bigger sizes M24 to M64 (8.8 10.9) grade factory monthly production about 300 tons, hot forging process bolts & nuts manufacturing for the wind energy sector.

These bolts are forged on heavy upsetting machines and are then machined on latest CNC machines in our factory, we also do the heat treatment in our factory using an advanced polymer quenching technology which gives a very fast rate of cooling for these bolts & nuts in heat treatment, the result is a perfect martensite after hardening and gives perfect results after tempering as per standard requirement.

These high tensile bolts in bigger diameters can also be thread rolled after heat treatment to get better fatigue life for these bolts. Thread rolling after heat treatment results in a better life of the bolting and removes any concern of carburising or decarburising in heat treatment process.

ALLOY STEEL     Standard DimensionDescriptionDiameterLengthFinishMaterial GradeISO 4014Hex Head boltsM-12 to M-10030 mm to 1200 mmPlain / Zinc plated / HDG 6az / Teflon / PTFE / Zinc aluminum flake / Geomet10.9 / 12.9DIN 931ISO 4017Hex Head ScrewsM-12 to M-10030 mm to 1200 mmPlain / Zinc plated / HDG 6az / Teflon / PTFE / Zinc aluminum flake / Geomet10.9 / 12.9DIN 933ANSI B18.2.1Heavy Hex Head bolts1/2" to 4"1" to 48"Plain / Zinc plated / HDG / Teflon / PTFE / Zinc aluminum flake / GeometASTM A 193 B-7 / L-7 / B-16BS 1768Hex Head Screws1/2" to 4"30 mm to 1200 mmPlain / Zinc plated / HDG / Teflon / PTFE / Zinc aluminum flake / GeometASTM A 193 B-7 / L-7 / B-16CARBON STEEL     Standard DimensionDescriptionDiameterLengthFinishMaterial GradeISO 4014Hex Head boltsM-12 to M-10030 mm to 1200 mmPlain / Zinc plated / HDG 6az4.6, 5.6, 6.6, 8.8DIN 931ISO 4017 / DIN 933Hex Head ScrewsM-12 to M-10030 mm to 1200 mmPlain / Zinc plated / HDG 6az4.6, 5.6, 6.6, 8.8ANSI B18.2.1Heavy Hex Head bolts1/2" to 4"1" to 48"Plain / Zinc plated / HDGS, R, TBS 1768Hex Head Screws1/2" to 4"30 mm to 1200 mmPlain / Zinc plated / HDGA, B, C