
Most Trusted HDG Bolts and Nuts Manufacturer in India
| Ready Stock: | M2 to M80 |
|---|---|
| Custom Sizes: | Up to 4″ |
| Length: | 3 mm to 2000 mm long |
| International Standard: | DIN 931, DIN 933, DIN 934, DIN 970, ANSI B 18.2.4 2M, ANSI B 28.2.4 1M, ASME B18.5, ASME B16.5 |
| Raw Material Origin: | SA, Europe, New Zealand, South Africa, Algeria, United Kingdom, Morocco, Australia India etc |
| MTC: | EN 10204/3.1B |
| Suitable Environment: | Salt Water and Mild Acids |
| Thread Pitch: | Fine Thread and Coarse Thread |
| Finish: | Phosphating, HDG, Oxidation |
| Threads: | UNJ, UNC, UNF, Rolled, UNR |
| Temperature Range: | -148°F to 192°F |
| To Know About Latest Price List of Hot Dip Galvanized Fasteners Please Contact Us | |

Hot Dipped Galvanized Nuts

Galvanized Bolts

Hot Dipped Galvanized Screws
The protection of steel fasteners against corrosion has been around for a long time, but hot-dip galvanising (HDG) is one of the oldest and most often used methods. The Hot Dip Galvanised Fasteners coating requires very little maintenance and offers superior corrosion protection to steel buildings for a period of fifty to seventy years in the majority of atmospheric climates .
Hot Dip Galvanised Fasteners offer two distinct forms of protection against corrosion: barrier and galvanic (cathodic). It prevents corrosion of steel by functioning as a barrier that is only partially permeable to the environmental factors that are responsible for the corrosion. In addition, given that zinc is a more reactive metal than steel, the zinc galvanised coating will “sacrifice” or corrode first, therefore shielding the steel substrate from further damage. Due to the fact that the rate of corrosion of zinc is at least ten times slower than the rate of corrosion of steel, a thin covering of zinc may preserve steel for an extended period of time.
Table of Content
- Hot Dip Galvanized Fasteners Specification
- HDG Anchor Bolts Size Chart
- Price List of A325 Galvanized Fasteners
- Galvanized Hex Bolt Dimensions
- Hot Dip Galvanized Stud Bolts Dimension
- HDG Washers Dimensions
- Galvanized Screws Tensile Strength
- Applications Of Galvanized Carriage Bolts
- Types of HDG Fasteners
- Galvanized Flat Washers Torque Chart
- Performance of Zinc Layer Galvanized Heavy Hex Nuts
- Galvanized Heavy Hex Nuts Tolerance Chart
The process of hot-dip galvanising begins with the meticulous cleaning of the surface of the fastener and the removal of any organic pollutants such as dust, gasoline, or oil. Scale and corrosion may be removed by pickling the object in a mixture of diluted sulfuric acid that is warmed, or in a mixture of hydrochloric acid that is put at room temperature. After that, the fasteners are given another washing in clean water. After being meticulously cleaned, the components are then submerged in a flux tank, which normally contains an aqueous solution of zinc ammonium chloride. Before the steel can be galvanised, the oxides need to be removed using fluxing, which also prevents new oxides from developing on the surface of the steel. In addition, fluxing encourages the adhesion of the zinc to the surface of the steel.
Vision Alloys is Most Economical Hot Dip Galvanized Fasteners Manufacturer in India
HDG Bolts and Nuts Manufacturers in India
Find Hot Dip Galvanized Fasteners Manufacturer in India Offer Detail Specification
- M10-M160
- 43 to 86 microns
- M6 to M80
- Fine
- Coarse
- Cold Forging
- CNC Machined
- Hot Forging
- A
- D
- C
- G
- B
- E
- Plain, Electric galvanized
- Phosphating, Zinc impregnation
- Oxidation, DACROMET
- EN 10204 / 3.1
- ISO 4032
- ISO 4033
- 100% Tested Hot Dip Galvanized Fasteners with MTC EN 10204 3.1/3.2

