For detail shipping instructions, please check Delivery Options.
DIN933 Hexagon Head Screws
METRIC
| M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 | |
| D/Thread Dia | 1.48-1.58 | 1.89-1.98 | 2.38-2.48 | 2.87-2.98 | 3.838-3.978 | 4.826-4.976 | 5.82-5.97 | 7.79-7.96 | 9.77-9.96 | 11.76-11.95 | 15.74-15.95 |
| S/HEX Width | 3.02-3.2 | 3.82-4.0 | 4.82-5.0 | 5.32-5.5 | 6.78-7 | 7.78-8 | 9.78-10 | 12.73-13 | 16.73-17 | 18.67-19 | 23.67-24 |
| e/HEX Across min | min3.41 | min4.32 | min5.45 | min6.01 | min7.66 | min8.79 | min11.05 | min14.38 | min18.9 | min21.1 | min26.75 |
| k/Head Height | 0.98-1.22 | 1.28-1.52 | 1.58-1.82 | 1.88-2.12 | 2.68-2.92 | 3.35-3.65 | 3.85-4.15 | 5.15-5.45 | 6.22-6.56 | 7.32-7.68 | 9.82-10.18 |
| P/Pitch | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 |
| M18 | M20 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | |||
| D/Thread Dia | 17.71-17.95 | 19.71-19.95 | 23.68-26.94 | 26.68-26.94 | 29.66-29.94 | 32.66-32.94 | 35.63-35.94 | 38.625-39.0 | 41.437-41.937 | ||
| S/HEX Width | 26.67-27 | 29.67-30 | 35.38-36 | 40-41 | 45-46 | 49-50 | 53.8-55 | 58.8-60 | 63.1-65 | ||
| e/HEX Across min | min30.14 | min33.53 | min39.98 | min45.2 | min50.85 | min55.37 | min60.79 | min66.44 | min71.3 | ||
| k/Head Height | 11.28-11.72 | 12.28-2.72 | 14.78-15.22 | 16.65-17.35 | 18.28-19.12 | 20.58-21.42 | 22.08-22.92 | 24.58-26.42 | 25.58-26.42 | ||
| P/Pitch | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 |
Product Overview
The PEEK DIN 934 Hexagon Nut is a precision-machined polymer nut from unfilled PEEK resin. Conforming to DIN 934 dimensional standards, it mates with standard metric hex bolts and threaded rods. Its all-PEEK construction delivers unmatched corrosion resistance, electrical isolation, and metal-free purity — making it the fastener of choice for semiconductor chemical delivery systems, wafer cleaning equipment, vacuum chamber assemblies, and high-purity fluid handling.
Semiconductor & Cleanroom Advantages
- Complete Metal-Free Joints — Pair with PEEK DIN 933 bolts or PEEK threaded rods to create 100% metal-free bolted connections — eliminating Fe, Ni, and Cr contamination in ISO Class 1–5 cleanrooms.
- Wet Chemistry Rated — Unaffected by SC-1 (NH₄OH:H₂O₂:H₂O), SC-2 (HCl:H₂O₂:H₂O), SPM (H₂SO₄:H₂O₂), DHF, BOE, and organic solvent baths. Ideal for wet bench fixtures, megasonic tank hardware, and chemical recirculation loops.
- Electrically Isolating — Breaks galvanic corrosion paths and prevents stray current leakage. Essential for ESC power supply isolation, RF matching network enclosures, and e-chuck clamping circuits.
- Vacuum & Outgassing Compliant — ASTM E595: TML < 0.1%. Suitable for high-vacuum chamber internals, load-lock mechanisms, and transfer chamber assemblies.
- Uniform Clamping Force — PEEK’s dimensional stability under thermal cycling ensures consistent preload across bake-out and process temperature swings.
- FDA & USP Class VI Material — Suitable for pharmaceutical and food-contact equipment fastening where metallic fasteners pose contamination risks.
Application Matrix
| Domain | Use Case |
|---|---|
| Wet Process Tools | Chemical tank lid nuts, immersion heater flange fasteners, quartz bath support clamping |
| CMP Systems | Platen assembly nuts, pad conditioner arm mounting, slurry distribution ring fasteners |
| Vacuum Cluster Tools | Transfer chamber panel nuts, gate valve assembly, viewport retaining nuts |
| Gas & Chemical Delivery | VMB manifold mounting, regulator bracket nuts, gas stick assembly hardware |
| Lithography Tracks | Developer bowl fasteners, hot plate cover nuts, chemical dispense arm mounts |
| Pharma / Biotech | Bioreactor lid closures, chromatography column end fittings, CIP spray ball mounts |
| Analytical Instruments | HPLC column nuts, GC inlet fasteners, mass spectrometer ion source housing |
| FPD Manufacturing | LCD wet etch bath fasteners, OLED evaporator source mounts, substrate carrier hardware |
Key Benefits Over Stainless Steel Nuts
- No galling or seizing — self-lubricating; won’t cold-weld to PEEK or metal bolts
- 1/6 the weight — reduces moving mass in robot and wafer handling assemblies
- Zero corrosion — no pitting, crevice corrosion, or stress corrosion cracking in HCl/HF service
- Electrically transparent — ideal for RF and microwave assembly isolation
Companion Products
Complete your PEEK fastener assembly with PEEK DIN 933 Hex Bolts, PEEK DIN 125 Flat Washers, and PEEK threaded rods. See our full selection.
Ordering Information
Brand: ScrewTool | SKU: 933PEEK088 | Origin: Made in China | MOQ: Contact us
Custom PEEK formulations — carbon-filled for ESD control, glass-filled for stiffness, carbon-fiber-reinforced for wear resistance — available on request.
Shanghai Screwtool is a long-standing OEM supplier who has served US and Europe fastener industry for over 20 years.
If you have regular demands for screws or fasteners, we recommend that you can contact us directly (info@shscrewtool.com) for economic offer and complete service.
