MARYLAND METRICS
THREAD DATA CHARTS

METRIC THREAD -- ELECTRICAL THREAD -- Pg

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Pg thread usage will eventually be phased out in continental Europe. A new metric thread standard (EN 50262) will be phased in as mandatory beginning on March 1, 2001 replacing the Pg thread. Metric electrical threads are already in use in the UK where they have replaced the (now obsolete for electrical use) BSP threads.

PG

MARYLAND METRICS -- THREAD DATA CHART:

METRIC Pg ELECTRICAL THREAD DIN 40430 (Stahlpanzerrohr-Gewinde)

Pg Nominal Size Callout	Thread Form Type	Major Diameter mm d=D	Pitch mm p	Threads per inch tpi	Pitch Diameter mm d2=D2	Minor Diameter Male Thd. d1	Thread Height H1	Tap Drill Diameter mm	Radius mm
Pg7	Pg	12.5	1.27	20	11.89	11.28	0.61	11.4	0.14
Pg9	Pg	15.2	1.411	18	14.53	13.86	0.67	14	0.15
Pg11	Pg	18.6	1.411	18	17.93	17.26	0.67	17.25	0.15
Pg13.5	Pg	20.4	1.411	18	19.73	19.06	0.67	19	0.15
Pg16	Pg	22.5	1.411	18	21.83	21.16	0.67	21.25	0.15
Pg21	Pg	28.3	1.588	16	27.54	26.78	0.76	26.75	0.17
Pg29	Pg	37	1.588	16	36.24	35.48	0.76	35.5	0.17
Pg36	Pg	47	1.588	16	46.24	45.48	0.76	45.5	0.17
Pg42	Pg	54	1.588	16	53.24	52.48	0.76	52.5	0.17
Pg48	Pg	59.3	1.588	16	58.54	57.78	0.76	57.75	0.17

For clearance drill diameter: (Pg 7 thru Pg 13.5 add 0.1 mm to major diameter)
For clearance drill diameter: (Pg 16 thru Pg 48 add 0.25 mm to major diameter)
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