Do you provide custom sizes and bulk supply for hex socket cap plastic screws?

Yes. As a professional manufacturer and supplier, Link Upon provides precision manufacturing for hex socket cap screws in high-performance engineering plastics such as PEEK, PPS, and PVDF. We support B2B bulk orders and custom specification consultation for global industrial customers.

How do I select the right engineering plastic fastener material for an industrial environment?

We recommend materials based on long-term operating temperature and chemical media. For semiconductor wet processes, PVDF/PTFE/PFA can be evaluated by chemical compatibility; for high-temperature or higher-load applications, PEEK, PPS+GF, and PEEK+GF can be considered. Our experienced team can help evaluate the best option for your application.

Hex Socket Cap Screw

ANSI, JIS, DIN, ISO. A complete range of plastic screws, bolts, nuts, sizes from M1.4 to M16. Complete styles of screw heads are available for various equipment design requirements.

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Hex Socket Cap Plastic Screw | Material Selection Guide

Selecting the right engineering plastic based on operating temperature, chemical media, and equipment conditions can significantly improve the service life and reliability of hex socket cap plastic screws.

As a professional manufacturer and supplier of engineering plastic screws and fasteners, Link Upon provides high-performance plastic screws and custom parts to ensure stable fastening and long-term durability in harsh industrial environments.

High-Temperature Fasteners Chemical / Acid-Alkali Resistant Semiconductor & Precision Equipment Manufacturer / Supplier

Advantages & Typical Applications

Hex socket cap plastic screws are used where compact head design and tool-driven fastening are required, and where corrosion resistance or insulation is important. Compared with metal screws, engineering plastic screws can provide:

Corrosion resistance, acid/alkali resistance, and chemical resistance
(for chemical equipment and wet process systems).
Electrical insulation and low thermal conductivity
(for electrical modules, control boxes, and sensor mounting).
Lightweight and metal-ion control
(for semiconductors, precision tools, and special processes).
Self-lubrication, low wear, or low-particle requirements
(select materials such as TPI, PTFE, PFA as needed).

By selecting the right engineering plastic, you can match the best solution based on operating temperature, chemical environment, mechanical load, and cleanliness requirements.

Common Selection Scenarios

High-Temperature Plastic Screws

For long-term exposure to approximately 150–260°C or thermal cycling, consider high-temperature engineering plastics such as PEEK, PEEK+GF, PPS, PPS+GF, self-lubricating TPI, PTFE, and PFA.

Chemical Resistance & Semiconductor Wet Processes

For acids/alkalis, oxidizers, organic solvents, or semiconductor wet chemicals, consider PVDF, PTFE, PFA, PCTFE, and selected grades of PEEK / PPS to balance chemical resistance and structural strength.

Self-Lubrication, Low Friction & Lightweight

When you need to reduce wear, minimize particles, or avoid additional lubrication, self-lubricating TPI, PTFE, and selected engineering plastics can provide low-friction performance along with lightweight benefits.

※ The “long-term service temperature” values below are general references. Final selection should consider part geometry, load, chemical media, and operating conditions.

Engineering Plastics Material Selection Guide | Temperature & Application Overview

Material Selection: Various materials are available for selection according to different environments and temperature requirements.

PEEK ｜Long-term Use Temperature 240°C

PEEK is a semi-crystalline engineering plastic suitable for applications used in high temperature and chemical solvent processes. It is tough, rigid, creep-resistant, light-resistant, and multi-ray resistant.

Screws, nuts, and spare parts made of PEEK are widely used in semiconductor equipment, aerospace, automotive electronics and motor systems, oil/gas extraction equipment, medical equipment, and food production equipment.

PPS ｜Long-term Use Temperature 200°C

PPS is a thermoplastic special engineering plastic featuring high temperature resistance, corrosion resistance, and high mechanical strength. It also has electrical properties and dimensional stability, making it suitable for electronic/electrical parts, auto parts, and chemical machinery parts.

PVDF ｜Long-term Use Temperature 150°C

PVDF is a thermoplastic fluoropolymer with excellent chemical resistance, weather resistance, high temperature resistance, electrical insulation, lubrication, and wear resistance; suitable for acid-base solvent environments, semiconductor manufacturing processes, wet chemical processes, and chemical industry equipment parts.

PP ｜Long-term Use Temperature 90°C

PP features excellent stretch ability, chemical resistance, hydrolysis resistance, and electrical properties; suitable for various chemical environments, food production equipment, and pharmaceutical machinery parts.

PPGF ｜Long-term Use Temperature 120°C

PPGF is PP reinforced with glass fiber to increase strength. It offers excellent chemical resistance, high purity, low water absorption, good electrical insulation, and higher temperature resistance.

PPS+GF ｜Long-term Use Temperature 240°C

Glass fiber reinforced PPS improves strength and heat resistance, with no significant degradation after long-term use in high-temperature environments. It also offers corrosion resistance, high mechanical properties, electrical properties, and dimensional stability; suitable for electronic/electrical parts, auto parts, and chemical machinery parts.

RENY ｜Long-term Use Temperature 105°C

RENY is a glass fiber reinforced, high-temperature resistant nylon engineering plastic with excellent oil resistance and heat resistance, widely used in automobiles, machinery, precision mechanical parts, electrical and electronic equipment, as well as civil engineering and construction materials.

