| PANEL DIMENSIONS | PART NO. | DESCRIPTION | PART DIMENSIONS | CAD | 
| Maximum
Thickness | D
Mounting Hole
Diameter | C
To Prevent
Rotation | Black | A
Head
Diameter | B
Overall
Height | 
| in. | mm. | in. | mm. | in. | mm. | in. | mm. | in. | mm. | 
| 
 For Double D Mounting Hole Strain Reliefs | 
| .125 | 3,2 | .375 | 9,5 | .345 | 8,8 | 2617 | DP 375* | .468 | 11,9 | .406 | 10,3 |  | 
| .437 | 11,1 | .390 | 9,9 | 2488 | DD 437-390 | .531 | 13,5 |  | 
| .500 | 12,7 | .445 | 11,3 | 2491 | DD 500-445 | .554 | 14,7 |  | 
| .125 | 3,2 | .562 | 14,3 | .530 | 13,5 | 2494 | DD 562-530 | .656 | 16,7 | .406 | 10,3 |  | 
| .625 | 15,9 | .550 | 14,0 | 2497 | DD 625-550 | .728 | 18,5 |  | 
| .750 | 19,1 | .625 | 15,9 | 2503 | DD 750-625 | .921 | 23,4 |  | 
| .125 | 3,2 | .875 | 22,2 | .770 | 19,5 | 2509 | DD 875-770 | 1.016 | 25,8 | .453 | 11,5 |  | 
| 1.109 | 28,2 | 1.000 | 25,4 | 2717 | DD 1109-1000 | 1.218 | 30,9 |  | 
| .125 | 3,2 | 2.000 | 50,8 | 1.875 | 47,6 | 2959 | DD 2000-1875 | 2.170 | 55,1 | .478 | 12,1 |  | 
| For Lockit ST-Series, Rectangular Mounting Hole Strain Reliefs** | 
| .099 | 2,5 | .512 | 13,0 | .453 | 11,5 | 1890† | RP 115-130 | .580 | 14,7 | .403 | 10,2 |  | 
| .157 | 4,0 | .690 | 17,5 | .690 | 17,5 | 1892 | RP 175-175 | .830 | 21,1 | .470 | 11,9 |  | 
Standard color black. Consult Heyco for white and other colors.
*On installation, DP 375 Locking Fingers must be aligned with Mounting Hole Flats.
**Rectangular Plugs locking finger steps match those of the corresponding ST Lockit Strain Reliefs.
†PN 1890 is not CSA certified.