PG gland thread sizes

Listed below is the necessary information for drilling and tapping holes for Rose+Bopla’s PG or metric cable grips and the appropriate tap part number. Thick wall applications require that you tap holes for cable glands. Thin wall applications may be drilled through with a nut.

CROSS REFERENCE
CHART

Metric Cable Grip Size	Tap Size	Metric Tapped Hole Size	Inch Tapped Hole Size	Closest American Drill Size	Metric Through-Hole	Inch Through-Hole
M 12	M 12x1.5	10.5 mm	0.413	z(.413)	12.2mm	0.480
M 16	M 16x1.5	14.5mm	0.571	37/64"(.578)	16.2mm	0.638
M 20	M 20x1.5	18.5mm	0.728	47/64"(.734)	20.2mm	0.795
M 25	M 25x1.5	23.5mm	0.925	59/64"*(.922)	25.2mm	0.992
M 32	M 32x1.5	30.5mm	1.2	-	32.2mm	1.268
M 40	M 40x1.5	38.5mm	1.516	-	40.2mm	1.583

If you are going to use a polyamide grip with a nut and are not going to tap the hole, you will need to drill a larger hole to push the grip through. Use the chart below for the correct size hole.

DRILL HOLE
AND TAP INFORMATION

Cable Grip Size	Rose PG Tap Part Number	Metric Tapped Hole Size	Inch Tapped Hole Size	Closest American Drill Size	Metric Through-Hole	Inch Through-Hole
PG 7	08070000	11.5mm	0.453	29/64" ( .453)	12.3mm	0.484
PG 9	08090000	14mm	0.551	35/64" ( .547)	15.1mm	0.594
PG 11	08110000	17.25mm	0.679	46/63"( .672)	19.6mm	0.772
PG 13.5	08130000	19mm	0.748	3/4"( .750)	20.2mm	0.795
PG 16	08160000	21.25mm	0.837	53/64"( .828)	22.3mm	0.878
PG 21	08210000	27mm	1.063	1 1/16"(1.063)	28.2mm	1.11
PG 29	08290000	35.5mm	1.398	1 25/64"(1.391)	36.9mm	1.453
PG 36	08360000	45.5mm	1.791	1 51/64"(1.797)	48.8mm	1.921
PG 42	08420000	52.8mm	2.079	2 5/64"(2.078)	-	-
PG 48	08480000	58mm	2.283	2 9/32"(2.281)	-	-

CABLE GRIP
SELECTION GUIDE

Wire Size		Metric Size	PG Size	American Size
mm	Inches	Metric Size	PG Size	American Size
3-6.5	.12-.26	M12	PG7	-
4-8	.18-.32	M16	PG 9	3/8" NPT
6-10	.24-.39	M16	PG 11	-
6-12	.24-.47	M20	-	-
7-12	.28-.47	-	PG13.5	1/2" NPT
10-14	.39-.55	M20	PG16	-
13-18	.51-.71	-	PG21	3/4" NPT
14-18	.55-.71	M25	-	-
20-25	.79-.98	M32	PG29	1" NPT
24-32	.95-1.26	M40	PG36	-
32-38	1.26-1.50	M50	PG42	-
37-44	1.46-1.73	M63	PG48	-

Radel

PG gland thread sizes

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