- UNC
- UN8
- BSW
- UTS
- ACME
- UNF
- UNR
- UNM
- BSF
- hex bolt
- bolt
- nuts
- threaded rod
- screws
- washers
- stud bolt
- Bagging
- Head Shank Drilling
- Thread Locking
- Head Painting
- Oval
- Hexagon washer
- Pan
- Cross
- Truss
- Torx
- Round
- Hex
- Truss
- Flat
- Phillips Drive
- Socket cap head
- Button head
- Slotted Drive
- Combination Drive
- Slotted hex washer
- Hex washer head
- Frearson Drive
- Pan
- Hex head
- Oval
- 5 CSF
- Class 2A (Medium fit)
- 2G
- custom
- 5 ONF
- 3G
- 4G
- 8G
- Class 1A (Loose fit)
- 6G
- Class 3A (Tight fit)
- 5 HF
Supplier of Galvanized Anchor Bolts in Variety of Sizes as Per ISO 10684 Standards
View Hot dip galvanized bolts Supplier in India who Provides Various Sizes

| Diameter D | M6.5 | M8 | M6.5 | M8 | M8 | M6.5 | M10 | M10 |
|---|---|---|---|---|---|---|---|---|
| Length | 55 | 80 | 75 | 60 | 100 | 100 | 100 | 75 |
| Std Pack | 100 | 50 | 100 | 50 | 50 | 100 | 50 | 50 |
Stockist of HDG Coated Screws in Phillips, Slotted and Six-Lobe Head Drive at Low Cost in Mumbai
To Know About Hot Dip Galvanized Fasteners Price Per Kg in India Please Contact Us Hot Dip Galvanized Fasteners Price List
Refer Hot Dipped Galvanized Hex Bolts Dimension Before Buying the Products
Find Hot Dip Galvanized Fasteners Supplier in India Who Provide Various Dimensions

