NPS	Min Length of Thread		Outside Dia of Band D	Center to End A	Min WT
NPS	B	J	Outside Dia of Band D	Center to End A	Min WT
1/2	10.9	13.6	38	33	4.09
3/4	12.7	13.9	46	38	4.32
1	14.7	17.3	56	44	4.98
1¼	17	18	62	51	5.28
1½	17.8	18.4	75	60	5.56
2	19	19.2	84	64	7.14
2½	23.6	28.9	102	83	7.65
3	25.9	30.5	121	95	8.84
4	27.7	33	152	114	11.18
NPS	B	J	Outside Dia of Band D	Center to End A	Min WT
NPS	Min Length of Thread		Outside Dia of Band D	Center to End A	Min WT

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.

Composition ranges for 304 grade stainless steel

Grade

304

min.

max.

–

0.08

–

2.0

–

0.75

–

0.045

–

0.030

18.0

20.0

–

8.0

10.5

–

0.10

304L

min.

max.

–

0.030

–

2.0

–

0.75

–

0.045

–

0.030

18.0

20.0

–

8.0

12.0

–

0.10

304H

min.

max.

0.04

0.10

–

2.0

–

0.75

-0.045

–

0.030

18.0

20.0

–

8.0

10.5

–

Mechanical properties of 304 grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B) max	Brinell (HB) max
304	515	205	40	92	201
304L	485	170	40	92	201
304H	515	205	40	92	201
304H also has a requirement for a grain size of ASTM No 7 or coarser.

Physical properties of 304 grade stainless steel in the annealed condition

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
304/L/H	8000	193	17.2	17.8	18.4	16.2	21.5	500	720