The Lyn-Tron Round Thumb Nut by OneMonroe is proudly manufactured in the USA, offering reliable performance and precision craftsmanship. Designed for easy hand tightening, this round thumb nut provides a smooth, ergonomic grip that’s ideal for applications requiring frequent adjustments without tools.

Made from high-quality materials and engineered to meet exacting standards, Lyn-Tron thumb nuts are trusted across industries including electronics, aerospace, and industrial equipment. Whether used in assemblies, control panels, or custom enclosures, our round thumb nuts ensure secure fastening with a polished, professional finish.

Choose American-made quality with the Lyn-Tron Round Thumb Nut—engineered for durability, performance, and ease of use.

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Head Diameter

Female Thread

Item #

Material

OD

Head Diameter

Washer Dia

Female Thread

OAL

N/A Brass N/A 1/4 N/A 1/4 N/A 3/16 N/A 2-56 N/A 1/4
N/A Brass N/A 5/16 N/A 5/16 N/A 1/4 N/A 4-40 N/A 1/4
N/A Brass N/A 3/8 N/A 3/8 N/A 11/32 N/A 6-32 N/A 9/32
N/A Brass N/A 7/16 N/A 7/16 N/A 3/8 N/A 8-32 N/A 9/32
N/A Brass N/A 1/2 N/A 1/2 N/A 13/32 N/A 10-24 N/A 11/32
N/A Brass N/A 1/2 N/A 1/2 N/A 13/32 N/A 10-32 N/A 11/32
N/A Brass N/A 9/16 N/A 9/16 N/A 15/32 N/A 1/4-20 N/A 3/8
N/A Brass N/A 5/8 N/A 5/8 N/A 17/32 N/A 5/16-18 N/A 13/32
N/A Brass N/A 3/4 N/A 3/4 N/A 5/8 N/A 3/8-16 N/A 15/32
N/A Stainless Steel N/A 1/4 N/A 1/4 N/A 3/16 N/A 2-56 N/A 1/4
N/A Stainless Steel N/A 5/16 N/A 5/16 N/A 1/4 N/A 4-40 N/A 1/4
N/A Stainless Steel N/A 3/8 N/A 3/8 N/A 11/32 N/A 6-32 N/A 9/32
N/A Stainless Steel N/A 7/16 N/A 7/16 N/A 3/8 N/A 8-32 N/A 9/32
N/A Stainless Steel N/A 1/2 N/A 1/2 N/A 13/32 N/A 10-24 N/A 11/32
N/A Stainless Steel N/A 1/2 N/A 1/2 N/A 13/32 N/A 10-32 N/A 11/32
N/A Stainless Steel N/A 9/16 N/A 9/16 N/A 15/32 N/A 1/4-20 N/A 3/8
N/A Stainless Steel N/A 5/8 N/A 5/8 N/A 17/32 N/A 5/16-18 N/A 13/32
N/A Stainless Steel N/A 3/4 N/A 3/4 N/A 5/8 N/A 3/8-16 N/A 15/32
N/A Steel N/A 1/4 N/A 1/4 N/A 3/16 N/A 2-56 N/A 1/4
N/A Steel N/A 5/16 N/A 5/16 N/A 1/4 N/A 4-40 N/A 1/4
N/A Steel N/A 3/8 N/A 3/8 N/A 11/32 N/A 6-32 N/A 9/32
N/A Steel N/A 7/16 N/A 7/16 N/A 3/8 N/A 8-32 N/A 9/32
N/A Steel N/A 1/2 N/A 1/2 N/A 13/32 N/A 10-24 N/A 11/32
N/A Steel N/A 1/2 N/A 1/2 N/A 13/32 N/A 10-32 N/A 11/32
N/A Steel N/A 9/16 N/A 9/16 N/A 15/32 N/A 1/4-20 N/A 3/8
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