PRODUCT SELECTION TABLE：

Ordering Reference (781D)	Ordering Reference (781E)	Thread Size	Minimum Thread Length	Protrusion Length 'F'	Across Flats Dimension	Across Corners Dimensions	Max Installation Torque (Nm)
781DM2	781EM2	M20 x 1.5	15.0	12.7	30.0	33.0	7
781DM3	781EM3	M25 x 1.5	15.0	12.7	36.0	39.6	10
781DT1	781ET1	?' NPT	19.9	12.7	30.0	33.0	7
781DT2	781ET2	?' NPT	20.2	12.7	36.0	39.6	10
Dimensions displayed in millimeters unless otherwise stated

HOW TO ORDER A guide on how to order Breather Plug & Drain Plugs from CMP: e.g. 781 – D – M – 3 = Ex d – M25 e.g. 781 – E – M – 3 = Ex e – M25 Other Thread Variations are available on request. For further information on ordering please refer to how to order. The CMP 781E range of Increased Safety type ‘e’ breather plug / drain plugs have been tested together with CMP serrated washers to ensure that in areas that are subject to vibration, the breather plug / drain plugs do not suffer from self-loosening and in advertently fall out of the enclosure. Serrated washers are not included as standard but can be ordered separately. 

? Can be used with 737 (not Ex d direct entry applications)