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Products - Washer Index - Wedge Lock Washer
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VPF Wedge Lock washer material / type guide
| Application parameter | Steel washers | Stainless steel (ss) washers | SMO254 washers | INCONEL®/ HASTELLOY® C-276 washers | INCONEL® 718 washers |
|---|---|---|---|---|---|
| Steel type | EN 1.7182 or equivalent | EN 1.4404 or equivalent | EN 1.4547 or equivalent | EN 2.4819 or equivalent | EN 2.4667 or equivalent |
| Examples of applications | General steel applications | General stainless steel applications. Non chlorine / acid environments | General salt water applications, pumps, chloride applications, heat exchangers, nuclear, desalination, food processing & medical equipment | General acidic environments, process and chemical industry, evaporators, offshore downhole tooling | Applications with high temperatures, gas turbines, turbo charges, incinerators |
| Available for bolt sizes | M3-M130 (see page 8 for dimensions) | M3-M80 (see page 10 for dimensions) | M3-M39 (see page 11 for dimensions) | M3-M39 available upon request | M3-M39 available upon request |
| Washer types | Regular outer diameter (NL3–NL130) Enlarged outer diameter (NL3,5sp–NL36sp) | Regular outer diameter (NL3ss–NL80ss) Enlarged outer diameter (NL3,5spss–NL30spss) | Regular outer diameter (NL3ss-254–NL39ss-254) Enlarged outer diameter (NL3,5spss-254– NL27spss-254) | Regular outer diameter (NL3ss-276–NL39ss-276) Enlarged outer diameter (NL3,5spss-276– NL27spss-276) | Regular outer diameter (NL3ss-718–NL39ss-718) Enlarged outer diameter (NL3,5spss-718– NL27spss-718) |
| Treatment Surface coating | Through hardened Delta Protekt® base coat (KL100) and top coat (VH302GZ) | Surface hardened | Surface hardened | Surface hardened | Surface hardened |
| Washer hardness* | = 465 HV1 | = 520HV0,05 | = 600HV0,05 | = 520HV0,05 | = 620HV0,05 |
| Corrosion resistance | Minimum 600 hours in salt spray test (according to IS09227) | PREN 27** | PREN 45** | PREN 68** | PREN 29** |
| Bolt grades | Up to 12.9 | Up to A4-80 | Up to A4-80 | Up to A4-80 | Up to A4-80 |
| Temperature range*** | -20°C to 200°C | -160°C to 500°C | -160°C to 500°C | -160°C to 500°C | -160°C to 700°C |
* In order to assure the unique mechanical locking function of the Wedge Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Wedge Lock washers (see table above).
** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.
*** Temperature recommendations based on information from the raw material supplier. Locking function not affected within the specification.