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PPS/CB ｜ PPS Hexagon Socket Head Bolt for High Clamping Force and Space-Constrained Applications
🌟 Key Takeaways
- PPS/CB is a hexagon socket head cap screw manufactured from Polyphenylene Sulfide (PPS)
- Supports continuous operating temperatures up to 200°C and complies with UL94 V-0
- Recessed head design enables high torque transmission in limited installation spaces
- Electrically insulating, non-magnetic, and chemical-resistant, ideal for high-density engineering applications
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In machinery, power electronics, and high-density industrial equipment, space around fastening points is often limited.
Using external hexagon head bolts may increase required clearance and interfere with compact designs.
PPS/CB is therefore selected when a recessed screw head is required to minimize surrounding space while maintaining high clamping force and structural reliability.
Although made from engineering plastic, PPS/CB is designed to reliably transmit tightening torque through an internal hexagon socket.
This allows it to replace metal screws in applications requiring clamping strength, electrical safety, and environmental durability.
PPS/CB is a hexagon socket head screw tightened using an internal hex key.
Once assembled, the screw head sits recessed within the component, reducing snagging, improving assembly cleanliness, and minimizing interference with adjacent parts.
The PPS material provides high mechanical strength, low moisture absorption, and excellent dimensional stability at elevated temperatures, making PPS/CB suitable for continuous operation and repeated tightening in industrial environments.
🔷 Thread Pitch (Metric Coarse)
PPS/CB uses standard metric coarse threads for compatibility with common nut and fastening systems.
- M3 = 0.50 mm
- M4 = 0.70 mm
- M5 = 0.80 mm
- M6 = 1.00 mm
- M8 = 1.25 mm
- M10 = 1.50 mm
- M12 = 1.75 mm
🔷 Head Dimensions (Socket Head : D × H)
The head dimensions of PPS/CB are defined to balance torque capacity and compactness.
- M3: 5.5 × 3.0 mm
- M4: 7.0 × 4.0 mm
- M5: 8.5 × 5.0 mm
- M6: 10.0 × 6.0 mm
- M8: 13.0 × 8.0 mm
- M10: 16.0 × 10.0 mm
- M12: 18.0 × 12.0 mm
Where D represents head diameter and H represents head height, both directly related to allowable tightening torque.
🔷 Hex Socket Size (B)
Internal hexagon socket sizes for proper tool selection:
- M3 = 2.5 mm
- M4 = 3 mm
- M5 = 4 mm
- M6 = 5 mm
- M8 = 6 mm
- M10 = 8 mm
- M12 = 10 mm
Selecting the correct B size helps prevent tool slippage and extends screw head service life.
🔷 Engineering Advantages
- Recessed head design saves space around fastening points
- Higher torque transmission compared to Phillips-type screws
- Continuous heat resistance up to 200°C (392°F)
- Flame-retardant rating UL94 V-0 for enhanced fire safety
- Electrically insulating and non-magnetic
- Resistant to corrosion and chemical exposure
🔷 Typical Applications
PPS/CB is suitable for high-density machine frames, automotive modules, high-voltage electrical equipment, components near heat sources, and applications requiring flush and compact fastening for safety and cleanliness.
📘 Summary
PPS/CB is a hexagon socket head screw designed for technical applications requiring high clamping force, compact installation, and heat resistance.
It is ideal for engineering systems with space constraints where fastening stability remains critical.
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❓ FAQ
Q1: What is the difference between PPS/CB and PPS/BT?
A1: PPS/CB features a recessed socket head for space-limited applications, while PPS/BT uses an external hexagon head for open-access fastening.
Q2: Can PPS/CB replace metal screws?
A2: Yes, for applications where loads remain within specification and electrical insulation, lightweight design, and corrosion resistance are required.
📚 Glossary
- PPS (Polyphenylene Sulfide): An engineering plastic used for screw manufacturing, offering high strength and heat resistance
- Hexagon Socket Head: A screw head design using an internal hex key for torque transmission
- UL94 V-0: Flame-retardancy standard for materials (detailed specifications not provided)
📖 Reference
[1] Latest General Catalog 2024- – Nippon Chemical Screw Co., Ltd. –
🔒 Trust
All information in this article has been reviewed and validated by the Engineering Department of Nippon Chemical Screw Co., Ltd. to ensure technical accuracy.
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📆 Updated: 2026-01-06
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Measuring machinery / Industrial machinery / Medical equipment
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Plastic Screw / Resin Screw / Plastic Spring / Resin Spring / Resin Molded Product
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Nippon Chemical Screw Co., Ltd. specializes in the development and production of plastic fasteners made from high-performance resins. Our products are designed for environments that demand insulation, ...
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