Self Drilling Screws: A Complete Guide to Heads, Drives, Washers, Coatings and Specifications
The best self drilling screw for an OEM application is not necessarily the cheapest screw or the most common screw. It is the screw whose head, drive, drill point, thread, material, washer and coating have been correctly matched to the customer's application and specification. For importers, distributors and brand owners, working directly with an experienced OEM manufacturer can simplify this process and create a more consistent supply chain.
JLHY manufactures OEM and custom self drilling screws for B2B customers who require specific combinations of screw head, drive, washer, plating and coating. Our product range can be configured around common requirements including pan head, Wafer head, countersunk/CSK head, hex washer head, hex washer flange head, Phillips, Pozi, square drive, PVC washers, rubber washers, EPDM washers, bonded washers, zinc plating, yellow zinc, black zinc, black phosphate, grey phosphate, Ruspert, Dacromet/Dacrotized-type coatings, Xylan and other customer-specified finishes.
Self Drilling Screw Washers: PVC, Rubber, EPDM and Bonded Washers
For many exterior and roofing applications, the washer is as important as the screw itself. A washer can provide additional bearing area and, depending on the material and design, can contribute to sealing around the fastener.
JLHY can supply self drilling screws with different washer configurations according to application requirements.
| Washer Type | Material | Main Characteristics | Typical Applications | Key Buyer Specifications |
|---|---|---|---|---|
| No Washer | — | Screw supplied without a sealing washer; suitable where sealing is not required | General metal-to-metal fastening, machinery, sheet metal, industrial assemblies | Screw size, head type, drive, coating, drill point |
| PVC Washer | PVC | Lightweight polymer washer; can provide additional bearing area and basic sealing functionality | General construction, sheet metal, roofing and enclosure applications | PVC grade, OD, ID, thickness, hardness, color, temperature requirement |
| Rubber Washer | Rubber / specified elastomer | Flexible sealing and cushioning properties; suitable where an elastomeric interface is required | General construction, roofing, sheet metal and outdoor applications | Rubber type, hardness, OD, ID, thickness, temperature and environmental resistance |
| EPDM Washer | EPDM rubber | Good weathering and environmental resistance; commonly selected for exterior sealing applications | Metal roofing, wall cladding, outdoor construction, HVAC and building products | EPDM grade, hardness, OD, ID, thickness, temperature and weathering requirements |
| Bonded Washer | Metal washer + elastomer sealing element | Combines a metal washer with an elastomeric sealing ring; provides a controlled sealing interface | Roofing, cladding, construction, industrial equipment, pipe and enclosure applications | Metal washer material, elastomer material, OD, ID, thickness, hardness and sealing requirements |
If you are developing a new self drilling screw product, replacing an existing supplier or sourcing private-label SDS screws from China, send JLHY your drawing, sample or purchasing specification for an OEM quotation.