Technology / product information

PC/SS is a headless set screw (known in Japan as “Imo-neji”) made of polycarbonate (PC) — a high-performance engineering resin.
It provides an optimal balance of heat resistance (up to 115 °C), electrical insulation, transparency, and corrosion resistance, making it ideal for compact assemblies where screw heads must remain concealed.
Typical uses include electronic devices, medical instruments, and precision mechanical equipment that demand both aesthetic clarity and functional safety.


■ Key Features
- Heat-resistant: continuous service temperature up to 115 °C
- Excellent insulation: prevents electrical conduction in sensitive circuits
- Transparent design: allows easy visual confirmation during assembly
- Lightweight structure: minimizes mechanical load in compact devices
- Corrosion-resistant: will not rust, even in humid or chemical environments
- Flame retardant: compliant with UL94 V-2 (transparent type); black/white grades equivalent
- RoHS2 compliant: free from restricted or hazardous substances
- Made in Japan: precision-molded under strict quality control


■ Sizes & Specifications
- Thread sizes (M): M3, M4, M6
- Pitch: 0.5 – 1.0 mm (depends on size)
- Length (L): 4 mm / 6 mm
- Standard color: Transparent
- Optional color: Black (Model Code: PC-BK/SS)
- Minimum Order Quantity: 1,000 pcs per size

📌 Note: Items highlighted in red in the catalog represent the standard black model (PC-BK/SS).
📥 Catalog Download: [https://prime.nc-net.com/83120/ja/catalog/request/8042]


■ Typical Applications
- ⚡ Electronic circuit boards (PCB): ideal for tight mounting spaces
- 🧪 Laboratory and analytical equipment: chemical-resistant fastening solution
- 🏥 Medical devices: non-metallic components for enhanced safety and cleanliness
- ⚙️ Precision mechanical assemblies: flush-fit design prevents interference


■ About the Manufacturer｜Nippon Chemical Screw Co., Ltd.

Nippon Chemical Screw Co., Ltd. is a Japanese manufacturer specializing in precision plastic screws and resin fasteners.
With over 60 years of experience and more than 3,000 product variations, the company produces all components under a fully integrated in-house system in Japan —from mold design to injection molding— ensuring stable quality and short lead times.

> Company Highlights

- 100 % manufactured in Japan
- Wide material line-up: PC, PEEK, PTFE, PPS, and others
- In-house production control: mold → molding → inspection
- Global supply network covering Asia, Europe, and North America


For more information, please contact us below or download the product catalog.


Updated: 2025-10-07


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