Phillips Pan Head SEMS Combination Screws With Flat and Spring Washers
Pan Head SEMS Screws – Pre-Assembled Combination Screw With Captured Washers
Pan head SEMS screw is a one-piece pre-assembled combination fastener. Flat washer and spring lock washer are firmly locked under the pan head by thread rolling processing. The washers can rotate freely on the shank but cannot fall off during transportation, storage and automatic feeding. It effectively solves the trouble of manually matching loose washers in mass production lines.
Our factory supplies metric pan head SEMS combination screw covering M1.6 to M6, standard goods in stock and non-standard customization are acceptable.
Core Advantages of Pan Head SEMS Combination Screws
Available Materials & Surface Treatments
Material Options
- Carbon steel: Cost-effective for indoor electrical cabinets, general machinery assembly
- SUS304 stainless steel: Good rust resistance for humid workshops and outdoor electronic enclosures
- SUS316 stainless steel: Excellent salt spray resistance for coastal equipment and medical instruments
Surface Finishes
Zinc plating, black oxide, nickel plating, passivation, nylon anti-loose patch coating can be customized according to working conditions.
Standard Specifications
- Head Style: Phillips pan head
- Thread Type: Metric machine thread
- Thread Size: M1.6, M2, M2.5, M3, M4, M5, M6
- Washer Configurations: Flat washer only, spring lock washer only, flat + spring double washers
Main Application Scenarios
Pan head SEMS combination screw is widely adopted in multiple manufacturing industries:
- Consumer Electronics & PCB Assembly: Surveillance housings, smart home devices, LED power supply and circuit board fixing
- Electrical Hardware: Distribution boxes, air conditioner housings, terminal block assembly
- Automation Equipment: Motor casings, control panels and mechanical auxiliary components
- New Energy Industry: Charging pile control boxes, energy storage equipment brackets
Customization Service
We support full OEM and ODM service for pan head SEMS screw. You can customize screw length, partial thread structure, thickened washers and special coatings. Special insulated washers and conductive tooth washers can also be added as required. Free samples are available for performance testing before bulk orders.
About Our Factory
We are a professional fastener manufacturer focusing on various SEMS combination screws, machine screws and self-tapping screws. Equipped with automatic thread rolling machines and optical sorting equipment, we strictly control dimensional tolerance and surface quality. All products meet RoHS standards, and we can provide material test reports and inspection documents. Large stock of regular pan head SEMS screws ensures fast delivery within 3–7 working days.
Inquiry Guide
If you are sourcing reliable pan head SEMS combination screw suppliers, please send detailed requirements including thread size, material, surface treatment, order quantity and application environment. Our engineering team will reply to you within 24 hours, offer free samples, specification sheets and competitive factory direct prices. Feel free to contact us to get customized fastening solutions.