Stud Bolt or Studs,sometimes called Full thread rods are externally threaded fasteners that typically look like and operate as threaded bars. They’re different from screws and bolts in the fact that they don’t usually have a head that requires tightening — just continuous threading that can be paired with nuts
Stud bolts are the bolting material or fastener used to tighten the flange joint connection according to ASME B16.5 Code
Stud Bolt Standards
ANSI/ASME B18.31.2
ANSI/ASME B16.5
DIN 975
| Carbon Steel | Stainless Steel | Duplex & Super Duplex |
| • ASTM A193 B7 | • ASTM A193 B8 CL1/CL2 | • ASTM A182 F51, S31803 |
| • ASTM A193 B7M | • ASTM A193 B8M CL1/CL2 | • ASTM A182 F53, S32750 |
| • ASTM A193 B16 | • ASTM A193 B8C CL1/CL2 | • ASTM A182 F55, S32760 |
| • ASTM A320 L7 | • ASTM A193 B8T CL1/CL2 | |
| • ASTM A320 L7M | • ASTM A320 B8 CL1/CL2 | |
| • ASTM A320 L43 | • ASTM A320 B8M CL1/CL2 | |
| • ASTM A325 | • ASTM A320 B8C CL1/CL2 | |
| • ASTM A320 B8T CL1/CL2 | ||
| • ASTM A453 660 | ||
| • ASTM A453 662A | ||
| • ASTM A453 665B |
| Nominal size or diameter | 1″ and smaller | 1 1/8″ and larger |
| INCH SERIES | UNIFIED COARSE THREAD SERIES | UNIFIED 8 THREAD SERIES |
| CLASS 2A ASME B1.1 | CLASS 2A ASME B1.1 | |
| Nominal size or diameter | 1″ and smaller | 1 1/8″ and larger |
| METRIC SERIES | METRIC COARSE THREAD SERIES | METRIC FINE AND COARSE PITCH THREADS |
| CLASS 6g ISO 68/ IS0 965 | CLASS 6g ISO 68/ ISO 965 |
Fastener Surface coatings
Blacken
zinc coated, hot dipped galvanized, cadmium coated,
PTFE coated, TEFLON coated, XYLAN coated
Colors: blue, green, red, silver, black, grey and zinc, etc.
ASTM A193 B8M is a stainless steel grade for stud bolts, primarily used in high-temperature, high-pressure, and corrosive environments like chemical processing, marine, and offshore industries. Grase B8M Bolt is made of SS316 round bar.Which offers a superior corrosion resistance compared to B8 (304 stainless steel).
ASTM A193 B8M Stud Bolts with A194 8M Hex nuts Read More »
ASTM A320 L7M is manufactured from AISI 4140 round bar and is supplied in a quenched and tempered condition.The maximum hardness of Grade L7M shall be 235 HBW or 99 HRB (conversion in accordance with Table Number 2B of Test Methods and Definitions A370). Minimum hardness shall not be less than 200 HBW or 93 HRB. Conformance to this hardness shall be ensured by testing each bolt or stud by Brinell or Rockwell B methods in accordance with 6.3.1
ASTM A320 L7M STUD BOLT C/W 2 A194 7M HEAVY HEX NUTS Read More »
Hardness testing is a physical analysis method for determining the strength of components and is a branch of metallography.Different stud bolt grades have specific hardness requirements based on industry standards.
hardness test for Stud bolts Read More »
Xylan® 1424 is primarily formulated for use on fasteners to prevent corrosion and facilitate make-up and break-out torque
Xylan 1424 coated ASTM A193 B7 stud bolts Read More »
As a leading manufacturer and exporter in China, we specialize in Manufacturing Xylan 1070 coated ASTM A193 B7 stud bolts. These fasteners are designed for high-temperature, high-pressure, and corrosive environments, ensuring enhanced durability and performance. Xylan 1070, a fluoropolymer coating, offers superior protection against wear, corrosion, and chemical exposure, making it an ideal choice for demanding industrial applications.
Xylan 1070 coated ASTM A193 B7 stud bolts Read More »