Product Overview:
The document describes the M-312 momentary push button switch manufactured by Kahlenberg Industries Inc., Two Rivers, Wisconsin, USA. It is a lighted push button with normally open (N.O.) single-pole single-throw (SPST) contacts.

Specifications:
- Contact Rating: 10 A maximum, with a maximum voltage of 500 Volts at 2 Amps.
- Contact Material: Plated copper contacts.
- Body Material: Plastic body and plastic ring.
- Electrical Certification: CSA certified, UL listed.
- Standards Compliance: IEC/EN 60947, VDE 0660.
- Ingress Protection: IP67 and IP69K according to IEC 60529.
- NEMA/UL/CSA Ratings: 12, 13, 3R, 4X.

Mechanical Dimensions:
- Panel Cutout Diameter: 2.00 inches (50.8 mm) with 4 places for mounting holes of 11/64 inches (4.36 mm).
- Panel Thickness: Nominal 1.66 inches (42.2 mm).
- Overall Dimensions: Width and height approximately 2.83 inches (71.9 mm) by 2.20 inches (55.9 mm).
- Depth: Approximately 1.17 inches (29.7 mm).

Electrical Connections:
- Terminal Layout: Four terminals labeled X1, X2, 3, and 4.
- Power Supply: 12-30 V DC with LED current draw of 5-14 mA.

Additional Features:
- Morse Key Number: 34 12 XX.
- The switch includes a lighted LED button.

Manufacturer Information:
- Kahlenberg Industries Inc., Two Rivers, Wisconsin 54241.
- Drawing Number: 3-6753, Revision Z.
- Date of latest update: January 25, 2024.

Summary:
This document provides detailed mechanical and electrical specifications for the M-312 lighted momentary push button switch. It highlights the switch's compliance with international standards, ingress protection ratings suitable for harsh environments, and its robust electrical ratings. The dimensional data supports panel mounting with precise cutout sizes and mounting hole locations. The product is suitable for industrial applications requiring reliable momentary switching with visual indication.