Sturdy & Durable: The strut channel nuts is electro-galvanized, which greatly enhances the corrosion resistance, which is very durable and has a long service life. Wide Applications: These spring nuts are often used on channel struts to attach fittings to channel surfaces. Standard Springs: Thread Size 3/8"-16, 0.32" Thick, Pack of 10 Sturdy & Secure: The reinforced design of the spring nut secures your accessories in the channel, providing extra security for extra security. Stable Connection:The well manufactured nuts are strong enough to keep a tight fitting butt.