| Nominal Size | or Basic | Product | Diameter | inch | 5⁄16 | 3⁄8 | 7⁄16 | 1⁄4 | 1⁄2 | 3⁄4 | 7⁄8 | 5⁄8 | 1 | 1 3⁄8 | 1 1⁄8 | 1 1⁄2 | 1 1⁄4 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 0.3125 | 0.375 | 0.4375 | 0.25 | 0.5 | 0.75 | 0.875 | 0.625 | 1 | 1.375 | 1.125 | 1.5 | 1.25 | |||||
| Full-Size Body | Diameter, | E | Max | 0.324 | 0.388 | 0.452 | 0.26 | 0.515 | 0.768 | 0.895 | 0.642 | 1.022 | 1.404 | 1.149 | 1.531 | 1.277 | ||
| Min | 0.298 | 0.36 | 0.421 | 0.237 | 0.482 | 0.729 | 0.852 | 0.605 | 0.976 | 1.345 | 1.098 | 1.47 | 1.223 | |||||
| Width Across Flats, | F | Basic | inch | 1⁄2 | 9⁄16 | 5⁄8 | 7⁄16 | 3⁄4 | 11⁄8 | 1 5⁄16 | 15⁄16 | 1 1⁄2 | 2 1⁄16 | 1 11⁄16 | 2 1⁄4 | 1 7⁄8 | ||
| Max | 0.5 | 0.562 | 0.625 | 0.438 | 0.75 | 1.125 | 1.312 | 0.938 | 1.5 | 2.062 | 1.688 | 2.25 | 1.875 | |||||
| Min | 0.484 | 0.544 | 0.603 | 0.425 | 0.725 | 1.088 | 1.269 | 0.906 | 1.45 | 1.994 | 1.631 | 2.175 | 1.812 | |||||
| Width Across | Corners, G | Max | 0.577 | 0.65 | 0.722 | 0.505 | 0.866 | 1.299 | 1.516 | 1.083 | 1.732 | 2.382 | 1.949 | 2.598 | 2.165 | |||
| Min | 0.552 | 0.62 | 0.687 | 0.484 | 0.826 | 1.24 | 1.447 | 1.033 | 1.653 | 2.273 | 1.859 | 2.48 | 2.066 | |||||
| Head Height, H Basic | Basic | inch | 7⁄32 | 1⁄4 | 19⁄64 | 11⁄64 | 11⁄32 | 1⁄2 | 37⁄64 | 27⁄64 | 43⁄64 | 29⁄32 | 3⁄4 | 1 | 27⁄32 | |||
| Max | 0.235 | 0.268 | 0.316 | 0.188 | 0.364 | 0.524 | 0.604 | 0.444 | 0.7 | 0.94 | 0.78 | 1.036 | 0.876 | |||||
| Min | 0.195 | 0.226 | 0.272 | 0.15 | 0.302 | 0.455 | 0.531 | 0.378 | 0.591 | 0.81 | 0.658 | 0.902 | 0.749 | |||||
| Radius of | Fillet, R | Max | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.06 | 0.06 | 0.06 | 0.09 | 0.09 | 0.09 | 0.09 | 0.09 | |||
| Min | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.02 | 0.02 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | |||||
| Nominal Thread | Length for Bolt | Lengths, | LT | 6 in. and | Shoter | 0.875 | 1 | 1.125 | 0.75 | 1.25 | 1.75 | 2 | 1.5 | 2.25 | 3 | 2.5 | 3.25 | 2.75 |
| Over | 6 in. | 1.125 | 1.25 | 1.375 | 1 | 1.5 | 2 | 2.25 | 1.75 | 2.5 | 3.25 | 2.75 | 3.5 | 3 | ||||
| Nominal Size | or Basic | Product | Diameter | inch | 1 3⁄4 | 1 7⁄8 | 2 | 1 5⁄8 | 2 1⁄4 | 2 3⁄4 | 3 | 2 1⁄2 | 3 1⁄4 | 3 3⁄4 | 3 1⁄2 | 4 | ||
| mm | 1.75 | 1.875 | 2 | 1.625 | 2.25 | 2.75 | 3 | 2.5 | 3.25 | 3.75 | 3.5 | 4 | ||||||
| Full-Size Body | Diameter, | E | Max | 1.785 | 1.912 | 2.039 | 1.658 | 2.305 | 2.827 | 3.081 | 2.559 | 3.335 | 3.858 | 3.589 | 4.111 | |||
| Min | 1.716 | 1.839 | 1.964 | 1.591 | 2.214 | 2.711 | 2.961 | 2.461 | 3.21 | 3.726 | 3.461 | 3.975 | ||||||
| Width Across Flats, | F | Basic | inch | 2 5⁄8 | 2 13⁄16 | 3 | 2 7⁄16 | 3 3⁄8 | 4 1⁄8 | 4 1⁄2 | 3 3⁄4 | 4 7⁄8 | 5 5⁄8 | 5 1⁄4 | 6 | |||
| Max | 2.625 | 2.812 | 3 | 2.438 | 3.375 | 4.125 | 4.5 | 3.75 | 4.875 | 5.625 | 5.25 | 6 | ||||||
| Min | 2.538 | 2.719 | 2.9 | 2.356 | 3.262 | 3.988 | 4.35 | 3.625 | 4.712 | 5.437 | 5.075 | 5.8 | ||||||
| Width Across | Corners, G | Max | 3.031 | 3.248 | 3.464 | 2.815 | 3.897 | 4.763 | 5.196 | 4.33 | 5.629 | 6.495 | 6.062 | 6.928 | ||||
| Min | 2.893 | 3.099 | 3.306 | 2.616 | 3.719 | 4.546 | 4.959 | 4.133 | 5.372 | 6.198 | 5.786 | 6.612 | ||||||
| Head Height, H Basic | Basic | inch | 1 5⁄32 | 1 1⁄4 | 1 11⁄32 | 1 3⁄32 | 1 1⁄2 | 1 13⁄16 | 2 | 1 21⁄32 | 2 3⁄16 | 2 1⁄2 | 2 5⁄16 | 2 11⁄16 | ||||
| Max | 1.196 | 1.276 | 1.388 | 1.116 | 1.548 | 1.869 | 2.06 | 1.708 | 2.251 | 2.572 | 2.38 | 2.764 | ||||||
| Min | 1.054 | 1.13 | 1.175 | 0.978 | 1.327 | 1.632 | 1.815 | 1.479 | 1.936 | 2.241 | 2.057 | 2.424 | ||||||
| Radius of | Fillet, R | Max | 0.12 | 0.12 | 0.12 | 0.09 | 0.19 | 0.19 | 0.19 | 0.19 | 0.19 | 0.19 | 0.19 | 0.19 | ||||
| Min | 0.04 | 0.04 | 0.04 | 0.03 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | ||||||
| Nominal Thread | Length for Bolt | Lengths, | LT | 6 in. and | Shoter | 3.75 | 4 | 4.25 | 3.5 | 4.75 | 5.75 | 6.25 | 5.25 | 6.75 | 7.75 | 7.25 | 8.25 | |
| Over | 6 in. | 4 | 4.25 | 4.5 | 3.75 | 5 | 6 | 6.5 | 5.5 | 7 | 8 | 7.5 | 8.5 | |||||

