Ty-Rap® Nylon 6.6 mounting head cable ties are designed for use with screws, nuts and bolts for secure fastening to surfaces. Supplied in bag of: 1000 ( 812-5592 , 812-5618 , 812-5627 , 812-5630 , 812-5668 ); 500 ( 812-5643 ); 100 ( 812-5602 , 812-5611 , 812-5633); 50 ( 812-5652 ). Weather-resistant versions of these cable ties are available (suffix X on Manufacturer Part Number) and premium cable tie TY1435 is also available ( 812-5649 ).