Black-oxide steel medium-strength threaded rods deliver a balanced combination of reliable load capacity and moderate corrosion resistance for everyday mechanical assemblies. Heat-treated to offer higher strength than standard low-carbon rods, they withstand moderate tensile forces while maintaining good ductility. The chemical black-oxide treatment adds surface lubricity to facilitate smooth assembly and provides a dark, non-reflective finish that helps resist light rust in dry environments. Featuring continuous threading along their full length, they are commonly used in machine manufacturing, fixture building, and automotive maintenance where dark aesthetics and dependable strength are needed.
Product Information
Please note:
Please note that this data is to be used ONLY FOR REFERENCE, NOT FOR DESIGN, and by using it,you agree that any decisions you make regarding materials for your project are at your own discretion.
Alloy
ASTM A193
Material Type
Steel
Metal Type
Alloy Steel
Shape
Threaded Rod
Grade
B7
Finish
Black Oxide
Brand
Metal Mart Studio
Thread
18 tpi
Diameter
0.625
Weight/Lineal Foot
0.84 pounds
Chemistry Information : ASTM A193 Alloy Steel
Element
Percentage
Element
Percentage
Element
Percentage
C
0.38
-
0.48
Mn
0.75
-
1
P
0.035
max
S
0.04
max
Si
0.15
-
0.35
Cr
0.8
-
1.1
Mo
0.15
-
0.25
Fe
96.75
-
97.7