| Nominal Size | Diameter, D | inch | 01/4 | 038/ | 5/16 | 7/16 | 9/16 | 01/2 | 058/ | 078/ | 03/4 | 1 | 1 3/8 | 1 1/8 | 1 1/4 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tap End Full | Thread Length, | BM | Nominal | 0.375 | 0.563 | 0.469 | 0.656 | 0.844 | 0.75 | 0.938 | 1.313 | 1.1.25 | 1.5 | 2.063 | 1.688 | 1.875 | |
| Min. | 0.35 | 0.532 | 0.44 | 0.62 | 0.802 | 0.708 | 0.892 | 1.258 | 1.075 | 1.438 | 2 | 1.625 | 1.813 | ||||
| Max. | 0.4 | 0.594 | 0.498 | 0.692 | 0.896 | 0.792 | 0.983 | 1.368 | 1.175 | 1.562 | 2.125 | 1.75 | 1.938 | ||||
| Umax = 2P | UNC & NC-5 | Thread | 0.1 | 0.125 | 0.111 | 0.143 | 0.167 | 0.154 | 0.182 | 0.222 | 0.2 | 0.25 | 0.333 | 0.286 | 0.286 | ||
| UNF Thread | 0.071 | 0.083 | 0.083 | 0.1 | 0.111 | 0.1 | 0.111 | 0.143 | 0.125 | 0.167 | 0.167 | 0.167 | 0.167 | ||||
| 8UN Thread | … | — | — | — | — | — | — | — | — | — | 0.25 | 0.25 | 0.25 | ||||
| Minimum Nut End | Full Thread Length, | Bmin | L ≤ 10 | 0.75 | 1 | 0.875 | 1.125 | 1.375 | 1.25 | 1.5 | 2 | 1.75 | 2.25 | 3 | 2.5 | 2.75 | |
| 10 | 1 | 1.25 | 1.125 | 1.375 | 1.625 | 1.5 | 1.75 | 2.25 | 2 | 2.5 | 3.25 | 2.75 | 3 | ||||
| L > 16 | 1.5 | 1.75 | 1.625 | 1.875 | 2.125 | 2 | 2.25 | 2.75 | 2.5 | 3 | 3.75 | 3.25 | 3.5 | ||||
| Nominal Size | Diameter, D | inch | 1 1/2 | 1 3/4 | 1 5/8 | 1 7/8 | 2 1/4 | 2 | 2 1/2 | 3 | 2 3/4 | 3 1/4 | 3 3/4 | 3 1/2 | 4 | ||
| Tap End Full | Thread Length, | BM | Nominal | 2.25 | 2.625 | 2.438 | 2.813 | 3.375 | 3 | 3.75 | 4.5 | 4.125 | 4.875 | 5.625 | 5.25 | 6 | |
| Min. | 2.188 | 2.563 | 2.375 | 2.75 | 3.3 | 2.925 | 3.675 | 4.425 | 4.05 | 4.775 | 5.525 | 5.15 | 5.9 | ||||
| Max. | 2.313 | 2.688 | 2.5 | 2.875 | 3.45 | 3.075 | 3.825 | 4.575 | 4.2 | 4.975 | 5.725 | 5.35 | 6.1 | ||||
| Umax = 2P | UNC & NC-5 | Thread | 0.333 | 0.4 | — | — | 0.444 | 0.444 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | ||
| UNF Thread | 0.167 | — | — | — | — | — | — | — | — | — | — | — | — | ||||
| 8UN Thread | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | ||||
| Minimum Nut End | Full Thread Length, | Bmin | L ≤ 10 | 3.25 | 3.75 | 3.5 | 4 | 4.75 | 4.25 | 5.25 | — | 5.75 | — | — | — | — | |
| 10 | 3.5 | 4 | 3.75 | 4.25 | 5 | 4.5 | 5.5 | 6.5 | 6 | 7 | 8 | 7.5 | 8.5 | ||||
| L > 16 | 4 | 4.5 | 4.25 | 4.75 | 5.5 | 5 | 6 | 7 | 6.5 | 7.5 | 8.5 | 8 | 9 | ||||

