M475 And M477 Flameproof Stopping Plugs (Group 1 Mining)
Application
Mining.
To close unused cable gland entries and maintain the flameproof integrity of the equipment.
Materials & Finishes
M475 and M477 stopping plugs are manufactured in Brass (standard), Nickel Plated Brass or 316 Stainless Steel.
Technical Data
Flameproof Exd & Increased Safety Exe 
I M2.
Certificate No. SIRA 06 ATEX 1240U
Suitable for use in Mines.
Construction and Test Standards: IEC/EN 60079-0, IEC/E60079-1 and IEC/EN 60079-7.
Operating Temperature Range: -60°C to +80°C.
Alternative certification options available: 
GOST R-Exe IIU
The M475 is fitted from the outside of the enclosure.
The M477 is fitted from the inside of the enclosure.
| M475 And M477 STOPPING PLUGS | ||
|---|---|---|
| Thread Size | Hexagon Key Across Flats ‘V’ |
|
| Metric x 1.5p |
NPT * |
|
| M20 | ½" | 10.0 |
| M25 | ¾" | 10.0 |
| M32 | 1" | 10.0 |
| M40 | 1¼" | 10.0 |
| M50 | 1½" | 10.0 |
| M63 | 2½" or 2" | 10.0 |
| M75 | 3" | 10.0 |
| All dimensions in millimetres (except * where dimensions are in inches) | ||
Ordering Information
Stopping Plug Type/Thread
e.g. M475/M32
