2 1/4-8 X 12 1/2 A193 B7 STUD BOLT

$80.17293/EA

Quantity	Price
Quantity	Price
1	$80.17293/ EA
10	$76.4048/ EA
20	$65.21266/ EA
40	$55.15096/ EA

3-5 Working Days

Product Specification
Governing Standards
Mechanical Properties
Chemical Properties
Stud Flange Chart
Substitute Products

Stud Flange Chart

Stud Flange ChartsASME B16.5

FLANGE		NOMINAL PIPE DIAMETER
CLASS	BOLTING	1/2	3/4	1	1-1/4	1-1/2	2	2-1/2	3	3-1/2	4
150#	Number	4	4	4	4	4	4	4	4	8	8
	Diameter	1/2	1/2	1/2	1/2	1/2	5/8	5/8	5/8	5/8	5/8
	Stud Bolt Length	2-1/4	2-1/2	2-1/2	2-3/4	2-3/4	3-1/4	3-1/2	3-1/2	3-1/2	3-1/2
	Mach Bolt Length	2	2	2-1/4	2-1/4	2-1/2	2-3/4	3	3	3	3
300#	Number	4	4	4	4	4	8	8	8	8	8
	Diameter	1/2	5/8	5/8	5/8	3/4	5/8	3/4	3/4	3/4	3/4
	Stud Bolt Length	2-1/2	3	3	3-1/4	3-1/2	3-1/2	4	4-1/4	4-1/4	4-1/2
	Mach Bolt Length	2-1/4	2-1/2	2-1/2	2-3/4	3	3	3-1/4	3-1/2	3-3/4	3-3/4
600#	Number	4	4	4	4	4	8	8	8	8	8
	Diameter	1/2	5/8	5/8	5/8	3/4	5/8	3/4	3/4	7/8	7/8
	Stud Bolt Length	3	3-1/2	3-1/2	3-3/4	4-1/4	4-1/4	4-3/4	5	5-1/2	5-3/4
900#	Number	4	4	4	4	4	8	8	8	-	8
	Diameter	3/4	3/4	7/8	7/8	1	7/8	1	7/8	-	1-1/8
	Stud Bolt Length	4-1/4	4-1/2	5	5	5-1/2	5-3/4	6-1/4	5-3/4	-	6-3/4
1500#	Number	4	4	4	4	4	8	8	8	-	8
	Diameter	3/4	3/4	7/8	7/8	1	7/8	1	1-1/8	-	1-1/4
	Stud Bolt Length	4-1/4	4-1/2	5	5	5-1/2	5-3/4	6-1/4	7	-	7-3/4
2500#	Number	4	4	4	4	4	8	8	8	-	8
	Diameter	3/4	3/4	7/8	1	1-1/8	1	1-1/8	1-1/4	-	1-1/2
	Stud Bolt Length	4-3/4	5	5-1/2	6	6-3/4	7	7-3/4	8-3/4	-	10
FLANGE		NOMINAL PIPE DIAMETER
CLASS	BOLTING	5	6	8	10	12	14	16	18	20	24
150#	Number	8	8	8	12	12	12	16	16	20	20
	Diameter	3/4	3/4	3/4	7/8	7/8	1	1	1-1/8	1-1/8	1-1/4
	Stud Bolt Length	3-3/4	4	4-1/4	4-1/2	4-3/4	5-1/4	5-1/4	5-3/4	6-1/4	6-3/4
	Mach Bolt Length	3-1/4	3-1/4	3-1/2	4	4	4-1/2	4-1/2	5	5-1/2	6
300#	Number	8	12	12	16	16	20	20	24	24	24
	Diameter	3/4	3/4	7/8	1	1-1/8	1-1/8	1-1/4	1-1/4	1-1/4	1-1/2
	Stud Bolt Length	4-3/4	4-3/4	5-1/2	6-1/4	6-3/4	7	7-1/2	7-3/4	8	9
	Mach Bolt Length	4-1/4	4-1/4	4-3/4	5-1/2	5-3/4	6-1/4	6-1/2	6-3/4	7-1/4	8
600#	Number	8	12	12	16	20	20	20	20	24	24
	Diameter	1	1	1-1/8	1-1/4	1-1/4	1-3/8	1-1/2	1-5/8	1-5/8	1-7/8
	Stud Bolt Length	6-1/2	6-3/4	7-1/2	8-1/2	8-3/4	9-1/4	10	10-3/4	11-1/4	13
900#	Number	8	12	12	16	20	20	20	20	20	20
	Diameter	1-1/4	1-1/8	1-3/8	1-3/8	1-3/8	1-1/2	1-5/8	1-7/8	2	2-1/2
	Stud Bolt Length	7-1/2	7-1/2	8-3/4	9-1/4	10	10-3/4	11-1/4	12-3/4	13-3/4	17-1/4
1500#	Number	8	12	12	12	16	16	16	16	16	16
	Diameter	1-1/2	1-3/8	1-5/8	1-7/8	2	2-1/4	2-1/2	2-3/4	3	3-1/2
	Stud Bolt Length	9-3/4	10-1/4	11-1/2	13-1/4	14-3/4	16	17-1/2	19-1/2	21-1/4	24-1/4
2500#	Number	8	8	12	12	12	-	-	-	-	-
	Diameter	1-3/4	2	2	2-1/2	2-3/4	-	-	-	-	-
	Stud Bolt Length	11-3/4	13-1/2	15	19-1/4	21-1/4	-	-	-	-	-

All dimensions are in inches.

Diameter	2 1/4
Length	12 1/2
Grades	Grade B7
With Nut?	Bolt Only
Material	Steel
Finish	Black
Origin	Unrestricted Origin
Weight	12.96875,

ASTM A193	Covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
ASME B18.31.2	Covers the complete dimensional and general data for continuous thread, flange studs (stud bolts), and double-end inch-dimensioned studs.
ASME B1.1 UNC & UNF Class 2A	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Alloy Steel, Quenched & Tempered			Per ASTM A193/A193M-16
Diameter	Tempering Temperature	Tensile Strength	Yield Strength, 0.2% offset	Elongation in 4D	Reduction of Area	Hardness
Diameter	Min	ksi	Min ksi	Min %	Min %	Max
2 1/2" and under	1100F	125	105	16	50	321 HBW or 35 HRC
over 2 1/2 to 4"	1100F	115	95	16	50	321 HBW or 35 HRC
over 4 to 7"	1100F	100	75	18	50	321 HBW or 35 HRC

Per ASTM A193/A193M-16
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Molybdenum
Grade	Material	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight	% by weight
B7	Alloy Steel	0.38-0.48 (1)	0.75-1.00	0.035 max	0.040 max	0.15-0.35	0.80-1.10	0.15-0.25

2 1/4-8 X 12 1/2 A193 B7 STUD BOLT

Technical Data

Product Specification

Governing Standards

Governing StandardsGrade B7

Mechanical Properties

Mechanical PropertiesGrade B7

Chemical Properties

Chemical PropertiesGrade B7

Stud Flange Chart

Stud Flange ChartsASME B16.5

Substitute Products

2 1/4-8 X 12 1/2 A193 B7 STUD BOLT DOMESTIC

2 1/4-8 X 12 1/2 A193 B7 STUD BOLT DOMESTIC