Waterproof Flush Metal Push Button Switch

Product Overview
The DU-2211Z-B-1 is a metal push button switch manufactured by CHNANMA - non-illuminated, flat-head, designed for machine panels and control desks. This flush metal button switch features a face sitting flush with its bezel. Head and bezel are constructed from nickel-plated brass, fitted with silver-plated contacts at the rear. Without lamp or lens, this non-illuminated metal push button requires no additional indicator-wiring work.
Specifications
- Panel cutout: 12 / 16 / 19 / 22 / 25 / 30 mm
- Contact form: 1NO (2-pin) or 1NO+1NC (3-pin)
- Operation Mode: Momentary (auto-reset) / Maintained (push-on / push-off)
- Contact material: Silver-plated
- Base material: V0 flame-retardant plastic
- Body & Bezel Material: Nickel-plated brass
- Rated Current: Please contact us for the rating you need
Dimensions

The 22 mm size is widely adopted for standard panels. Hex nut and sealing O-ring are supplied as standard accessories.
Materials
- Head and bezel: nickel-plated brass, delivering good corrosion-resistance for many outdoor scenarios and high-humidity workshop environments.
- Base: V0 flame-retardant plastic.
- Contacts: silver-plated for stable switching.
- Sealing: waterproof silicone ring together with panel-mount O-ring.
Performance
This waterproof metal push button switch achieves IP65 protection: dust-tight and resistant against water jets. The panel surface can withstand splashing water, rain exposure and routine wiping. This flush metal button switch also has an IK10 mechanical impact resistance rating. The V0 flame-retardant base suits machine-panel use. Momentary and maintained models adopt the same housing design.
Key Features
- Flat flush-mount head; no protruding part to catch sleeves or tools
- Lamp-free and lens-free design; no indicator-circuit wiring required
- Two contact options: 1NO or 1NO+1NC; six panel cutout sizes ranging from 12 mm to 30 mm
- Sealing O-ring included for reliable panel-joint protection
- Nickel-plated brass body and silver-plated contacts supplied as standard

Applications
This industrial push button switch is suitable for frequent daily-use on control desks. It can be applied to industrial control panels by panel builders and assembled on automation machinery by equipment manufacturers. As a solid non-illuminated metal push button, it also fits diverse working conditions including access-control and intercom devices, water pumps and roadside cabinets, test-and-measurement instrument panels, as well as equipment cabinet-door control.
Our Advantages
CHNANMA, brand of Jiangxi Nanma Electrical Co., Ltd., was founded in 2001. With a 6,000 m² production base in Ruijin, Jiangxi and sales office in Zhejiang, we operate under ISO9001:2015, ISO14001 and ISO45001 management systems. Around 30% of our team are engineering specialists. As a professional metal push button switch manufacturer, we offer factory-direct supply, OEM & ODM customization, CE, CB, CCC, CQ and RoHS-certified products, and can provide dimension drawings for your panel-design needs. Feel free to share your application requirements for suitable product recommendations.