PEEK (Polyether Ether Ketone) Hex Socket Cap Screws

Product Overview of PEEK Hex Socket Cap Screws

Our PEEK hex socket cap screws are precision-molded high-performance fasteners designed for demanding industrial environments where conventional metal or standard plastic screws cannot meet thermal, chemical, and electrical requirements. Manufactured from premium PEEK (Polyether Ether Ketone), these fasteners combine exceptional mechanical strength with outstanding heat resistance and long-term dimensional stability.

PEEK hex socket cap screws are a premium fastening solution for industries requiring extreme reliability, high temperature resistance, and chemical stability. With a wide size range from M1.6 to M20, they offer flexible design integration across multiple high-end applications.

For engineers and manufacturers seeking next-generation fastening solutions, PEEK provides a powerful balance of performance, safety, and durability.

Specifications of PEEK Hex Socket Cap Screws

Nominal diameter(d)	Pitch(P)	DK		K		S		T
		Max	Min	Max	Min	Max	Min	Min
M1.4	0.3	2.74	2.46	1.4	1.26	1.36	1.32	0.6
M1.6	0.35	3.14	2.86	1.6	1.46	1.56	1.52	0.7
M2	0.4	3.98	3.62	2	1.86	1.56	1.52	1
M2.5	0.45	4.68	4.32	2.5	2.36	2.06	2.02	1.1
M3	0.5	5.68	5.32	3	2.86	2.58	2.52	1.3
M4	0.7	7.22	6.78	4	3.82	3.08	3.02	2
M5	0.8	8.72	8.28	5	4.82	4.095	4.02	2.5
M6	1	10.22	9.78	6	5.7	5.14	5.02	3
M8	1.25	13.27	12.73	8	7.64	6.14	6.02	4
M10	1.5	16.27	15.73	10	9.64	8.175	8.025	5
M12	1.75	18.27	17.73	12	11.57	10.18	10.025	6
M14	2	21.33	20.67	14	12.57	12.21	12.032	7
M16	2	24.33	23.67	16	15.57	14.21	14.032	8
M20	2.5	30.33	29.67	20	19.48	17.23	17.05	10

Key Features of PEEK Hex Socket Cap Screws

• High temperature stability up to 250°C, continuous use
• Non-metallic, completely corrosion-free
• Excellent dielectric insulation performance
• Lightweight alternative to metal screws
• High mechanical strength and creep resistance
• Suitable for cleanroom and sensitive environments

Application Industries of PEEK Hex Socket Cap Screws

PEEK hex socket cap screws are widely used in advanced engineering sectors, including:

• Semiconductor & Electronics Manufacturing
  Used in wafer processing equipment, PCB assembly systems, and precision instrumentation where metal contamination must be avoided.
• New Energy Industry
  Applied in lithium battery production equipment, photovoltaic systems, and energy storage assemblies due to excellent thermal and chemical resistance.
• Medical Equipment & Devices
  Ideal for surgical instruments, diagnostic devices, and sterilization environments where biocompatibility and repeated autoclave exposure are required.
• Aerospace & High-Tech Engineering
  Used in lightweight structural assemblies, UAV systems, and aerospace instrumentation requiring a high strength-to-weight ratio.
• Chemical & Industrial Equipment
  Performs reliably in corrosive environments such as chemical processing plants and high-temperature fluid systems.

Our Manufacturing Advantages: PEEK Engineering Polymer

PEEK is a semi-crystalline high-performance thermoplastic widely recognized as one of the most advanced engineering plastics in the industry. It offers:

• Continuous service temperature up to 250°C 
• Short-term heat resistance up to 300°C 
• Excellent resistance to chemicals, acids, and hydrocarbons
• Outstanding wear and fatigue resistance
• Superior electrical insulation properties

This makes it an ideal substitute for metal fasteners in specialized applications where weight reduction, corrosion resistance, or electrical insulation is required.

Performance Highlights in Extreme Environments

Unlike traditional nylon or metal fasteners, PEEK screws maintain structural integrity under continuous thermal stress and aggressive chemical exposure. Even in long-term service conditions approaching 250°C, they retain mechanical stability without deformation or degradation.

We also offer other types of PEEK screws, as shown in the images below

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