PA6/PA66 Nylon Washers
PA6/PA66 Nylon Washers
No rust. No shorts. Just reliable nylon washers.
Stop galvanic corrosion between your dissimilar metals.
Lightweight, insulating, chemical-resistant. Sinsun delivers them all.
Sinsun Nylon Washers | Insulating Vibration-Dampening Plastic Washers
Need nylon washers for electrical insulation, galvanic corrosion prevention, or chemical resistance? Sinsun manufactures Nylon 6/6, Nylon 6/12, and Nylon 12 washers — flat, shoulder, lock, fender, and sealing types. Custom colors and dimensions. Factory direct. Request a quote.
Get a Quick QouteSinsun Nylon Washers – Industrial PA6/PA66 Insulating Washers for Vibration Dampening & Corrosion Prevention
Premium Sinsun nylon washers are precision manufactured from high-grade PA6 and PA66 nylon. These non-conductive plastic washers deliver reliable electrical insulation, vibration damping and galvanic corrosion resistance for electronics, automotive, aerospace and light industrial B2B fastening assemblies.
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Sinsun is a professional manufacturer of non-metallic fasteners. We adopt virgin PA6/PA66 raw materials without recycled fillers to strictly produce high-purity nylon washers. Most generic nylon washers are made of mixed recycled materials, which result in unstable insulation performance, easy deformation and low temperature resistance. We optimise the material formula and one-time precision stamping moulding to ensure uniform density, flat surface and stable mechanical elasticity of every finished product.
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Nylon washers can be used to fill assembly gaps and spread out bolt fastening pressure on plastic, wood and precision electronic substrates. The high elastic cushioning property compensates for small mechanical vibration during equipment operation, reducing friction noise and assembly loosening risk. The non-conductive structure prevents current transmission and eliminates the possibility of short circuits and leakages in electrical equipment assemblies.
Nylon Washer Types – Complete Sinsun Range for Every Industrial Application
Sinsun’s complete nylon washer classification — flat washers, shoulder washers, lock washers, fender washers, sealing washers, and custom ODM components. Materials include Nylon 6/6, Nylon 6/12, and Nylon 12.
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Nylon Flat Washers
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Nylon Shoulder Washers
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Nylon Lock Washers
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Nylon Fender Washers
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Nylon Sealing Washers
| Nominal Bolt Size (M) | Recommended Inner Diameter (d₁) mm | Recommended Outer Diameter (d₂) mm | Thickness Options (mm) | Typical Application |
| M2 | 2.2 – 2.5 | 5.0 – 6.0 | 0.5, 1.0 | PCB standoffs, miniature electronics |
| M2.5 | 2.7 – 3.0 | 6.0 – 7.0 | 0.5, 1.0, 1.5 | Small electronic assemblies |
| M3 | 3.2 – 3.5 | 7.0 – 9.0 | 0.5, 1.0, 1.5, 2.0 | PCB mounting, consumer electronics |
| M4 | 4.3 – 4.5 | 9.0 – 12.0 | 0.8, 1.0, 1.5, 2.0 | Control panels, light industrial |
| M5 | 5.3 – 5.5 | 10.0 – 15.0 | 1.0, 1.5, 2.0, 2.5 | Electrical enclosures |
| M6 | 6.4 – 6.6 | 12.0 – 18.0 | 1.0, 1.5, 2.0, 2.5, 3.0 | Automotive trim, marine hardware |
| M8 | 8.4 – 8.7 | 16.0 – 24.0 | 1.5, 2.0, 2.5, 3.0, 4.0 | Machinery mounting |
| M10 | 10.5 – 11.0 | 20.0 – 30.0 | 2.0, 2.5, 3.0, 4.0 | Structural assemblies |
| M12 | 13.0 – 13.5 | 24.0 – 37.0 | 2.5, 3.0, 4.0, 5.0 | Heavy equipment |
| M16 | 17.0 – 17.5 | 30.0 – 50.0 | 3.0, 4.0, 5.0, 6.0 | Industrial machinery |
Tolerance: Inner Diameter +0.10 / -0mm; Outer Diameter ±0.15mm; Thickness ±0.10mm on standard tooling. Tight tolerances (±0.05mm) available on request.