| Nominal Size | I.D. | [Note (1)] | 16 | 12 | 20 | 24 | 27 | 22 | 30 | 42 |
|---|---|---|---|---|---|---|---|---|---|---|
| T | Max. | 18.4 | 14.4 | 22.5 | 26.5 | 30.5 | 24.5 | 33.6 | 45.6 | |
| O.D. | Min. | 18 | 14 | 22 | 26 | 30 | 24 | 33 | 45 | |
| Max. | 34 | 27 | 42 | 50 | 56 | 44 | 60 | 84 | ||
| Standard | Min. | 32.4 | 25.7 | 40.4 | 48.4 | S4.1 | 42.4 | 58.1 | 81.8 | |
| Extra Thick | Max. | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 7.2 | |
| Clipped Width E, Min. | Min. | 3.1 | 3.1 | 3.1 | 3.4 | 3.4 | 3.4 | 3.4 | 4.6 | |
| Max. | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | ||
| Min. | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
| [Note (2)] | 14 | 10.5 | 17.5 | 21 | 23.6 | 19.2 | 26.2 | 36.7 | ||
| Nominal Size | I.D. | [Note (1)] | 48 | 36 | 56 | 72 | 80 | 64 | 90 | 100 |
| T | Max. | 52.7 | 39.6 | 62.7 | 78.7 | 86.9 | 70.7 | 96.9 | 107.9 | |
| O.D. | Min. | 52 | 39 | 62 | 78 | 86 | 70 | 96 | 107 | |
| Max. | 95 | 72 | 107 | 130 | 142 | 118 | 159 | 176 | ||
| Standard | Min. | 92.8 | 70.1 | 104.8 | 127.5 | 139.5 | 115.8 | 156.5 | 173.5 | |
| Extra Thick | Max. | 7.2 | 4.6 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | |
| Clipped Width E, Min. | Min. | 4.6 | 3.4 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |
| Max. | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | ||
| Min. | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
| [Note (2)] | 42 | 31.S | 49 | 63 | 70 | 56 | 78.7 | 87.5 |
Check Galvanized Carriage Bolts Tensile Strength and Application
| 120 ksi | Diameter | 1-1/8″ | 1/2″ | 1-1/4″ | 7/8″ | Above values based on |
| Tensile min lbf | 91,600 | 17,050 | 1,16,300 | 55,450 | 120,000psi | |
| Stress Area in ² | 0.763 | 0.142 | 0.969 | 0.462 | ||
| 150 ksi | Proof Load min lbf | 70,250 | 13,050 | 89,200 | 42,500 | 92,000psi |
| Proof Load min lbf | 64,900 | 12,050 | 82,400 | 39,250 | 85,000psi | |
| Proof Load min | 99,200 | 18,500 | 1,26,000 | 60,100 | 130,000psi | |
| Tensile max lbf | 1,32,000 | 24,600 | 1,67,650 | 79,950 | 173,000psi | |
| Tensile min lbf | 1,14,450 | 21,300 | 1,45,350 | 69,300 | 150,000psi | |
| Proof Load min lbf | 91,600 | 17,050 | 1,16,300 | 55,450 | 120,000psi | |
| 120 ksi – A325 (Hex) & F1852 (Twist-Off) | Diameter | 5/8″ | 3/4″ | 1″ | 1-1/2″ | 1-3/8″ |
| Tensile min lbf | 27,100 | 40,100 | 72,700 | 1,68,600 | 1,38,600 | |
| Stress Area in ² | 0.226 | 0.334 | 0.606 | 1.105 | 1.155 | |
| 150 ksi – A490 (Hex) & F2280 (Twist-Off) | Proof Load min lbf | 20,800 | 30,700 | 55,700 | 1,29,300 | 1,06,300 |
| Proof Load min lbf | 19,200 | 28,400 | 51,500 | 1,19,500 | 98,200 | |
| Proof Load min | 29,400 | 43,400 | 78,800 | 1,82,600 | 1,50,200 | |
| Tensile max lbf | 39,100 | 57,800 | 1,04,850 | 2,43,100 | 1,99,850 | |
| Tensile min lbf | 33,900 | 50,100 | 90,900 | 2,10,750 | 1,73,250 | |
| Proof Load min lbf | 27,100 | 40,100 | 72,700 | 1,68,600 | 1,38,600 |
Find Hot dip galvanized bolts Manufacturer in India Provides High Quality Products To Various Industries
- Oil & Gas
- Chemical Process
- Heavy Machinery & Industrial Projects
- Power & Energy
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Galvanized Anchor Bolts

