Stud Bolt Length Table

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Class	NPS (INCHES)	Bolt Diameter (INCHES)	Number of Studs	Connection	Recommended bolt length (inches)
150	1/2	1/2	4	RF	2.75
150	3/4	1/2	4	RF	2.75
150	1	1/2	4	RF	3
150	2	5/8	4	RF	3.5
150	3	5/8	4	RF	4
150	4	5/8	8	RF	4
150	6	3/4	8	RF	4.25
150	8	3/4	8	RF	4.5
150	10	7/8	12	RF	5
150	12	7/8	12	RF	5.25
150	14	1	12	RF	5.75
150	16	1	16	RF	5.75
150	18	1-1/8	16	RF	6.5
150	20	1-1/8	20	RF	6.75
150	24	1-1/4	20	RF	7.5
300	1/2	1/2	4	RF	3
300	3/4	5/8	4	RF	3.25
300	1	5/8	4	RF	3.5
300	1 1/2	3/4	4	RF	4
300	2	5/8	8	RF	3.75
300	3	3/4	8	RF	4.5
300	4	3/4	8	RF	5
300	6	3/4	12	RF	5.25
300	8	7/8	12	RF	6
300	10	1	16	RF	6.75
300	12	1-1/8	16	RF	7.25
300	14	1-1/8	20	RF	7.5
300	16	1-1/4	20	RF	8
300	18	1-1/4	24	RF	8.25
300	20	1-1/4	24	RF	8.75
300	24	1-1/2	24	RF	9.75
600	1/2	1/2	4	RF	3.5
600	3/4	5/8	4	RF	3.75
600	1	5/8	4	RF	4
600	1 1/2	3/4	4	RF	4.75
600	2	5/8	8	RF	4.5
600	3	3/4	8	RF	5.5
600	4	7/8	8	RF	6.25
600	6	1	12	RF	7.25
600	8	1-1/8	12	RF	8.25
600	10	1-1/4	16	RF	9
600	12	1-1/4	20	RF	9.25
600	14	1-3/8	20	RF	9.75
600	16	1-1/2	20	RF	10.75
600	18	1-5/8	20	RF	11.5
600	20	1-5/8	24	RF	12
600	24	1-7/8	24	RF	13.5
900/1500	1/2	3/4	4	RF	4.75
900/1500	3/4	3/4	4	RF	5
900/1500	1	7/8	4	RF	5.5
900/1500	1 1/2	1	4	RF	6
900/1500	2	7/8	8	RF	6.25
900	3	7/8	8	RF	6.25
900	4	1-1/8	8	RF	7.25
900	6	1-1/8	12	RF	8.25
900	8	1-3/8	12	RF	9.25
900	10	1-3/8	16	RF	9.75
900	12	1-3/8	20	RF	10.5
900	14	1-1/2	20	RF	11.25
900	16	1-5/8	20	RF	12
900	18	1-7/8	20	RF	13.5
900	20	2	20	RF	14.5
900	24	2-1/2	20	RF	18
1500	3	1-1/8	8	RF	7.5
1500	4	1-1/4	8	RF	8.25
1500	6	1-3/8	12	RF	10.75
1500	8	1-5/8	12	RF	12.25
1500	10	1-7/8	12	RF	14
1500	12	2	16	RF	15.5
1500	14	2-1/4	16	RF	16.75
1500	16	2-1/2	16	RF	18.5
1500	18	2-3/4	16	RF	20.25
1500	20	3	16	RF	22
1500	24	3-1/2	16	RF	25
2500	1/2	3/4	4	RF	5.25
2500	3/4	3/4	4	RF	5.5
2500	1	7/8	4	RF	6
2500	1-1/2	1-1/8	4	RF	7.25
2500	2	1	8	RF	7.5
2500	3	1-1/4	8	RF	9.25
2500	4	1-1/2	8	RF	10.5
2500	6	2	8	RF	14.25
2500	8	2	12	RF	15.75
2500	10	2-1/2	12	RF	20
2500	12	2-3/4	12	RF	22
900/1500	1/2	3/4	4	RTJ	4.75
900/1500	3/4	3/4	4	RTJ	5
900/1500	1	7/8	4	RTJ	5.5
900/1500	1-1/2	1	4	RTJ	6
900/1500	2	7/8	8	RTJ	6.25
900	3	7/8	8	RTJ	6.25
900	4	1-1/8	8	RTJ	7.5
900	6	1-1/8	12	RTJ	8.25
900	8	1-3/8	12	RTJ	9.5
900	10	1-3/8	16	RTJ	10
900	12	1-3/8	20	RTJ	10.75
900	14	1-1/2	20	RTJ	11.75
900	16	1-5/8	20	RTJ	12.25
900	18	1-7/8	20	RTJ	14
900	20	2	20	RTJ	15
900	24	2-1/2	20	RTJ	19
1500	3	1-1/8	8	RTJ	7.75
1500	4	1-1/4	8	RTJ	8.5
1500	6	1-3/8	12	RTJ	11.25
1500	8	1-5/8	12	RTJ	12.5
1500	10	1-7/8	12	RTJ	14.5
1500	12	2	16	RTJ	16.25
1500	14	2-1/4	16	RTJ	17.75
1500	16	2-1/2	16	RTJ	19.5
1500	18	2-3/4	16	RTJ	21.25
1500	20	3	16	RTJ	23.25
1500	24	3-1/2	16	RTJ	26.5
2500	1/2	3/4	4	RTJ	5.25
2500	3/4	3/4	4	RTJ	5.5
2500	1	7/8	4	RTJ	6
2500	1-1/2	1-1/8	4	RTJ	7.5
2500	2	1	8	RTJ	7.75
2500	3	1-1/4	8	RTJ	9.5
2500	4	1-1/2	8	RTJ	11
2500	6	2	8	RTJ	14.75
2500	8	2	12	RTJ	16.5
2500	10	2-1/2	12	RTJ	21
2500	12	2-3/4	12	RTJ	23