| Screw / Bolt Size | Recommended Inner Diameter (in) | Recommended Outer Diameter (in) | Thickness Options (in) |
| #2 | 0.098 – 0.100 | 0.250 – 0.312 | 0.020, 0.032 |
| #4 | 0.125 – 0.128 | 0.312 – 0.375 | 0.020, 0.032 |
| #6 | 0.149 – 0.152 | 0.375 – 0.500 | 0.025, 0.032, 0.040 |
| #8 | 0.174 – 0.177 | 0.438 – 0.562 | 0.025, 0.032, 0.040 |
| #10 | 0.199 – 0.202 | 0.500 – 0.625 | 0.032, 0.040, 0.050 |
| 1/4″ | 0.281 – 0.285 | 0.625 – 0.750 | 0.032, 0.040, 0.050, 0.062 |
| 5/16″ | 0.343 – 0.347 | 0.688 – 0.875 | 0.040, 0.050, 0.062 |
| 3/8″ | 0.406 – 0.410 | 0.812 – 1.000 | 0.050, 0.062, 0.078 |
| 1/2″ | 0.531 – 0.535 | 1.000 – 1.250 | 0.062, 0.078, 0.094 |
| 5/8″ | 0.656 – 0.660 | 1.250 – 1.500 | 0.078, 0.094, 0.125 |
| Parameter | Nylon 6/6 (PA66) | Nylon 6 (PA6) | Nylon 6/12 (PA612) | Nylon 12 (PA12) |
| Density (g/cm³) | 1.13 – 1.15 | 1.12 – 1.14 | 1.06 – 1.08 | 1.01 – 1.03 |
| Tensile Strength (MPa) | 75 – 85 | 70 – 80 | 55 – 65 | 45 – 55 |
| Flexural Modulus (MPa) | 2,500 – 3,000 | 2,200 – 2,800 | 1,500 – 2,000 | 1,200 – 1,600 |
| Hardness (Shore D) | 75 – 85 | 70 – 80 | 65 – 75 | 60 – 70 |
| Water Absorption (24 hr) | 0.8 – 1.5% | 1.0 – 1.8% | 0.2 – 0.5% | 0.2 – 0.4% |
| Water Absorption (Saturation) | 7 – 9% | 9 – 11% | 2.5 – 4% | 1.5 – 2.5% |
| Melting Point (°C) | 255 – 265 | 220 – 230 | 210 – 220 | 175 – 185 |
| Continuous Service Temp (°C) | 80 – 120 | 80 – 105 | 70 – 100 | 70 – 95 |
| Heat Deflection Temp (°C @1.8MPa) | 65 – 75 | 60 – 70 | 55 – 65 | 45 – 55 |
| Dielectric Strength (kV/mm) | 15 – 20 | 15 – 20 | 14 – 18 | 14 – 18 |
| Volume Resistivity (Ω·cm) | 10¹³ – 10¹⁵ | 10¹³ – 10¹⁵ | 10¹³ – 10¹⁵ | 10¹³ – 10¹⁵ |
| Flame Rating (UL 94) | V-2 (natural), V-0 (treated) | V-2 | V-2 | HB / V-2 |
| FDA Compliance | Yes (food grades) | Yes (food grades) | Yes | Yes |
| Typical Applications | Highest strength, general industrial | Good processability, lower mold temp | Lowest moisture absorption, dimensional stability | Low moisture, chemical resistance, low-temp impact |
Nylon Washer Applications – Critical Scenarios Where Non-Metal Beats Metal
Diverse industrial application scenarios of Sinsun nylon washers, covering electronic insulation, automotive vibration reduction, furniture assembly and new energy equipment.
