Alloy Steel
Heat treated bolting for high pressure flanged joints.
Product Overview
Fasteners Stockist and Supplier
We are a large stockholder of bolts, nuts, fine fasteners and spares, foundation fasteners, washers, socket screws and other industrial fasteners.
Our range supports flanged piping joints, structural connections, plant maintenance and equipment foundations for contractors and manufacturers.
- Bolts, nuts, washers and stud bolts
- Eye bolts, threaded rods and cotter pins
- Anchor and foundation fasteners
- Fine fasteners and spares
RangeBolts, Nuts, Studs
FoundationAnchor & Foundation
PrecisionFine Fasteners & Spares
SupplyStock & Project Lots
Fasteners Specifications
- Types
- Bolts, Nuts, Washers, Anchor Fasteners, Stud Bolts, Eye Bolts, Studs, Threaded Rods, Cotter Pins, Socket Screws, Fine Fasteners and Spares, Foundation Fasteners
- Alloy Steel Studs and Bolts
- ASTM A193 Gr B7, B7M, B16
- Stainless Steel Studs and Bolts
- ASTM A193 Gr B8, B8M
- Low Temperature Bolting
- ASTM A320 Gr L7
- Nuts
- ASTM A194 Gr 2H, 8, 8M
- Carbon Steel
- ASTM A307, IS 1367 property classes
- Threads
- Metric (ISO), UNC, UN and 8UN
Fasteners Grades
Alloy Steel Bolting
- B7
- B7M
- B16
- L7
Stainless Steel Bolting
- B8
- B8M
- A2-70
- A4-80
Nuts
- 2H
- 8
- 8M
Carbon Steel
- A307 Gr B
- Class 4.6
- Class 8.8
- Class 10.9
- Class 12.9
Materials
Stainless Steel
Corrosion resistant fasteners for process and outdoor service.
Carbon Steel
General structural and machine fasteners.
Nickel Alloys
Special bolting for severe corrosive environments.
Brass and Copper Alloys
Non-sparking and marine fastener applications.
Chemical Composition
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| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | Others |
|---|---|---|---|---|---|---|---|---|---|
| Bolting, ASTM A193 and A320 | |||||||||
| B7 / L7 | 0.37 - 0.49 | 0.65 - 1.10 | 0.035 | 0.040 | 0.15 - 0.35 | 0.75 - 1.20 | - | 0.15 - 0.25 | - |
| B16 | 0.36 - 0.47 | 0.45 - 0.70 | 0.035 | 0.040 | 0.15 - 0.35 | 0.80 - 1.15 | - | 0.50 - 0.65 | V 0.25 - 0.35 |
| B8 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0 - 20.0 | 8.0 - 11.0 | - | - |
| B8M | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0 - 18.0 | 10.0 - 14.0 | 2.0 - 3.0 | - |
| Nuts, ASTM A194 | |||||||||
| 2H | 0.40 min | 1.00 | 0.040 | 0.050 | 0.40 | - | - | - | - |
Values are for reference, as per the relevant standard. Percentages are maximum unless a range or minimum is shown. Actual values are stated on the mill test certificate.
Mechanical Properties
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| Grade | Tensile (MPa, min) | Yield (MPa, min) | Elongation (%, min) | Reduction of Area (%, min) | Hardness |
|---|---|---|---|---|---|
| Bolting up to 2 1/2 in Diameter | |||||
| B7 | 860 | 720 | 16 | 50 | 35 HRC max |
| B7M | 690 | 550 | 18 | 50 | 22 HRC max |
| B16 | 860 | 725 | 18 | 50 | 35 HRC max |
| L7 | 860 | 725 | 16 | 50 | 35 HRC max |
| B8 Class 1 | 515 | 205 | 30 | 50 | 96 HRB max |
| B8M Class 1 | 515 | 205 | 30 | 50 | 96 HRB max |
Dimension Chart
Metric Hex Bolts and Nuts (mm), ISO 4014 and ISO 4032
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| Thread | Pitch | Across Flats | Bolt Head Height | Nut Height (max) |
|---|---|---|---|---|
| M6 | 1.00 | 10 | 4.0 | 5.2 |
| M8 | 1.25 | 13 | 5.3 | 6.8 |
| M10 | 1.50 | 16 | 6.4 | 8.4 |
| M12 | 1.75 | 18 | 7.5 | 10.8 |
| M16 | 2.00 | 24 | 10.0 | 14.8 |
| M20 | 2.50 | 30 | 12.5 | 18.0 |
| M24 | 3.00 | 36 | 15.0 | 21.5 |
| M30 | 3.50 | 46 | 18.7 | 25.6 |
| M36 | 4.00 | 55 | 22.5 | 31.0 |
Heavy Hex Nuts for Stud Bolts, ASME B18.2.2
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| Thread (in) | TPI | Across Flats (in) | Across Flats (mm) | Height (mm) |
|---|---|---|---|---|
| 1/2 | 13 | 7/8 | 22.2 | 12.3 |
| 5/8 | 11 | 1 1/16 | 27.0 | 15.5 |
| 3/4 | 10 | 1 1/4 | 31.8 | 18.7 |
| 7/8 | 9 | 1 7/16 | 36.5 | 21.8 |
| 1 | 8 | 1 5/8 | 41.3 | 25.0 |
| 1 1/8 | 8 | 1 13/16 | 46.0 | 28.2 |
| 1 1/4 | 8 | 2 | 50.8 | 31.0 |
| 1 1/2 | 8 | 2 3/8 | 60.3 | 37.3 |
Stud bolt diameters and lengths for each flange size follow ASME B16.5.
Applications
Oil & Gas
Flange bolting for process piping and pressure vessels.
Power Plants
High temperature bolting for turbines and boilers.
Infrastructure
Structural connections, anchors and foundation bolts.
Manufacturing
Machine assembly, fine fasteners and spares.
Chemical Processing
Corrosion resistant fasteners for chemical plants.
MEP & HVAC
Pipe supports, hangers and equipment mounting.
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