Monroe
OneMonroe
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OneMonroe’s Lyn-tron brand Metric Washer Face Thumb Screws are proudly manufactured in the USA, delivering precision-engineered fastening solutions for applications that demand reliability and performance. Designed with a wide washer face, these thumb screws provide increased surface contact to prevent damage to panels, enclosures, or sensitive components during manual tightening.

Made from high-quality materials and produced under strict manufacturing standards, Lyn-tron’s metric washer face thumb screws are ideal for industries such as electronics, aerospace, instrumentation, and medical devices. The ergonomic knurled head ensures easy, tool-free installation and removal, making them perfect for assemblies that require frequent access or adjustments.

Available in a variety of metric sizes and finishes, these thumb screws combine function with durability, backed by American-made craftsmanship and OneMonroe’s commitment to quality.

washer-face-thumb-screw_large
Unit of Measure
1 2 

Item #

Material

OD

Head Diameter

Washer Dia

Male Thread

OAL

Head Length

Thread Length

Quantity
BR5440-00 N/A Brass N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3X0.5 N/A 16 mm N/A 5 mm N/A 8 mm
BR5441-00 N/A Brass N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3X0.5 N/A 17 mm N/A 5 mm N/A 9 mm
BR5442-00 N/A Brass N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3X0.5 N/A 19 mm N/A 5 mm N/A 11 mm
BR5443-00 N/A Brass N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3.5X0.6 N/A 17 mm N/A 5 mm N/A 9 mm
BR5444-00 N/A Brass N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3.5X0.6 N/A 19 mm N/A 5 mm N/A 11 mm
BR5445-00 N/A Brass N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3.5X0.6 N/A 21 mm N/A 5 mm N/A 13 mm
BR5446-00 N/A Brass N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M4X0.7 N/A 17 mm N/A 5 mm N/A 9 mm
BR5447-00 N/A Brass N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M4X0.7 N/A 21 mm N/A 5 mm N/A 13 mm
BR5448-00 N/A Brass N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M4X0.7 N/A 24 mm N/A 5 mm N/A 16 mm
BR5449-00 N/A Brass N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M5X0.8 N/A 17 mm N/A 5 mm N/A 9 mm
BR5450-00 N/A Brass N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M5X0.8 N/A 21 mm N/A 5 mm N/A 13 mm
BR5451-00 N/A Brass N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M5X0.8 N/A 24 mm N/A 5 mm N/A 16 mm
BR5452-00 N/A Brass N/A 13 mm N/A 13 mm N/A 9.5 mm N/A M6X1 N/A 18 mm N/A 6 mm N/A 9 mm
BR5453-00 N/A Brass N/A 13 mm N/A 13 mm N/A 9.5 mm N/A M6X1 N/A 22 mm N/A 6 mm N/A 13 mm
BR5454-00 N/A Brass N/A 13 mm N/A 13 mm N/A 9.5 mm N/A M6X1 N/A 25 mm N/A 6 mm N/A 16 mm
BR5455-00 N/A Brass N/A 13 mm N/A 13 mm N/A 9.5 mm N/A M6X1 N/A 28 mm N/A 6 mm N/A 19 mm
SS5440-00 N/A Stainless Steel N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3X0.5 N/A 16 mm N/A 5 mm N/A 8 mm
SS5441-00 N/A Stainless Steel N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3X0.5 N/A 17 mm N/A 5 mm N/A 9 mm
SS5442-00 N/A Stainless Steel N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3X0.5 N/A 19 mm N/A 5 mm N/A 11 mm
SS5443-00 N/A Stainless Steel N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3.5X0.6 N/A 17 mm N/A 5 mm N/A 9 mm
SS5444-00 N/A Stainless Steel N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3.5X0.6 N/A 19 mm N/A 5 mm N/A 11 mm
SS5445-00 N/A Stainless Steel N/A 10 mm N/A 10 mm N/A 9.5 mm N/A M3.5X0.6 N/A 21 mm N/A 5 mm N/A 13 mm
SS5446-00 N/A Stainless Steel N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M4X0.7 N/A 17 mm N/A 5 mm N/A 9 mm
SS5447-00 N/A Stainless Steel N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M4X0.7 N/A 21 mm N/A 5 mm N/A 13 mm
SS5448-00 N/A Stainless Steel N/A 11 mm N/A 11 mm N/A 9.5 mm N/A M4X0.7 N/A 24 mm N/A 5 mm N/A 16 mm
Unit of Measure
1 2