25109919
Spring Nut
Mack

Spring Nut offers a captive, spring-loaded fastening option designed to improve assembly efficiency on rugged truck bodies and engine compartments. The spring element provides consistent medial tension, helping the nut stay in place during panel alignment and reducing the risk of dropped fasteners in hard-to-reach areas. This type of nut is particularly beneficial in vibration-prone environments where traditional nuts may loosen over time; the spring action maintains clamping force and alignment, contributing to a more secure enclosure for electrical panels, brackets, and other components. Made from durable steel with corrosion resistance appropriate for road salts and moisture exposure, it supports repeated assembly cycles without permanent deformation. When installing, choose the correct thread size and panel hole pattern, compress the spring as you seat the nut, then thread in the bolt and torque to specification. Source One Parts Center recommends routine inspection of captive fasteners during service to prevent slow failures and maintain robust assembly integrity.