Hebei Kappa Metal Products Co., Ltd. is one of the most reliable manufacturers and suppliers of china source factory sems combination screws, pre-assembled flat washer & spring washer. carbon steel color zinc / stainless steel available, m3-m8. in China. Welcome to buy bulk high quality china source factory sems combination screws, pre-assembled flat washer & spring washer. carbon steel color zinc / stainless steel available, m3-m8. made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Core Advantages
Our Phillips hex head SEMS combination screws come fully pre-assembled with flat washer and spring washer in one single part. No separate picking or manual gasket installation required on your assembly line. Available in color zinc plated carbon steel or 304 stainless steel. Conforms to GB9074.17 standard, sizes M3, M4, M5, M6, M8. We are a China source factory with 40 years of fastener production experience and ISO9001 certification. Stable batch quality and full MTC material certificate support for OEM orders. additional benefits to everyone.
Cross Recessed Screw with Washer (SEMS) Specifications:
| Spec | Head Diameter dk (mm) | Washer Diameter d1 (mm) | Washer Thickness h (mm) |
|---|---|---|---|
| M4 | 6.8 | 7.8 | 0.68 |
| M5 | 7.8 | 9.8 | 0.8 |
| M6 | 9.8 | 11.8 | 1 |
| M8 | 13.8 | 15.8 | 1.5 |
Application Scenarios
- Electrical cabinets & distribution boxes
- HVAC, air-conditioning equipment
- Industrial automation machinery & housings
- Metal sheet metal fabrication
- Furniture & metal frame assembly
- All-in-one Pre-Assembled Screw
Screw + flat washer + spring washer locked together before delivery. No manual sorting, no lost or forgotten washers on your production line.
- Dual-Drive Hex & Phillips Head
2-way drive design, works with both screwdriver and hex wrench. Fits manual assembly and automated fastening machines.
- Built-in Anti-Vibration Locking
Integrated spring washer retains clamping force under constant vibration. Prevents loosening for cabinets, HVAC and sheet metal enclosures.
- Certified Source Factory Quality
40-year fastener manufacturer with ISO9001. Carbon steel color zinc or 304 stainless steel. MTC certificates available per batch.
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