wide range of industrial and electronic applications. Designed for tool-free operation, these screws feature a knurled head for easy manual tightening and loosening, making them ideal for quick adjustments and frequent assembly and disassembly.

Crafted from high-quality materials and built to exacting standards, Lyn-tron Plain Thumb Screws provide consistent grip and durability even in demanding environments. Whether used in enclosures, panels, or machinery, these thumb screws deliver both convenience and dependable fastening. Available in a variety of thread sizes and lengths, they are the perfect choice when ease of use and American-made quality are critical.

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Unit of Measure
1 2 3 

Item #

Material

OD

Head Diameter

Male Thread

OAL

Head Length

Thread Length

Part Description

Quantity
ST7624-00 N/A Steel N/A 5/16 N/A 5/16 N/A 6-32 N/A 1/2 N/A 3/16 N/A 5/16 N/A 6-32 Male Thread x 5/16 Thread Length Steel Plain Thumb Screw
ST7625-00 N/A Steel N/A 5/16 N/A 5/16 N/A 6-32 N/A 9/16 N/A 3/16 N/A 3/8 N/A 6-32 Male Thread x 3/8 Thread Length Steel Plain Thumb Screw
ST7626-00 N/A Steel N/A 5/16 N/A 5/16 N/A 6-32 N/A 5/8 N/A 3/16 N/A 7/16 N/A 6-32 Male Thread x 7/16 Thread Length Steel Plain Thumb Screw
ST7627-00 N/A Steel N/A 5/16 N/A 5/16 N/A 6-32 N/A 11/16 N/A 3/16 N/A 1/2 N/A 6-32 Male Thread x 1/2 Thread Length Steel Plain Thumb Screw
ST7628-00 N/A Steel N/A 3/8 N/A 3/8 N/A 8-32 N/A 9/16 N/A 3/16 N/A 3/8 N/A 8-32 Male Thread x 3/8 Thread Length Steel Plain Thumb Screw
ST7629-00 N/A Steel N/A 3/8 N/A 3/8 N/A 8-32 N/A 5/8 N/A 3/16 N/A 7/16 N/A 8-32 Male Thread x 7/16 Thread Length Steel Plain Thumb Screw
ST7630-00 N/A Steel N/A 3/8 N/A 3/8 N/A 8-32 N/A 11/16 N/A 3/16 N/A 1/2 N/A 8-32 Male Thread x 1/2 Thread Length Steel Plain Thumb Screw
ST7631-00 N/A Steel N/A 3/8 N/A 3/8 N/A 8-32 N/A 3/4 N/A 3/16 N/A 9/16 N/A 8-32 Male Thread x 9/16 Thread Length Steel Plain Thumb Screw
ST7632-00 N/A Steel N/A 3/8 N/A 3/8 N/A 8-32 N/A 13/16 N/A 3/16 N/A 5/8 N/A 8-32 Male Thread x 5/8 Thread Length Steel Plain Thumb Screw
ST7633-00 N/A Steel N/A 7/16 N/A 7/16 N/A 10-32 N/A 9/16 N/A 3/16 N/A 3/8 N/A 10-32 Male Thread x 3/8 Thread Length Steel Plain Thumb Screw
ST7634-00 N/A Steel N/A 7/16 N/A 7/16 N/A 10-32 N/A 5/8 N/A 3/16 N/A 7/16 N/A 10-32 Male Thread x 7/16 Thread Length Steel Plain Thumb Screw
ST7635-00 N/A Steel N/A 7/16 N/A 7/16 N/A 10-32 N/A 11/16 N/A 3/16 N/A 1/2 N/A 10-32 Male Thread x 1/2 Thread Length Steel Plain Thumb Screw
ST7636-00 N/A Steel N/A 7/16 N/A 7/16 N/A 10-32 N/A 3/4 N/A 3/16 N/A 9/16 N/A 10-32 Male Thread x 9/16 Thread Length Steel Plain Thumb Screw
ST7637-00 N/A Steel N/A 7/16 N/A 7/16 N/A 10-32 N/A 13/16 N/A 3/16 N/A 5/8 N/A 10-32 Male Thread x 5/8 Thread Length Steel Plain Thumb Screw
ST7638-00 N/A Steel N/A 1/2 N/A 1/2 N/A 1/4-20 N/A 3/4 N/A 1/4 N/A 1/2 N/A 1/4-20 Male Thread x 1/2 Thread Length Steel Plain Thumb Screw
ST7639-00 N/A Steel N/A 1/2 N/A 1/2 N/A 1/4-20 N/A 13/16 N/A 1/4 N/A 9/16 N/A 1/4-20 Male Thread x 9/16 Thread Length Steel Plain Thumb Screw
ST7640-00 N/A Steel N/A 1/2 N/A 1/2 N/A 1/4-20 N/A 7/8 N/A 1/4 N/A 5/8 N/A 1/4-20 Male Thread x 5/8 Thread Length Steel Plain Thumb Screw
ST7641-00 N/A Steel N/A 1/2 N/A 1/2 N/A 1/4-20 N/A 15/16 N/A 1/4 N/A 11/16 N/A 1/4-20 Male Thread x 11/16 Thread Length Steel Plain Thumb Screw
ST7642-00 N/A Steel N/A 1/2 N/A 1/2 N/A 1/4-20 N/A 1 N/A 1/4 N/A 3/4 N/A 1/4-20 Male Thread x 3/4 Thread Length Steel Plain Thumb Screw
Unit of Measure
1 2 3