The customer specializing in the production of outdoor products in the United States, like climbing products, camping tents, outdoor backpacks, etc. The customer search online that known we are a manufacturer specializing in custom screws and then contacted us. The customer's purchasing manager and engineering came to our factory with samples in the next day.
The customer needs to customize a stainless steel knurled screw to be used on their plastic buckle. The screw is used outdoors, so the purchaser first requirement is corrosion resistance and high temperature resistance. For the material, between stainless steel 304 and stainless steel 316, the purchaser wants to be stainless steel 316. Because the material stainless steel 316 is greatly improved in corrosion resistance and high temperature strength due to the addition of Mo element. The high temperature resistance can reach 1200-1300 degrees, and it can be used under harsh conditions.
The customers see our knurled screws in our sample showroom, we offer stainless steel straight knurled screw, stainless steel pineapple knurled screw and checkered knurled screw. After compared, the customer choose fine straight knurled with chamfer in the head, the chamfer is in order to the screw head is not sharp, avoiding scratches.
For the purpose of not to damage the surface of the plastic buckle when installing the screw, we recommend the customer to add a plastic washer, in this way, when screwing the screw, the washer becoming a protective screen that blocks direct contact between the screw head and the plastic buckle.
After discussion, we confirmed the drawings with the customer on the same day. And completed the sample in one week for customer confirmation.