High Tensile Fasteners

Reliable HT Nut Bolt manufacturer in India
What is High Tensile Fasteners?
High tensile fasteners are made of high strength materials such as medium carbon steel or alloy steel and they heat treated to enhance their strength and mechanical properties. They are specifically designed to withstand high stree, load and tension without failing. High strength nuts and bolts are manufactured as per ISO 898-1 or BS EN 14399 standard.
Table of Content

High Tensile Fasteners Specification
High Tensile Bolt Sizes
M2 to M24
HT Screw Size
3/6″ to 2″
High Strength Nuts Size
M3 – M56 | 3/6″ to 2″
HT Steel Washers Size
M3 – M56 | 3/6″ to 2″
HT Machine Screws Size
M1.6 – M12
ISO Standard
ISO 898-1
High tensile Studs Type
Fully or Fine threaded / Tap-End / Double-End
Origin
Indian / Korean / Russian / European
High tensile strength bolts Condition
Threading / Cold Drawn
High tensile cold forged fasteners Threads
BSF / UNF / METRIC / BSW / UNC
High tensile strength lag bolts Standards
DIN 976, 931, 934, 7991, 933, 125 / ASME B18.2.1, B18.3
Custom Sizes
We are Manufacturer of High Tensile fastners in custom sizes
High Tensile fasteners Length
3 mm to 200 mm
HT Steel UNC Bolts Thermal Conductivity
45–50 W/m·K
High Tensile Fasteners Melting Point
1425–1540 °C
Manufacturing Technique
Hot forging / CNC Machined / Cold forging
High temp Screws Thread Pitch
Fine Threads / Coarse Threads
Cold forged high tensile fasteners Finish
Passivation / Phosphating / HDG
High tensile hex head bolts Head Types
- Slotted hex washer
- Socket cap head
- Button head
- Slotted Drive
- Phillips Drive
- Hex washer head
- Flat
HT Steel Hex Bolt Drive Style
- Round
- Cross
- Oval
- Truss
- Pan
- Torx
- Hex
High strength screws Thread Class
- Class 2A (Medium fit)
- 3G
- Class 1A (Loose fit)
- 4G
- 5 ONF
- 2G
- Class 3A (Tight fit)
Certificate
- UT and PMI Test
- Raw Materials Certificate
- 100% Radiography Test
- EN 10204/3.1B
Packaging
- Blister Packs
- Wooden Pallet
- Wooden Cases
- Carton Box
Value Added Services
- Head Shank Drilling
- Laser Etching
- Color Coding
- Head Painting
We are one of the leading High Tensile Fasteners manufacturer in India in M3 to M24 size range. We manufacture High temp bolts as per ISO 898-1 and BS EN 14399.
View updated price list of high tensile automotive bolts and eye bolts
High tensile bolts price list in india
Product | Price in USD (100 Pcs) |
Price in Dirham (100 Pcs) |
Price in Euro (100 Pcs) |
---|---|---|---|
M10X20MM High Tensile Grade 8.8 Bolts, DIN933 | US $0.84 | 3.09 AED | € 0.74 |
M12X25MM High Tensile Grade 8.8 Bolts, DIN933 Full Thread | US $1.09 | 4.00 AED | € 0.96 |
M12X50MM High Tensile Grade 8.8 Bolts, DIN933 | US $1.29 | 4.74 AED | € 1.14 |
We are giving 5% discount on high tensile bolts, contact us on sales@rishabhsteelindustries.com to get a quote. We are stockist of high strength nuts and bolts in Mumbai and supplying in countries like Germany, Spain, Nigeria, UAE, Malaysia, Indonesia and UAE
Manufacturing Range of High tensile hex head bolts
Diameter | Length | Thread Type | Standards | Manufacturing Capabilities |
---|---|---|---|---|
M5 to M64 | 10 mm to 1000 mm | Metric UNC UNF BSW BSF |
ISO 898-1 DIN 933 / 931 BS 3692 IS 1364 / IS 3757 |
Cold Forging Hot Forging Thread Rolling Heat Treatment |
Leading supplier of cold forged high tensile fasteners and high tensile strength lag bolts
Types of High strength fasteners

