Sealing Screws
Hex Socket Cap Head Sealing Screws IP67 Waterproof Allen Fasteners For New Energy Enclosures
Cap head sealing screws are high-performance integrated waterproof fasteners combining hex socket cap screw structure with fixed sealing O-ring under the head. The precision under-head groove locks the elastomer ring firmly to avoid falling off during automatic assembly and transportation. After torque tightening, the compressed O-ring forms a full-circle barrier against water dust salt fog and oil mist, steadily reaching IP67 protection grade without extra sealant or loose washers. The thick cylindrical cap delivers excellent high torque bearing capacity, ideal for heavy-duty sealed equipment assembly in new energy electric power and outdoor monitoring industries.
Core Structural Advantages
The deep internal hex socket ensures even torque transmission and resists slot cracking after repeated disassembly for routine maintenance. Compared with pan head sealing screws, the cap head has a larger stress area to prevent indentation deformation on metal and plastic housings under high locking force. The one-piece captive sealing structure eliminates common leakage risks caused by manual gasket misplacement in mass production lines, effectively lowering assembly labor cost and after-sales maintenance expense for manufacturers.
Custom Parameter Reference Table (Peer-Style Layout)
| Custom Item | Available Options | Buyer Should Confirm |
|---|---|---|
| Screw Size & Thread | Thread size, screw length, thread pitch, metric or inch thread | Drawing, sample, assembly space, tolerance requirement |
| Head & Drive Type | Cap head, hex socket drive, customized special drive | Installation method, tool type, torque requirement |
| Screw Material & Finish | Stainless steel, carbon steel, alloy steel, brass, zinc plating, nickel plating, black oxide, passivation | Mechanical strength, corrosion resistance, surface appearance, working environment |
| O-Ring Specification | O-ring size, thickness, hardness, color, NBR, silicone, EPDM, FKM | Sealing surface, compression fit, exposure to water oil heat or outdoor weather |
| Sealing Requirement | Moisture protection, dust protection, oil resistance, long-term outdoor sealing | Application environment, leakage risk grade, on-site assembly condition |
| Packaging & Supply | Bulk packing, small poly bags, product labels, export cartons, barcode marking, OEM customized packaging | Sales channel, warehouse handling mode, retail resale or bulk wholesale demand |
Material Matching Guide
Galvanized carbon steel versions provide cost-effective solutions for indoor electrical control cabinets. SUS304 stainless steel sealing screws fit general humid workshops and ordinary outdoor scenarios, while SUS316 stainless steel models offer outstanding salt spray resistance for coastal new energy facilities. EPDM O-rings suit conventional outdoor conditions, silicone O-rings adapt to low-temperature equipment, and FKM fluorine rubber O-rings maintain stable performance in oily and chemically corrosive environments. All raw materials comply with RoHS and REACH standards to meet global factory audit requirements.
Main Application Scenarios
These cap head sealing screws are widely applied in new energy charging pile shells, energy storage control boxes, outdoor communication junction boxes, industrial sensor housings, automation equipment cabinets and roadside monitoring enclosures. Metric specifications M2-M12 are kept in regular stock to support quick bulk delivery for mass production orders.
Factory Strength & Inquiry Guidance
YH fastener has three decades of professional customized fastener manufacturing experience, operating full-automatic cold forging thread rolling and optical sorting production lines. We support full-range customization according to the table above, and all finished products pass dimensional inspection salt spray test and sealing performance test before shipment. Purchasers may send your 2D/3D drawings, size lists and working condition details to get tailored sealing fastener solutions and factory-direct quotations, free samples are available for performance testing.