HDG Washers

Hot Dipped Galvanized Carriage Bolts

Galvanized Heavy Hex Nuts

HDG Threaded Rod
| Galvanized Bolt Size | NSm | LbfSft |
|---|---|---|
| 3/8 – 16 | 25.9 | 19.1 |
| 5/16 – 18 | 14.5 | 10.7 |
| 1/2 – 13 | 63.7 | 47 |
| 7/16 – 14 | 42.0 | 31 |
| 1/4 – 20 | 7.19 | 5.3 |
| 5/8 – 11 | 114 | 84 |
| 9/16 – 12 | 86.8 | 64 |
| 7/8 – 9 | 301 | 222 |
| 3/4 – 10 | 183 | 135 |
| Harsh Environments | Ordinary Environment |
|---|---|
| 200μm | 35μm |
| Hot Dip Galvanized Bolt Lengths Thru 6″ | Bolt Lengths Over 6″ | Bolt Diameter |
|---|---|---|
| -0.19 | -0.25 | 7/8″ |
| -0.12 | -0.19 | 1/2″ |
| -0.19 | -0.25 | 3/4″ |
| -0.12 | -0.25 | 5/8″ |
| -0.25 | -0.25 | 1-3/8″ |
| -0.25 | -0.25 | 1-1/8″ |
| -0.25 | -0.25 | 1-1/2″ |
| -0.25 | -0.25 | 1-1/4″ |
| -0.19 | -0.25 | 1″ |
| Turkey | UAE | Australia | Saudi Arabia | Qatar |
| Brazil | Italy | Germany | Ireland | Denmark |
| South Africa | Canada | USA | UK | Spain |
| Singapore | Nigeria | Poland | Netherlands | Mexico |
- Vision Alloys is A Manufacturer of Steel Fasteners Company in India
- Dealers and Distributors of Bolting Products in USA, Europe, New Zealand, Algeria, United Kingdom, Morocco, South Africa and Australia, Egypt, Peru, chile, Jordan, Argentina
- Manufacturer and Supplier of Stainless Steel, Nickel Alloy, Titanium, Copper Materials in Mumbai.
- Stockist and Trader of Top Quality High Temperature Alloys for Oil and Gas Industry and Standard & Custom Sizes in EX Stock