High tensile bolts and nuts

HT automotive bolts

High strength allen bolts

HT Steel anchor bolts

high tensile cap screws

High temperature Studs

High strength threaded rod

high tensile steel heavy hex nuts

HT Screws

Cold forged high tensile Stud bolts

High strength Washer

High temp bolts
Reliable High tensile bolts manufacturer in India in zinc plated and galvanised finishes. We have exported these fasteners in wide range of sizes and diameters.
High tensile countersunk bolts and screw used in extensive stress applications
Cold forged High tensile fasteners Operating Temeperature
Operating Temeperature | -420° to +550°F (-250° to 285°C) |
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Refer specification and grades of high tensile cold forged fasteners and flange bolts which widely used in automotive industry
ASTM F568 High Tensile Lag Bolts chemical composition
Material grade | Carbon | Manganese | Phosphorus | Sulfur |
---|---|---|---|---|
4.6 | 0.55 max | - | 0.05 | 0.06 |
5.6 | 0.13-0.55 | - | 0.05 | 0.06 |
6.8 | 0.15-0.55 | - | 0.05 | 0.06 |
8.8 | 0.25-0.55 | - | 0.05 | 0.06 |
10.9 | 0.25-0.55 | - | 0.05 | 0.06 |
High Tensile F568 Heavy Hex Bolts Melting Point
Melting Point | 1425–1540 °C |
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Manufacturing process of High Tensile Fasteners

Size | Nominal (Major) | Head Height | Width Across Flats | ||
---|---|---|---|---|---|
Diameter [in] | Min [in] | Max [in] | Min [in] | Max [in] | |
#2 | 0.086 | 0.04 | 0.05 | 0.12 | 0.125 |
#4 | 0.112 | 0.049 | 0.06 | 0.181 | 0.188 |
#6 | 0.138 | 0.08 | 0.093 | 0.244 | 0.25 |
#8 | 0.164 | 0.096 | 0.11 | 0.244 | 0.25 |
#10 | 0.19 | 0.105 | 0.12 | 0.305 | 0.312 |
1/4" | 0.25 | 0.172 | 0.19 | 0.367 | 0.375 |
5/16" | 0.3125 | 0.208 | 0.23 | 0.489 | 0.5 |
3/8" | 0.375 | 0.27 | 0.295 | 0.551 | 0.562 |

Nominal Bolt Diameter | Body Diameter Ds | Head Height, K | Width Across Corners, E | Width Across Flats, S | Wrenching Height, K1 | ||||
---|---|---|---|---|---|---|---|---|---|
Max | Min | Max | Min | Max | Min | Max | Min | Min | |
M36 x 4 | 37 | 35 | 23.55 | 21.72 | 69.28 | 66.44 | 60 | 58.8 | 15.8 |
M20 x 3.5 | 30.84 | 29.16 | 19.75 | 17.92 | 57.74 | 55.37 | 50 | 49 | 13.1 |
M24 x 3 | 24.84 | 23.16 | 15.9 | 14.56 | 47.34 | 45.2 | 41 | 40 | 10.5 |
M20 x 2.5 | 20.84 | 19.16 | 13.4 | 12.12 | 39.26 | 37.29 | 34 | 33 | 8.8 |
M16 x 2 | 16.7 | 15.3 | 10.75 | 9.68 | 31.18 | 29.56 | 27 | 26.16 | 7 |
M14 x 2 | 14.7 | 13.3 | 9.25 | 8.51 | 27.71 | 26.17 | 24 | 23.16 | 6.2 |
M12 x 1.75 | 12.7 | 11.3 | 7.95 | 7.24 | 24.25 | 22.78 | 21 | 20.16 | 5.2 |
DIN 912 High Tensile Bolts Hex Nut Dimensions
Size | Nominal (Major) | Thickness | Width Across Flats | ||
---|---|---|---|---|---|
Dia [in] | Min [in] | Max [in] | Nominal [in] | Min [in] | |
3/8" | 0.375 | 0.239 | 0.257 | 5/8"(0.625) | 0.607 |
5/16" | 0.312 | 0.208 | 0.225 | 9/16"(0.562) | 0.545 |
1/4" | 0.25 | 0.178 | 0.193 | 7/16"(0.438) | 0.423 |
#10 | 0.19 | 0.117 | 0.13 | 3/8"(0.375) | 0.362 |
#8 | 0.164 | 0.117 | 0.13 | 11/32"(0.344) | 0.332 |
#6 | 0.138 | 0.102 | 0.114 | 5/16"(0.312) | 0.302 |
#4 | 0.112 | 0.087 | 0.098 | 1/4"(0.250) | 0.241 |
#2 | 0.086 | 0.057 | 0.066 | 3/16"(0.188) | 0.18 |
#0 | 0.06 | 0.043 | 0.05 | 5/32"(0.156) | 0.15 |
SST life of high tensile bolts
Salt spray SST life | Above 1000 hrs |
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Features of High tensile imperial bolts



Yes, High tensile bolt can rust if they are not properly coated or protected. To prevent corrosion of these bolts Zinc Plating or Phosphate Coating can be done.
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