Overview
HSFG Nut
M16 – M36 | Grade 8.8 & 10.9
High Strength Friction Grip (HSFG) nuts manufactured to IS 6623 for use exclusively with HSFG bolts in slip-critical structural steel connections. Engineered to develop the full clamping force required for friction-type joints. Available in Grade 8.8 and Grade 10.9 with black and hot-dip galvanised finishes. Used in bridges, transmission towers, industrial steel structures, and heavy fabrication where joint integrity under dynamic, shear, and fatigue loads is critical.
Key Features & Benefits
- Manufactured to IS 6623 for slip-critical joints
- Grade 8.8 and Grade 10.9 for high-load structural use
- Engineered for full clamping force with HSFG bolts
- Black and HDG finishes for varied site conditions
- Consistent proof load for reliable torque tightening
- ISO metric coarse thread for precise mating
- Suitable for turn-of-nut and torque wrench tightening
- Compatible with IS 3757 HSFG bolt assemblies
01
Specially heat-treated steel offers extreme clamping force limit parameters.
02
Matches HSFG structural bolts used in heavy bridge trusses and skyscrapers.
03
IS 6623 conforming threads avoid thread stripping under high installation torque.
