Espresso Machine Group Head Shower Screen in 304 Stainless Steel (AISI 304 (1.4301)) is used for spreading brew water evenly over the coffee puck from the espresso group head through a perforated stainless shower screen, so extraction is even across the basket. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Espresso Machine Group Head Shower Screen Available in 304 Stainless Steel
| Size | Plate diameter (mm) | Thickness (mm) | Hole diameter (mm) | Hole count | Hole rings | Fixing |
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| 51.5 flat | 51.5 | 1.6 | 0.30 | 900 | 7 | Center screw |
| 57.5 E61 | 57.5 | 1.6 | 0.30 | 1100 | 8 | Snap-in rim |
| 58.5 IMS-type | 58.5 | 0.4 | 0.20 | 2000 | 8 | Bonded to dispersion plate |
| 60 commercial | 60.0 | 1.8 | 0.30 | 1200 | 8 | Center screw |
Where 304 Stainless Steel Espresso Machine Group Head Shower Screen Is Used
- Espresso machine OEMs: factory shower screens for E61 and saturated groups.
- Café service technicians: replacement screens at routine group servicing.
- Barista upgrade brands: precision fine-hole screens for even flow.
- Home espresso enthusiasts: upgrades for single-boiler and lever machines.
Ordering Espresso Machine Group Head Shower Screen in 304 Stainless Steel
- Diameter & fixing: Center-screw or snap-in rim, matched to the group head.
- Hole size & count: Precision 0.2 mm screens with 2,000 holes spread water more evenly than 0.3 mm standard screens.
- Material: Food-grade SS304 or SS316.
Mistakes to Avoid with Espresso Machine Group Head Shower Screen
- Letting coffee oils build up until holes clog and shots channel.
- Fitting a screen of the wrong diameter or fixing type.
