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5/8-11 X 6 A320 B8M Stainless Steel Stud Bolt

Selected A320 Grade B8 Stainless Steel Stud BoltA320 B8 Class 2 Stud Bolt
A320 Grade B8 Stainless Steel Stud BoltA320 B8 Class 2 Stud Bolt

Product Specification

Diameter
5/8
Length
6
Grade
Grade B8M
With Nut?
Bolt Only
Material
Stainless Steel
Finish
None
Country of Origin
Unrestricted Origin
Weight
0.426137

Mechanical Properties

AISI 316 Stainless Steel, Carbide Solution Treated Per ASTM A320/A320M-15a
Material Tensile
Strength		 Yield Strength,
0.2% offset		 Elongation in
2 in. or 50 mm		 Reduction
of Area		 Hardness
Min ksi Min ksi Min % Min % Max
316 Stainless Steel 75 30 30 50 223 HBW or 96 HRB (1)
  1. 1. For sizes 3⁄4 in. [20 mm] in diameter and smaller, a maximum hardness of 241 HBW (100 HRB) is permitted.

Governing Standards

ASTM A320 Covers alloy steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for low-temperature service.
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.

Grade B8M Stainless Steel Head Marking
Grade B8M Stainless Steel Material Marking

Stud Flange Charts

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 - - - - -
  1. All dimensions are in inches.

Chemical Properties

Per ASTM A320/A320M-15a
Grade Material Carbon Manganese Phosphorus Sulfur Silicon Nickel Chromium Molybdenum
% by weight % by weight % by weight % by weight % by weight % by weight % by weight % by weight
B8M 316 Stainless Steel 0.08 max 2.00 max 0.045 max 0.030 max 1.00 max 10.0-14.0 16.0-18.0 2.00-3.00