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Furniture and Lighting Design Engineering
Sinsun nylon washers protect the low-density substrate from damage caused by bolt pressure in wooden furniture, aluminium alloy doors and windows and interior decoration assemblies.Assembly gaps are well filled and no loose fastening occurs due to wood shrinkage and metal thermal expansion. The hidden installation improves the overall decorative appearance and the stability of structural tightness. -
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Assembly of New Energy and Intelligence Devices
For safe assembly of high-tech energy battery equipment, intelligent sensor devices, and communication facilities, choose Sinsun nylon washers. Lightweight nylon material reduces overall equipment load without compromising fastening stability.Superior insulation and anti-jamming performance prevent signal distortion and circuit failure caused by metal conduction, which meets the high-precision assembly standards of the intelligent and new energy industries. -
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Vibration Reduction for Automotive/Vehicle Interior
Sinsun nylon washers are widely used in automotive interior parts, instrument panels and door panel assemblies. The elastic nylon construction absorbs vehicle driving vibrations and the engine.In addition to reducing noise, these washers also improve the comfort of the vehicle's interior. They also prevent contact corrosion between different metal parts inside the car, and therefore extend automotive fastening structures' service life. -
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Assembly of Electronic & Electrical Equipment Insulation
In addition to preventing scratching of fragile circuit boards, a smooth surface also ensures a long service life for electrical equipment.
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Global Nylon Washer Customer Reviews – Real Feedback from Industrial Buyers
Real nylon washer reviews from buyers across Poland, South Africa, Romania, Serbia, Chile, and Nigeria. Sinsun delivers precise dimensions, proper material selection (Nylon 6/6 vs 6/12), and reliable export.
Food processing equipment – our steel washers were being destroyed by the daily washdown chemicals for weeks. Sinsun supplies flat washers in FDA-grade nylon. 6 months in, no corrosion, no degradation and the white colour makes it easy to visually check during sanitation checks.
Solar farm mounting project, Chile. Aluminium rails + stainless bolts = risk of galvanic corrosion. Sinsun shipped 15,000 nylon fender washers - large OD distributes load on the thin aluminium, black UV resistant nylon Project passed structural inspection no corrosion issues after 12 months.
We needed some good, consistent sealing washers for water connections in our tap assembly line. Sinsun nylon sealing washers sealed perfectly every time – no leaks, no rust stains, no callbacks. Dimensional tolerance spot-on, batch to batch.
Automotive trim assembly – scratched metal washers on our painted panels. Sinsun sent black nylon flat washers M5 size. Perfect fit no surface damage and the black disappears against the trim. Significantly reduce our rework rate.
Marine hardware – stainless steel bolts through aluminium hull. We replace corroded aluminium fittings every year. Sinsun recommends nylon washers between the bolt head and the aluminium. Two years later, no corrosion. The simple solution was the correct solution.
Professional fAQ for Nylon Washer Buyers
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What are the key benefits of Sinsun nylon washers versus metal washers?
They have insulation, vibration damping and anti-corrosion properties without electric conduction or rusting.
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What material are the Sony standard nylon washers made of?
We produce standard models with high purity engineering nylon PA6 and PA66 materials in virgin quality.
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What temperature can Samsung nylon washers bear?
For normal operating environments, the stable operation range is -20℃~120℃.
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Can Sinsun nylon washers be reused after dismantling?
Low-load assembled washers can be used repeatedly without obvious deformation or performance loss.
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What is the size of a nylon washer for universal bolts M6 and M8?
M6 fits 6.4*13*1.5mm; M8 fits 8.4*17*1.5mm standard specs.
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Do you offer custom coloured or custom-sized nylon washers?
Yes, we can customise size, thickness, colour and hardness for special projects' demands.
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When do we need thicker Sinsun nylon washers?
For heavy-vibration mechanical equipment and large gap assemblies, thickened models are needed.
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Resistance to chemical erosion of Sinsun nylon washers?
They are resistant to weak acid and weak alkali corrosion, suitable for most conventional industrial environments.
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Material science you can trust
— prime resins from certified mills, full traceability, no regrind -
Dimensional precision
— ±0.05mm tolerances on molded parts, tighter on machined -
Global compliance
— RoHS, REACH, FDA, UL 94 V-2/V-0 — all documented -
Design flexibility
— flat, shoulder, lock, fender, sealing, and fully custom ODM -
Factory-direct pricing
— injection molding + CNC machining in-house, no trading markups -
Responsive engineering support
— real people answer your technical questions
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