Phillips Pan Head Screws with Lock Washers Zinc Plated M4-M12

Phillips Pan Head Screws with Lock Washers Zinc Plated Spring + Flat Washer Included Anti-Loosening M4-M12

Secure assemblies against vibration with pre-assembled Phillips pan head screws. Includes spring & flat washer. Zinc plated steel, DIN 7985. For machinery, automotive & electronics. Custom sizes available.

Combat vibration loosening and ensure reliable, long-lasting connections with our **Phillips Pan Head Machine Screws with Pre-Assembled Spring and Flat Washers**. This complete fastener solution combines a **standard Phillips pan head screw (DIN 7985)**, a **flat washer** for load distribution, and a **spring (split) lock washer** for vibration resistance – all pre-assembled for your convenience. Manufactured from durable carbon steel with zinc plating, they are ready for immediate use in **machinery, automotive components, electrical panels, and general industrial assembly** where vibration or thermal cycling is a concern.

Primary Uses & Applications:

* Machinery assembly (motors, pumps, gearboxes, frames).
* Automotive components (brackets, engine bay accessories, trim).
* Electrical enclosures & control panels.
* Industrial equipment & conveyors.
* Appliance manufacturing (motors, compressors).
* HVAC systems & fans.
* General fabrication where vibration or thermal cycling occurs.

Surface Treatment/Finishes:
* **Zinc Plating (Yellow Chromate - Zn+Y):** Standard finish offering good corrosion resistance for indoor/industrial environments. Yellow aids identification. RoHS compliant. Applied to both screw and washers.
* **Alternative Platings:** Clear Zinc, White Zinc, Black Zinc, or Black Oxide available upon request.

How to Use:

1. **Prepare:** Ensure female threads (nut or tapped hole) are clean, undamaged, and compatible. The pre-assembled washers eliminate the need for separate washers.
2. **Align:** Position components. The screw passes through the clearance hole in the top component.
3. **Insert:** The flat washer contacts the bearing surface; the spring washer sits between the flat washer and the screw head.
4. **Drive:** Use the **correct size Phillips screwdriver/bit** (e.g., PH2 for M5/M6). Drive clockwise.
5. **Tighten:** Tighten firmly until the spring washer is moderately compressed (flattened). This provides the locking action. **Do not over-compress** the spring washer, as this reduces its effectiveness.
6. **Function:** The **flat washer** distributes load and protects soft surfaces. The **spring washer** applies constant tension, resisting loosening from vibration or thermal changes.

Dongguan Guanbiao Hardware Products Co., Ltd., established in 2013, is a screw hardware processing factory integrating R & D, production and sales, focusing on electronic and electrical appliances, computer radiator, communication equipment, lighting, motor, motor, medical equipment, sports equipment, auto parts, baby stroller accessories and other industries. Its main products include all kinds of iron, stainless steel, copper, aluminum and alloy Precision small screws, spring screws, loose screws, stainless steel screws, step screws, plum blossom screws, slender screws, anti-theft screws, non-standard customized screws, stainless steel rivets, shafts, pins, CNC parts and stamping parts. The first mock exam the second mock exam is two punch, two die four punch, three die six punch, four die four punch, six die six punch, die closing machine, part forming machine, automatic lathe, CNC lathe and so on, and the diameter is 1mm-20mm, the length is 1mm-300mm.

The company introduced imported automation equipment, combined with mature technology and precision equipment, to ensure product quality, control quality from the source, and adhere to technological innovation.

Our business philosophy is "integrity, innovation, efficiency, win-win", your satisfaction is our eternal pursuit, looking forward to become your sincere partner!    wechat:+8613423026460