UL (file E49405) MIL-S-23190. Standard Ty-Rap®. Self locking nylon Ty-Rap, which incorporates stainless steel locking devices in the head, thus providing a strong and positive grip at any diameter. Features and Benefits ; Manufactured from versatile nylon 6.6 ; Oval, low profile head with no sharp edges ; High strength stainless steel locking device ; Infinite number of locking positions ; Easy grip for installation ; Flammability rating UL94V-2