M3.5-1.57X25 Metric 6 Lobe Round Washer PT Alternative Fully Threaded A2 Stainless Steel (Pack Qty 2,000) BC-609373

PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc., may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape, which can vary from lot to lot. A spaced thread fastener with a dome-shaped head and an integrally-formed washer; a recess that accommodates a 6-lobed driver; and a flat bearing surface that is 90° to the screw's shank. When comparted to a thread rolling screw, the threads are wider and have a sharper angle. Furthermore, the core of the shank has a reduced diameter between each consecutive set of threads. The point opposite is the head is blunt. Designed to form its own thread in thermoplastic materials. The 30° thread angle reduces the outward expansion of the material being displaced. The recessed design of the thread root enables more material flow into the area between threads. The depth of the thread pattern increases the fastener's load carrying properties while resisting vibrations, thus resisting loosening.