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High Tensile Bolts and Nuts

  " Biggest manufacturer of larger diameter bolts in India "
Stud Bolts Anchor Bolt Hex Bolts U Bolt Nuts Washers
  • Fasteners, Hex bolts  as per  DIN 931, DIN 933, DIN 912   in grades  8.8 , 10.9 , 12.9
  • Hex nuts  as per  DIN 934  in grades  8, 10 , 12
  • Biggest manufacturer of larger diameter hex bolt and fasteners in India, diameter range from  M-20 to M-64 in DIN 931 / 933 / 912 in grades 8.8, 10.9, 12.9
  • Bigger diameter bolts for ductile iron pipes for water projects, sewage treatment plants, desalination plants and water treatment plants in Middle east.
  • Petrochemical stud bolts and nuts as per  ASTM grades A 193 /  A194   in alloy and stainless steels
  • 100% machining on  CNC machines for better accuracies and repeatability and reliable products
  • 100% bolts thread rolled after heat treatment to give extra strength and fatigue life to the threads.
  • In house heat treatment with controlled atmosphere and temprature controls
  • In House tooliong of dies
  • Exports to over 56 countries in 5 different continents all over the world
  • Fasteners for wind mills, petrochemical industry, chemical industry, ship building industry, heavy engineering industry, water treatment and sewage treatment plants, ASTM Stud bolts and nuts
  • Over  128 employees in 2 state of the art manufacturing facilities  in Kundli Industrial Area, Delhi NCR.
  • In house CNC machining of critical components in steels, alloys and stainless steels.
  HEX Products
Standards DIN EN ISO 4014 & 4017 DIN 931 / 933 & IS 1364 / IS 1363
Grade 8.8 / 10.9 / 12.9
Size Dia M 20 to 100 mm
Inch 3/4" to 3.1/2"
Finish Plain / Zinc plated / Hot dip galvanised
Standards DIN EN ISO 4032 DIN 934 / 970 & IS 1363 / IS 1364 - 67
Grade 8, 10, 12
Size Dia M 20 to 100 and Inch 3/4" to 4"
Finish Plain / Zinc plated / Hot dip galvanised
Standards IS 2015 / 3064 DIN EN ISO 3063 DIN 125 / ISO 7090
Grade Carbon steel, Alloy steel and spring steel
Size Dia M 20 to 100 and Inch 3/4" to 4"
Finish Plain / Zinc plated / Hot dip galvanised
  Standard fasteners range in High tensile

Rollfast is the biggest and the largest manufacturer in India for bigger diameter hex bolts and nuts in high tensile grade from M-20 diameter and above till M-100 by hot firging process, our two manufacturing facilities in north India near New delhi are currently producing hex bolts and nuts upto M-100 in bigger sizes the complete range of bigger bolts is given below

  • Standard hexagon Bolts / Screws
  • Hexagon nuts
  • Carriage bolts
  • Heavy hex bolts
  • Shoulder bolts
  • Hot dip galvanised hex bolts for wind energy and wind mills
  • High strength friction grip bolts and nuts
  • Banjo bolts
  • Hub bolts
  • Wheel bolts
  • Track shoe bolts and nuts
  Surface finished
  • Heat treated and ground finish
  • Zinc plated with white / blue / yellow / green / black passivations
  • Hot dip galvanised
  • Zinc phosphate and oiled
  • Flouro carbon coating
  • Geoment and Dacromet and many different top coats with salt spray tests
  In house testing ( Quality Test Plan )
  • Tensile testing, 600 KN machine
  • Profile projector
  • Hardness tester for brinell and rockwell hardness
  • Impact testing
  • Low load hardness tester
  • ISO 9001:2008 certified
  • Certified quality systems
  In house Heat treatment
  • Controlled atmospheric hardening furnace for bolts, pit type with tempratures upto 1000 degrees ·  
  • Tempering furnace, pit type
  • Annealing furnace
  • Normalising furnace
  • Controlled furnace with Carbon potential monitor
Contact Us     (91) 98110 09061
  Roll Fast High Tensile Fasteners, Washers, Nuts, High Tensile Bolts, High tensile Screws, High Tensile Bolt, Delhi NCR, India Roll Fast
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High Tensile Bolts and nuts grade 10.9 and grade 8.8 and high tensile fasteners manufacturers, suppliers and exporter in India