GFRP Composite Flat Washers
| Standard | DIN 125 ref · ISO 7089 ref · OEM |
|---|---|
| Material | GFRP / PA66-GF |
| Strength Grade | — |
| Size Range | Project range |
| Surface Treatment | UV Stabilized |
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Product Description
Product Description & Key Specifications
GFRP composite flat washers are reinforced non-metallic washers used with composite bolts, GFRP nuts, anchor rods and insulating assemblies. They provide electrical isolation, corrosion resistance and outdoor durability where ordinary steel washers would conduct electricity or create corrosion concerns.
GFRP and PA66-GF materials combine polymer insulation with glass fiber reinforcement for improved stiffness compared with unfilled plastics. They are commonly selected for renewable energy equipment, electrical support structures, cable tray hardware, composite fastener sets and corrosion-prone outdoor assemblies.
These washers are usually supplied to OEM drawings or ISO 7089 / DIN 125 reference dimensions, with UV-stabilized material for outdoor exposure. Final selection should confirm washer diameter, thickness, bearing load, mating fastener material, UV exposure and any dielectric or flame-retardant requirement.
| Product type | GFRP composite flat washers / FRP insulating washers |
|---|---|
| Standards | ISO 7089 reference / DIN 125 reference / OEM drawing |
| Material | GFRP / PA66-GF |
| Strength grade | Composite material, project-specific mechanical properties |
| Size range | Project range by drawing |
| Common models | M8, M10, M12, M16, M20 and custom composite washer sizes |
| Washer form | Flat washer with drawing-based ID, OD and thickness |
| Surface finish | UV-stabilized composite surface |
| Matched hardware | GFRP composite bolts, GFRP hex nuts and insulating fastener assemblies |
| Documentation | CoC, material data sheet, dimensional report and test reports on request |
Dimensions & SpecificationsDIN 125A / ISO 7089
Technical Drawing
Dimensional Table
| Parameter | Φ1.6 | Φ1.7 | Φ2 | Φ2.3 | Φ2.5 | Φ2.6 | Φ3 | Φ3.5 | Φ4 | Φ5 | Φ6 | Φ7 | Φ8 | Φ10 | Φ12 | Φ14 | Φ16 | Φ18 | Φ20 | Φ22 | Φ24 | Φ26 | Φ27 | Φ28 | Φ30 | Φ32 | Φ33 | Φ35 | Φ36 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d/min | 1.7 | 1.8 | 2.2 | 2.5 | 2.7 | 2.8 | 3.2 | 3.7 | 4.3 | 5.3 | 6.4 | 7.4 | 8.4 | 10.5 | 13 | 15 | 17 | 19 | 21 | 23 | 25 | 27 | 28 | 29 | 31 | 33 | 34 | 36 | 37 |
| d/max | 1.84 | 1.94 | 2.34 | 2.64 | 2.84 | 2.94 | 3.38 | 3.88 | 4.48 | 5.48 | 6.62 | 7.62 | 8.62 | 10.77 | 13.27 | 15.27 | 17.27 | 19.33 | 21.33 | 23.33 | 25.33 | 27.33 | 28.33 | 29.33 | 31.39 | 33.62 | 34.62 | 36.62 | 37.62 |
| dc/max | 4 | 4.5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 12 | 14 | 16 | 20 | 24 | 28 | 30 | 34 | 37 | 39 | 44 | 50 | 50 | 50 | 56 | 60 | 60 | 66 | 66 |
| dc/min | 3.7 | 4.2 | 4.7 | 5.7 | 5.7 | 6.64 | 6.64 | 7.64 | 8.64 | 9.64 | 11.57 | 13.57 | 15.57 | 19.48 | 23.48 | 27.48 | 29.48 | 33.38 | 36.38 | 38.38 | 43.38 | 49.38 | 49.38 | 49.38 | 55.26 | 58.8 | 58.8 | 64.8 | 64.8 |
| h/max | 0.35 | 0.35 | 0.35 | 0.55 | 0.55 | 0.55 | 0.55 | 0.55 | 0.9 | 1.1 | 1.8 | 1.8 | 1.8 | 2.2 | 2.7 | 2.7 | 3.3 | 3.3 | 3.3 | 3.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 5.6 | 5.6 | 5.6 | 5.6 |
| h/min | 0.25 | 0.25 | 0.25 | 0.45 | 0.45 | 0.45 | 0.45 | 0.45 | 0.7 | 0.9 | 1.4 | 1.4 | 1.4 | 1.8 | 2.3 | 2.3 | 2.7 | 2.7 | 2.7 | 2.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 4.4 | 4.4 | 4.4 | 4.4 |
Engineering references
Technical resources
These standards are dimensional references only; confirm material, performance, tolerances and project approval separately.02
Selection
Selection Advantages by Application
Solar PV and Renewable Energy Hardware
UV-stabilized GFRP washers support non-conductive outdoor fastening in PV frames, cable trays and electrical support hardware where corrosion resistance and insulation are required.
Renewable energy fastenersElectrical Isolation and Composite Fastener Sets
Composite washers are matched with GFRP bolts and nuts for insulating assemblies that need a complete non-metallic fastener system rather than mixed metal hardware.
Power generation fastenersCorrosion-Prone Outdoor Structures
GFRP washers can reduce metallic corrosion concerns in chemical, water-treatment and exposed outdoor equipment when mechanical loads are within composite material limits.
Industrial equipment fasteners03
Assembly
Recommended Matching Products
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Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Machining, molding or cutting of GFRP / PA66-GF washer blanksComposite material verification and batch traceability
Custom ID, OD and thickness by OEM drawingDimensional inspection, burr control and edge quality review
UV-stabilized material selection for outdoor serviceVisual inspection and material data sheet review
Washer supply alone or as composite bolt-nut-washer kitsFit check with matching composite bolts and nuts when specified
Project packaging for renewable energy and electrical assembliesCoC, dimensional report and test report support on request
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FAQ
Common Questions Before RFQ
What are GFRP composite flat washers used for?
They are used in non-conductive, corrosion-resistant and lightweight assemblies, often together with composite bolts and nuts.
Are GFRP washers stronger than PA66 washers?
Glass fiber reinforcement generally improves stiffness compared with unfilled PA66, but final load capacity depends on material grade, thickness and joint design.
Can they be used outdoors?
Yes, when UV-stabilized material is specified and the outdoor exposure, temperature and mechanical load are suitable for the composite grade.
Can GFRP washers replace steel washers?
Only where the design permits composite materials. They are not direct replacements for structural steel washers in high-preload steel joints.
Can you supply complete composite fastener sets?
Yes. GFRP washers can be supplied with matching composite bolts and hex nuts when size, material and performance requirements are confirmed.
Need GFRP composite flat washers?
Send washer drawing, size, thickness, composite material, UV requirement, quantity and matching bolt/nut needs. We can quote GFRP flat washers for renewable energy, electrical isolation and corrosion-resistant assemblies.
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