Plain Thumb Screw On OneMonroe

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.

Item #	Material	OD	Head Diameter	Male Thread	OAL	Head Length	Thread Length	Part Description
BR7620-00	N/A Brass	N/A 5/16	N/A 5/16	N/A 4-40	N/A 1/2	N/A 3/16	N/A 5/16	N/A 4-40 Male Thread x 5/16 Thread Length Brass Plain Thumb Screw
BR7621-00	N/A Brass	N/A 5/16	N/A 5/16	N/A 4-40	N/A 9/16	N/A 3/16	N/A 3/8	N/A 4-40 Male Thread x 3/8 Thread Length Brass Plain Thumb Screw
BR7622-00	N/A Brass	N/A 5/16	N/A 5/16	N/A 4-40	N/A 5/8	N/A 3/16	N/A 7/16	N/A 4-40 Male Thread x 7/16 Thread Length Brass Plain Thumb Screw
BR7623-00	N/A Brass	N/A 5/16	N/A 5/16	N/A 4-40	N/A 11/16	N/A 3/16	N/A 1/2	N/A 4-40 Male Thread x 1/2 Thread Length Brass Plain Thumb Screw
BR7624-00	N/A Brass	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 Brass Plain Thumb Screw
BR7625-00	N/A Brass	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 Brass Plain Thumb Screw
BR7626-00	N/A Brass	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 Brass Plain Thumb Screw
BR7627-00	N/A Brass	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 Brass Plain Thumb Screw
BR7628-00	N/A Brass	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 Brass Plain Thumb Screw
BR7629-00	N/A Brass	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 Brass Plain Thumb Screw
BR7630-00	N/A Brass	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 Brass Plain Thumb Screw
BR7631-00	N/A Brass	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 Brass Plain Thumb Screw
BR7632-00	N/A Brass	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 Brass Plain Thumb Screw
BR7633-00	N/A Brass	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 Brass Plain Thumb Screw
BR7634-00	N/A Brass	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 Brass Plain Thumb Screw
BR7635-00	N/A Brass	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 Brass Plain Thumb Screw
BR7636-00	N/A Brass	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 Brass Plain Thumb Screw
BR7637-00	N/A Brass	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 Brass Plain Thumb Screw
BR7638-00	N/A Brass	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 Brass Plain Thumb Screw
BR7639-00	N/A Brass	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 Brass Plain Thumb Screw
BR7640-00	N/A Brass	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 Brass Plain Thumb Screw
BR7641-00	N/A Brass	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 Brass Plain Thumb Screw
BR7642-00	N/A Brass	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 Brass Plain Thumb Screw
SS7620-00	N/A Stainless Steel	N/A 5/16	N/A 5/16	N/A 4-40	N/A 1/2	N/A 3/16	N/A 5/16	N/A 4-40 Male Thread x 5/16 Thread Length Stainless Steel Plain Thumb Screw
SS7621-00	N/A Stainless Steel	N/A 5/16	N/A 5/16	N/A 4-40	N/A 9/16	N/A 3/16	N/A 3/8	N/A 4-40 Male Thread x 3/8 Thread Length Stainless Steel Plain Thumb Screw

N/A Brass

N/A 5/16

N/A 4-40

N/A 1/2

N/A 3/16

N/A 5/16

N/A 4-40 Male Thread x 5/16 Thread Length Brass Plain Thumb Screw

BR7621-00

N/A Brass

N/A 5/16

N/A 4-40

N/A 9/16

N/A 3/16

N/A 3/8

N/A 4-40 Male Thread x 3/8 Thread Length Brass Plain Thumb Screw

BR7622-00

N/A Brass

N/A 5/16

N/A 4-40

N/A 5/8

N/A 3/16

N/A 7/16

N/A 4-40 Male Thread x 7/16 Thread Length Brass Plain Thumb Screw

BR7623-00

N/A Brass

N/A 5/16

N/A 4-40

N/A 11/16

N/A 3/16

N/A 1/2

N/A 4-40 Male Thread x 1/2 Thread Length Brass Plain Thumb Screw

BR7624-00

N/A Brass

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 Brass Plain Thumb Screw

BR7625-00

N/A Brass

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 Brass Plain Thumb Screw

BR7626-00

N/A Brass

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 Brass Plain Thumb Screw

BR7627-00

N/A Brass

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 Brass Plain Thumb Screw

BR7628-00

N/A Brass

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 Brass Plain Thumb Screw

BR7629-00

N/A Brass

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 Brass Plain Thumb Screw

BR7630-00

N/A Brass

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 Brass Plain Thumb Screw

BR7631-00

N/A Brass

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 Brass Plain Thumb Screw

BR7632-00

N/A Brass

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 Brass Plain Thumb Screw

BR7633-00

N/A Brass

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 Brass Plain Thumb Screw

BR7634-00

N/A Brass

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 Brass Plain Thumb Screw

BR7635-00

N/A Brass

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 Brass Plain Thumb Screw

BR7636-00

N/A Brass

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 Brass Plain Thumb Screw

BR7637-00

N/A Brass

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 Brass Plain Thumb Screw

BR7638-00

N/A Brass

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 Brass Plain Thumb Screw

BR7639-00

N/A Brass

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 Brass Plain Thumb Screw

BR7640-00

N/A Brass

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 Brass Plain Thumb Screw

BR7641-00

N/A Brass

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 Brass Plain Thumb Screw

BR7642-00

N/A Brass

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 Brass Plain Thumb Screw

SS7620-00

N/A Stainless Steel

N/A 5/16

N/A 4-40

N/A 1/2

N/A 3/16

N/A 5/16

N/A 4-40 Male Thread x 5/16 Thread Length Stainless Steel Plain Thumb Screw

SS7621-00

N/A Stainless Steel

N/A 5/16

N/A 4-40

N/A 9/16

N/A 3/16

N/A 3/8

N/A 4-40 Male Thread x 3/8 Thread Length Stainless Steel Plain Thumb Screw