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When selecting and installing certified electrical equipment and components in potentially Explosive Atmospheres, it is the users responsibility to ensure that the local industry codes of practice are observed and followed, for example EN 60079-14, IEC 60079-14 or NFPA 70 / NEC 500.

To determine ordering reference please select from the tables below in the following order:
Product Type - Form of Protection - Option (if required) - Thread Form - Thread Size - Thread From (if applicable) - Thread Size (if applicable) - Material
Product Type Form of Protection Options Male Thread Form Male Thread Size Female Thread Form Female Thread Size Material
From Product Page From Table A Below From Table B Below From Table C Below From Table D Below From Table C Below From Table D Below From Table E Below
737 E R M 2 M 2 5

TABLE A

Code Form of Protection
D Group II Dual Certified Ex d & Ex e
E Group II Increased Safety Ex e
G General Purpose/Industrial
M Group I Mining (Ex d)

TABLE B

Code Options
A Type A (eg. externally secured - non tamper-proof Ex d Stopper Plug)
B Type B (eg. internally secured - tamper-proof Ex d Stopper Plug)
R Optional equipment interface 'O' ring seal

TABLE C

Code Thread Form
M Metric
N NPSM
T NPT
P PG
B BSPP
I E.T. (Imperial)
S BSPT

TABLE D

Code Thread Size
Metric
"M"
NPSM
"N"
NPT
"T"
PG
"P"
BSP
"B"
Imperial
"I"
BSP
"S"
1A - - - 7 - - -
1 16 1/2" 1/2" 9 1/2" 5/8" 1/2"
2 20 3/4" 3/4" 11 3/4" 3/4" 3/4"
3 25 1" 1" 13.5 1" 1" 1"
4 32 1 1/4" 1 1/4" 16 1 1/4" 1 1/4" 1 1/4"
5 40 1 1/2" 1 1/2" 21 1 1/2" 1 1/2" 1 1/2"
6 50 2" 2" 29 2" 2" 2"
7 63 2 1/2" 2 1/2" 36 2 1/2" 2 1/2" 2 1/2"
8 75 3" 3" 42 3" 3" 3"
9 90 3 1/2" 3 1/2" 48 3 1/2" 3 1/2" 3 1/2"
10 100 4" 4" - 4" 4" 4"

Note: Other thread sizes available on request

Nominal dimensions shown in this table may vary due to material availability. All dimensions shown are in millimetres unless otherwise stated. Within the parameters of its Explosive Atmosphere certification, CMP Products reserves the right to change the design and/or dimensions of any of the products illustrated without notice. For further information, please contact CMP Products.

TABLE E

Code Material
* Brass
1 Aluminium
2 Nylon
3 Mild Steel
4 Stainless Steel 316
5 Nickel Plated Brass