PVC ｜Long-term Use Temperature 60°C

PVC is resistant to acid and alkali, has excellent electrical insulation, high mechanical strength, and good weather resistance. It is often used in chemical solvent processes or outdoor equipment parts such as building materials, packaging, medicine, wires, and cables.

TPI (Self-Lubricating) ｜Long-term Use Temperature -269~280°C

TPI provides excellent high-temperature resistance, wear resistance, and friction performance under high pressure and high-speed scraping, low outgassing under high vacuum, extraordinary dimensional stability, and low electrical conductivity.

PTFE ｜Long-term Use Temperature -190~260°C

PTFE is a fluorine-based resin resistant to most chemicals and solvents. With excellent electrical properties, non-stick behavior, and lubricity, it is widely used in high temperature, chemical, electrical, mechanical, and aviation fields.

PCTFE (Long-term Use Temperature -200~200°C) :

PCTFE is a fluoropolymer with low/high temperature resistance, chemical resistance, low permeability, and weather resistance; widely used in semiconductor process equipment parts.

PEEK+GF ｜Long-term Use Temperature 260°C

Glass fiber reinforced PEEK improves rigidity and higher temperature resistance. It can withstand high temperature up to 260°C and is suitable for thermal performance, chemical performance, and flame resistance (V-0).

PFA ｜Long-term Use Temperature 260°C

PFA provides low/high temperature resistance (-200°C~260°C), chemical resistance, weather resistance, and excellent mechanical strength. It is widely used in pharmaceutical equipment and semiconductor wet process equipment parts.

NYLON ｜Long-term Use Temperature 70°C

Nylon plastic provides heat resistance, high hardness, wear resistance, and a low friction coefficient; suitable for parts in mechanical engineering, food technology, electronics, aviation, aerospace, and automotive industry applications.

Button Socket Head Plastic Screws - Metric Size Table

The table below lists standard metric sizes. Unit: mm (diameter × length). For special lengths, materials, head types or customized spec., please contact us.

SPEC.	Length	SPEC.	Length
1.6×3	5×5	6×8	8×16
M2.5×10	5×6	6×10	8×20
M2.5×2	5×8	6×12	8×25
4×4	5×10	6×15	8×30
4×5	5×12	6×16	8×35
4×6	5×15	6×18	8×40
4×8	5×16	6×20	8×45
4×10	5×18	6×22	8×50
4×12	5×20	6×25	8×65
4×13	5×25	6×27.5	10×15
4×15	5×27	6×30	10×20
4×18	5×30	6×35	10×25
4×20	5×35	6×40	10×30
4×21	6×4	8×10	10×40
4×25	6×5	8×15	10×50
4×30	6×6

SPEC.

Length

SPEC.

Length

1.6×3

5×5

6×8

8×16

M2.5×10

5×6

6×10

8×20

M2.5×2

5×8

6×12

8×25

4×4

5×10

6×15

8×30

4×5

5×12

6×16

8×35

4×6

5×15

6×18

8×40

4×8

5×16

6×20

8×45

4×10

5×18

6×22

8×50

4×12

5×20

6×25

8×65

4×13

5×25

6×27.5

10×15

4×15

5×27

6×30

10×20

4×18

5×30

6×35

10×25

4×20

5×35

6×40

10×30

4×21

6×4

8×10

10×40

4×25

6×5

8×15

10×50

4×30

6×6

Button Socket Head Plastic Screws - Imperial Size Table

The table below lists common inch thread sizes (UNC / UNF) and standard lengths (inch). Other thread pitches, head types, materials or customized spec. please contact us.

SPEC.	Length	SPEC.	Length
#6-32UNC	5/8"	1/4-20UNC	1/2"
1/4"	3/4"
5/16"	1"
3/8"	1-1/4"
1/2"	1-1/2"
#8-32UNC	5/8"	2"
3/4"	1/4-28UNF	3/4"
7/8"	1"
1"	1 1/2"
1-1/4"	3/8-16UNC	1"
#8-36UNF	1/2"	1 1/2"
5/8"	3/8-24UNF	1"
3/4"	1 1/2"
#10-24UNC	3/8"	5/16-18UNC	1"
1/2"	1 1/2"
5/8"	5/16-24UNF	1"
3/4"	1 1/2"
1"
#10-32UNF	3/8"
1/2"
5/8"
3/4"
1"

SPEC.

Length

SPEC.

Length

#6-32UNC

5/8"

1/4-20UNC

1/2"

1/4"

3/4"

5/16"

3/8"

1-1/4"

1/2"

1-1/2"

#8-32UNC

5/8"

3/4"

1/4-28UNF

3/4"

7/8"

1 1/2"

1-1/4"

3/8-16UNC

#8-36UNF

1/2"

1 1/2"

5/8"

3/8-24UNF

3/4"

1 1/2"

#10-24UNC

3/8"

5/16-18UNC

1/2"

1 1/2"

5/8"

5/16-24UNF

3/4"

1 1/2"

#10-32UNF

3/8"

1/2"

5/8"

3/4"