Bolt & Nut
Stud bolts, nuts, and fastener material and dimension standards.
ASTM A193
ASTMAlloy-Steel and Stainless Steel Bolting for High-Temperature/High-Pressure Service
Bolting materials such as B7 (alloy) and B8/B8M (stainless) for high-temperature or high-pressure flanged joints and pressure equipment.
ASTM A194
ASTMCarbon and Alloy Steel Nuts for High-Pressure/High-Temperature Service
Nuts such as Grade 2H (carbon/alloy), 4/7 (alloy), and 8/8M (stainless) matched to A193/A320 bolting.
ASTM A320
ASTMAlloy/Stainless Steel Bolting for Low-Temperature Service
Bolting (e.g. L7, L43, B8 Class 2) with mandatory impact toughness for low-temperature and cryogenic flanged joints.
ASTM A307
ASTMCarbon Steel Bolts and Studs
Carbon steel bolts, studs, and threaded rod (Grades A, B, C) of 60 ksi tensile for general and structural use.
ASME B18.2.1
ASMESquare, Hex, Heavy Hex Bolts and Screws (Inch Series)
Dimensions and tolerances for inch-series square, hex, heavy hex bolts and screws, including lag and flange screws.
ASME B18.2.2
ASMENuts for General Applications (Inch Series)
Dimensions and tolerances for inch-series hex, heavy hex, square, flange, and coupling nuts.
ISO 898
ISOMechanical Properties of Fasteners
Property classes (e.g. 8.8, 10.9, 12.9) and mechanical properties of carbon and alloy steel fasteners in the metric system.
ISO 4032
ISOHexagon Regular Nuts (Metric)
Dimensions for metric hexagon regular (style 1) nuts, product grades A and B.
ISO 4014
ISOHexagon Head Bolts (Metric)
Dimensions for metric hexagon head bolts (partially threaded), product grades A and B.
ISO 4017
ISOHexagon Head Screws (Metric, Fully Threaded)
Dimensions for fully threaded metric hexagon head screws (set screws / tap bolts), product grades A and B.
ASME PCC-1
ASMEPressure Boundary Bolted Flange Joint Assembly
Guidance for assembling, tightening, qualifying personnel, and troubleshooting pressure-boundary bolted flange joints.