Accessories For The Metal Push Button Switch

Whether metal push button switch models-including the common 16mm metal button switch and LED-integrated led metal switch-come with mounting accessories depends on the manufacturer and product grade, but most commercial variants include basic essential parts to support immediate installation, while specialized accessories may require separate purchase.​

Standard Included Accessories: Locknuts and Flat Washers​

Nearly all off-the-shelf 16mm metal button switch and led metal switch models come with locknuts and flat washers as standard accessories. These components are critical for securing the switch to the mounting panel:​

Locknuts: Typically made of stainless steel or plated steel (to resist corrosion), they thread onto the switch's rear mounting stud and fasten the switch tightly to the panel. For 16mm switches, locknuts are usually M16-sized (matching the switch's 16mm diameter) and may feature a knurled design for easy hand-tightening, though a wrench is often recommended for a secure fit in high-vibration environments (e.g., industrial machinery).​

Flat Washers: Placed between the locknut and the panel, they distribute the locknut's pressure evenly across the panel surface-preventing damage to the panel (especially thin aluminum or plastic panels) and enhancing the switch's stability. For led metal switch models, washers also help maintain alignment of the LED ring, ensuring the indicator light remains centered and visible from the front.​

These accessories are almost always included in the switch's packaging (often in a small plastic bag alongside the switch), as they are fundamental to basic installation. Even budget-friendly metal push button switch variants rarely require users to purchase locknuts or flat washers separately.​

Waterproof Gaskets: Included for High-IP-Rated Models​

For 16mm metal button switch or led metal switch models with rugged IP65/IP67/IP68 ratings (designed for dust and moisture resistance), waterproof gaskets are typically included as standard accessories. These gaskets-usually made of nitrile rubber or silicone (materials with excellent water and chemical resistance)-fit between the switch's front bezel and the mounting panel. They create a tight seal that blocks water, dust, or debris from entering the panel through the switch's mounting hole, critical for maintaining the switch's IP rating.​

For example, a 16mm led metal switch with an IP67 rating will include a silicone gasket to ensure no water seeps behind the panel during temporary immersion. In contrast, non-rugged metal push button switch models (e.g., IP44-rated for indoor use) rarely include waterproof gaskets, as they are not needed for basic dust protection. If users need to upgrade a non-rugged switch's sealing, gaskets can be purchased separately from manufacturers or hardware suppliers (often in packs of 5–10).​

Accessories That Require Separate Purchase​

A few specialized mounting accessories are not included with standard metal push button switch models and must be bought separately:​

Anti-rotation washers: Used in applications where the switch might twist (e.g., high-vibration automotive setups), these washers have a tab that fits into a slot on the panel, preventing the switch from rotating.​

Extension studs: For thick panels (e.g., panels over 10mm thick), standard mounting studs may be too short; extension studs (available in lengths like 15mm or 20mm) can be added to ensure the locknut secures the switch.​

Terminal covers: Optional plastic or metal covers that protect exposed terminals behind the panel from accidental contact or debris-useful for safety-critical environments (e.g., medical equipment).​

Manufacturer Packaging Notes​

Most manufacturers clearly list included accessories on the product datasheet or packaging. For example, a led metal switch package might state: "Included: 1 x M16 locknut, 1 x flat washer, 1 x silicone waterproof gasket." If accessories are missing, manufacturers often offer replacement parts for free or at low cost, especially for industrial-grade 16mm metal button switch models.​

Standard mounting accessories (locknuts, flat washers) are included with all metal push button switch models, while waterproof gaskets are included with high-IP-rated variants. Specialized accessories (anti-rotation washers, extension studs) need separate purchase, and manufacturers specify included parts in product documentatio