Thread standards & thread types | Norres Baggerman Group

Here you will find a tabular overview of the most important thread standards and thread types. In addition to the respective thread size, the associated outside diameters and thread pitch are also listed. This provides quick guidance for selecting suitable connections and components.

M thread acc. to EN 60423, IEC 423 or BS 6053 ISO 68, DIN 13 Metric thread			PG thread acc. to DIN 40430 PG thread			UNEF thread acc. to ANSI/ASME B 1.1 UNEF thread
M	Outer Ø	Pitch	PG	Outer Ø	Pitch	UNEF	Outer Ø		Pitch
8	8	1	7	12,5	1,27	¹/₂“ - 28	0,5000	12,700	0,9070
10	10	1	9	15,2	1,41	⁵/₈“ - 24	0,6250	15,875	1,0580
12	12	1,5	44	18,6	1,41	³/₄“ - 20	0,7500	19,050	1,2700
16	16	1,5	46,8	20,4	1,41	⁷/₈“ - 20	0,8750	22,225	1,2700
20	20	1,5	16	22,5	1,41	¹⁵/₁₆“ - 20	0,9375	23,813	1,2700
25	25	1,5	21	28,3	1,588	1“ - 20	1,0000	25,400	1,2700
32	32	1,5	29	37,0	1,588	¹³/₁₆“ - 18	1,1875	30,163	1,4110
40	40	1,5	36	47,0	1,588	¹⁷/₁₆“- 18	1,4375	36,513	1,4110
50	50	1,5	42	54,0	1,588	¹³/₄ “- 18	1,7500	44,450	1,7205
63	63	1,5	48	59,3	1,588	2“ - 18	2,0000	50,800	1,9706

NPT thread acc. to ANSI/ASME B 1.20.1 NPT thread			G thread acc. To JIS B 0204, DIN ISO 2289-1 or BS 2779 CTG thread
NPT	Outer Ø	Pitch	CTG	R	Outer Ø	Pitch
¹/₄“	13,716	1,411		¹/₄“	13,16	1,340
³/₈“	17,145	1,411	G 16	¹/₂“	20,96	1,810
¹/₂“	21,336	1,814	G 22	³/₄“	26,44	1,810
³/₄“	26,670	1,814	G 28	1“	33,25	2,310
1“	33,401	2,208	G 36	1 ¹/₄“	41,91	2,208
1 ¹/₄“	42,164	2,208	G 42	1 ¹/₂“	47,80	2,310
1 ¹/₂“	48,260	2,208	G 53	2“	59,61	2,310
2“	60,325	2,208

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Thread standards / thread types