These self-locking fasteners are widely used for fastening panels and hoods. They provide an easily operated, positive acting, shake proof fastener. Several styles to choose from. All are functional for steel, aluminum, and fiberglass installations. When possible, simplify your assembly by using common length buttons to accommodate material thickness stack up, adjust the installed spring height for desired tension by using a spring adjuster tool C73-545. Conveniently packaged in quantities of 10, and it never hurts to have a spare button or two in the tool box either! Quantity discounts are available, increase quantity in cart to earn extra savings; call or email us for your special requests. Accepts C73-505-10, C73-508-10 and C73-510-10 tabs with C73-525-10 springs.