Heavy hex nuts

Usages for Heavy Hex Nuts

Heavy hex nuts are required by AISC and RCSC specifications for use with ASTM A325 and A490 structural bolts in steel construction, and are the standard nut for ASTM A193 B7 and B8 stud bolt assemblies in pressure vessel and flange connections. They are also used in high-torque mechanical assemblies where the larger wrench flat size provides better tool engagement and the additional thread engagement improves joint reliability. A563 Grade DH and DH3 heavy hex nuts are proof-load tested and meet the proof load and hardness requirements for structural applications.

Heavy Hex Nuts for all Industries

Heavy hex nuts are used across structural steel construction, bridge and infrastructure, pressure vessel and piping fabrication, power generation, petrochemical processing, and heavy industrial plant construction. Structural engineers, steel fabricators, piping contractors, and plant maintenance teams specify A563 heavy hex nuts as the matching nut component for high-strength bolt assemblies. Blue Ribbon Fastener provides heavy hex nuts with the grade certifications and availability required for structural and industrial procurement programs.

Heavy Hex Nuts Features for Engineers & Buyers:

• ASTM A563 grades C, D, DH, and DH3 available
• Grade DH and DH3 are proof-load tested for structural applications
• Carbon steel (plain and zinc-plated) and hot dip galvanized (ASTM A153) finishes
• Dimensions per ASME B18.2.2 heavy hex standards
• Compatible with A325, A490 structural bolts and A193 B7 stud bolts
• Available in inch sizes from 1/2" through 2-1/4"
• Volume and project pricing available — call or request a quote