Dimensions Threaded Full and Half CouplingsASME B16.11

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Class 3000
NPS	Length	Outside Dia	Min Thread Length
	A	D	B	J
1/2	48	28	10.9	13.6
3/4	51	35	12.7	13.9
1	60	44	14.7	17.3
1.1/4	67	57	17	18
1.1/2	79	64	17.8	18.4
2	86	76	19	19.2
2.1/2	92	92	23.6	28.9
3	108	108	25.9	30.5
4	121	140	27.7	33

Class 6000
NPS	Length	Outside Dia	Min Thread Length
	A	D	B	J
1/2	48	38	10.9	13.6
3/4	51	44	12.7	13.9
1	60	57	14.7	17.3
1.1/4	67	64	17	18
1.1/2	79	76	17.8	18.4
2	86	92	19	19.2
2.1/2	92	108	23.6	28.9
3	108	127	25.9	30.5
4	121	159	27.7	33

General notes..

• Dimensions are in millimeters unless otherwise indicated.
• Dimension (B) is minimum length of perfect thread.
  The length of useful thread (B plus threads with fully formed roots and flat crests) shall not be less than J.

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