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PPS/SH ｜ PPS Super-Low Head Hexalobular Socket Screw for Critically Space-Constrained Applications
🌟 Key Takeaways
- PPS/SH is a super-low head hexalobular (Torx) socket screw
- Manufactured from Polyphenylene Sulfide (PPS), supporting continuous operating temperatures up to 200°C (392°F)
- Complies with UL94 V-0 flame-retardant standard
- Designed for applications with strict head-height limitations, offering better torque control than Phillips drives
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In high-density electronic devices, automotive modules, and assemblies with moving components close to fastening points, screw head height often becomes a non-negotiable design constraint.
Even low-head screws may still exceed allowable clearance.
PPS/SH was developed specifically for applications requiring the lowest possible screw head height, while maintaining reliable torque control and fastening stability.
Reducing head height typically increases the risk of tool slippage and inconsistent tightening.
PPS/SH addresses this challenge with a hexalobular (Torx-type) drive, which increases the contact area between the driver and the screw head, enabling stable torque transmission even in an extremely thin head profile.
PPS/SH is a super-low head hexalobular socket screw designed for Torx drivers.
The screw head features an ultra-low profile, minimizing protrusion above the surface to the greatest extent possible.
The PPS material provides high mechanical strength, low moisture absorption, and excellent dimensional stability at elevated temperatures, making PPS/SH suitable for continuous operation in demanding engineering environments.
🔷 Thread Pitch (Metric Coarse)
PPS/SH uses standard metric coarse threads for compatibility with common fastening systems:
- M3 = 0.50 mm
- M4 = 0.70 mm
- M5 = 0.80 mm
- M6 = 1.00 mm
🔷 Head Dimensions (Super-Low Head : D × H)
The head dimensions of PPS/SH are designed to be lower than both PPS/LC and PPS/LH:
- M3: 6.0 × 1.3 mm
- M4: 8.0 × 1.5 mm
- M5: 9.0 × 1.5 mm
- M6: 10.0 × 1.5 mm
The extremely low H value allows the screw head to remain almost flush with the surface, making PPS/SH suitable for critical-clearance applications.
🔷 Driver Size (Hexalobular)
To support torque transmission in an ultra-thin head, PPS/SH uses the following driver sizes:
- M3: Size 8
- M4: Size 10
- M5: Size 15
- M6: Size 20
Selecting the correct driver size reduces head wear and minimizes the risk of deformation.
🔷 Engineering Advantages of PPS/SH
- Super-low head design for extremely space-restricted applications
- Hexalobular drive reduces cam-out even with very thin heads
- Continuous heat resistance up to 200°C (392°F)
- UL94 V-0 flame-retardant rating for enhanced fire safety
- Electrically insulating and non-magnetic
- Resistant to corrosion and chemical exposure
🔷 Typical Applications
PPS/SH is suitable for high-density electronic modules, components near moving mechanisms, automotive applications, parts close to heat sources, and ultra-low-profile non-metal fastening systems where installation space is critically limited.
📘 Summary
PPS/SH is a super-low head hexalobular socket screw designed for technical applications requiring the lowest possible head height, high heat resistance, and precise torque control.
It is ideal for advanced designs where installation space cannot be compromised, while fastening stability and safety remain essential.
❓ FAQ
Q1: What is the difference between PPS/SH and PPS/LH?
A1: PPS/SH has a significantly lower head height and is intended for critical-clearance applications, while PPS/LH supports higher torque with a slightly taller head.
Q2: Can PPS/SH be tightened to the same torque as standard heads?
A2: No. Due to its ultra-thin head design, PPS/SH should be used within the torque limits specified in technical documentation.
📚 Glossary (Key Terms)
- PPS (Polyphenylene Sulfide): An engineering plastic offering high strength, heat resistance, and excellent dimensional stability
- Hexalobular (Torx): A multi-lobed drive geometry that improves torque transmission and reduces tool slippage
- Super-Low Head: An ultra-thin screw head designed for critically space-constrained applications
- 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 is based on technical documentation and manufacturing quality control processes of Nippon Chemical Screw Co., Ltd., ensuring engineering accuracy.
#PPSscrew #SuperLowHead #Hexalobular #Torx #SpaceConstrainedDesign
#EngineeringFastener #IndustrialComponents #UL94V0 #NonMetalFastener #PrecisionDesign
📆 Updated: 2026-01-07
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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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