A193 B7M Full Thread Stud

Category:Full thread stud
Number of views:order
Release date:2025-04-14 15:21:24

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Product overview
性能特点
技术参数
商品评价

Implementation standard: ASME B 18.31.2

Product Overview: A193 B7M full thread studs and B7 full thread studs are similar because of their physical properties of high pressure resistance, high temperature resistance, and corrosion resistance, so they are widely used in pressure vessels, boilers, high pressure valves, petroleum and petrochemical equipment, radiators and other fields. In daily use in environments with high requirements for corrosion resistance, we will choose to achieve product corrosion resistance, temperature resistance, and abrasion resistance through Teflon (also known as PTFE (polytetrafluoroethylene)) surface treatment. Usually Teflon can be used at a continuous temperature of 260°C and at a temperature of 290-300°C for a short time. Teflon is not brittle at low temperatures and does not melt at high temperatures. It is very stable. When our B7M full thread studs have high performance, coating the surface with Teflon can have better pressure resistance, wear resistance, temperature resistance, corrosion resistance and other excellent properties. However, there are certain differences between the two. They have certain differences in heat treatment process and mechanical properties. B7M full-thread studs have high strength and toughness, the material has good hardenability, no obvious temper brittleness, and have higher fatigue limit and resistance to multiple impacts after quenching and tempering treatment. The toughness of low-temperature impact test is better, but the tensile strength and yield strength of B7 studs are higher than those of B7M.

Product material: ASTM A193 B7M

Product grade: B7M full thread stud tensile strength ≥690, hardness ≤235HBW

Product surface: black, blue-white zinc, colored zinc, black zinc, zinc-nickel alloy, hot-dip galvanizing, hot-dip galvanizing, gyromet, Dacromet, electrophoresis, Teflon, etc.

Product diameter: 1/4-20 teeth (1/4-28 teeth), 5/16-18 teeth (5/16-24 teeth), 3/8-16 teeth (3/8-24 teeth), 7/16-14 teeth (7/16-20), 1/2-13 teeth (1/2-20 teeth), 9/16-12 teeth (9/16-18 teeth), 5/8-11 teeth (5/8-18 teeth), 3/4-10 teeth (3/4-16 teeth), 7/8-9 teeth (7/8-14 teeth), 1"-8 teeth, 1-1/8-8 teeth, 1-1/4-8 teeth, 1-1/2-8 teeth, 1-5/8-8 teeth, 1-3/4-8 teeth, 2"-8 teeth, 2-1/2-8 teeth, 3"-8 teeth, 3-1/2-8 teeth, 4"-8 teeth

Product length: 1/4 inch - 50 inches length is available and customized

Product size

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Size unit: inch

①, U—— Thread chamfer distance:
The end chamfer is the dimension from the major diameter of the screw to less than or equal to the minor diameter. The distance from the chamfer end to the complete thread should be one to two pitch lengths each. The end of the stud should be perpendicular to the center of the stud, and both ends should be suitable for marking.

Thread size
d

1-1/2

1-5/8

1-3/4

1-7/8

2-1/4

2-1/2

2-3/4

3-1/4

3-1/2

3-3/4

d
PP	UNC
	UNF
	8UN
IN	Coarse tooth UNC	Minimum
		Maximum
	Fine tooth UNF	Minimum
		Maximum
	8UN	Minimum
		Maximum

1.5000	1.6250	1.7500	1.8750	2.0000	2.2500	2.5000	2.7500	3.0000	3.2500	3.5000	3.7500	4.0000
6	-	5	-	4 1/2	4 1/2	4	4	4	4	4	4	4
12	-	-	-	-	-	-	-	-	-	-	-	-
8	8	8	8	8	8	8	8	8	8	8	8	8
0.167	-	0.200	-	0.222	0.222	0.250	0.250	0.250	0.250	0.250	0.250	0.250
0.333	-	0.400	-	0.444	0.444	0.500	0.500	0.500	0.500	0.500	0.500	0.500
0.084	-	-	-	-	-	-	-	-	-	-	-	-
0.167	-	-	-	-	-	-	-	-	-	-	-	-
0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125
0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250