Navigate the full fasteners reference below.
Hardware (Nuts, Bolts, Fasteners) are fundamental components for mechanical assembly and structural connections in industrial, construction and engineering applications. Kennkrupps supplies high-quality fasteners for oil & gas, petrochemical, power generation, construction and manufacturing industries.
Manufactured as per ASTM A193, A194, A320, A325, A307, A490, ASME B18.2.1, B18.2.2, ISO 4014, 4017, 4032, 4033 in carbon steel, alloy steel, stainless steel and special alloys.
Industrial fasteners are hardware devices that mechanically join or affix two or more objects together — including bolts, nuts, screws, washers, studs and threaded rods used in piping, structural steel, machinery and equipment assembly.
Fasteners are critical for flange connections, pressure vessels, structural steelwork, machinery assembly and general industrial applications where joint integrity, grade selection and tightening torque determine safety and reliability.
Bolts, nuts, washers, studs and rods for every joint.
General assembly, structural, flanges.
Structural steel, high-load applications.
Flange connections, pressure vessels.
Machinery, precision assembly.
Structural foundations, equipment mounting.
Pipe clamps, tube support.
Lifting and rigging points.
General assembly, structural.
Structural steel, high-load joints.
Vibration-resistant applications.
Automotive, machinery.
Quick assembly, low torque.
Decorative and safety closures.
Wood construction, rails.
Load distribution, surface protection.
Vibration resistance, tension.
Vibration resistance.
Hanging, suspension, general.
Flange connections, machinery.
Electrical insulation.
Metric (ISO 4014) and imperial (ASME B18.2.1) dimensions.
| Thread (d) | Pitch (P) | Head Width (s) | Head Height (k) | Washer Face (dw) | Shank L ≤ 125mm (b) | Weight M10×50 / 100 |
|---|---|---|---|---|---|---|
| M6 | 1.0 | 10 mm | 4.0 mm | 8.6 mm | 18 mm | 0.55 kg |
| M8 | 1.25 | 13 mm | 5.3 mm | 11.5 mm | 22 mm | 1.05 kg |
| M10 | 1.5 | 16 mm | 6.4 mm | 14.4 mm | 26 mm | 1.70 kg |
| M12 | 1.75 | 18 mm | 7.5 mm | 16.3 mm | 30 mm | 2.50 kg |
| M14 | 2.0 | 21 mm | 8.8 mm | 19.2 mm | 34 mm | 3.55 kg |
| M16 | 2.0 | 24 mm | 10.0 mm | 22.0 mm | 38 mm | 4.75 kg |
| M18 | 2.5 | 27 mm | 11.5 mm | 24.7 mm | 42 mm | 6.35 kg |
| M20 | 2.5 | 30 mm | 12.5 mm | 27.7 mm | 46 mm | 8.10 kg |
| M22 | 2.5 | 34 mm | 14.0 mm | 31.4 mm | 50 mm | 10.25 kg |
| M24 | 3.0 | 36 mm | 15.0 mm | 33.3 mm | 54 mm | 12.50 kg |
| M27 | 3.0 | 41 mm | 17.0 mm | 38.0 mm | 60 mm | 17.50 kg |
| M30 | 3.5 | 46 mm | 18.7 mm | 42.8 mm | 66 mm | 23.00 kg |
| M33 | 3.5 | 50 mm | 21.0 mm | 46.6 mm | 72 mm | 29.50 kg |
| M36 | 4.0 | 55 mm | 22.5 mm | 51.1 mm | 78 mm | 37.50 kg |
| M39 | 4.0 | 60 mm | 25.0 mm | 55.4 mm | 84 mm | 47.00 kg |
| M42 | 4.5 | 65 mm | 26.0 mm | 59.9 mm | 90 mm | 57.50 kg |
| M45 | 4.5 | 70 mm | 28.0 mm | 64.5 mm | 96 mm | 69.50 kg |
| M48 | 5.0 | 75 mm | 30.0 mm | 69.4 mm | 102 mm | 83.50 kg |
| M52 | 5.0 | 80 mm | 33.0 mm | 74.5 mm | 110 mm | 105.00 kg |
| M56 | 5.5 | 85 mm | 35.0 mm | 79.5 mm | 118 mm | 128.50 kg |
| M60 | 5.5 | 90 mm | 38.0 mm | 84.7 mm | 126 mm | 155.00 kg |
| M64 | 6.0 | 95 mm | 40.0 mm | 89.8 mm | 134 mm | 185.00 kg |
| M68 | 6.0 | 100 mm | 43.0 mm | 95.0 mm | 142 mm | 220.00 kg |
| M72 | 6.0 | 105 mm | 45.0 mm | 100.2 mm | 150 mm | 258.00 kg |
| M76 | 6.0 | 110 mm | 48.0 mm | 105.3 mm | 158 mm | 300.00 kg |
| M80 | 6.0 | 115 mm | 50.0 mm | 110.5 mm | 166 mm | 345.00 kg |
| M85 | 6.0 | 120 mm | 53.0 mm | 115.6 mm | 176 mm | 400.00 kg |
| M90 | 6.0 | 130 mm | 56.0 mm | 125.8 mm | 186 mm | 465.00 kg |
| M95 | 6.0 | 140 mm | 59.0 mm | 136.0 mm | 196 mm | 535.00 kg |
| M100 | 6.0 | 150 mm | 62.0 mm | 146.2 mm | 206 mm | 615.00 kg |
| Size (Inch) | TPI | Head Width | Head Height | Washer Face | Shank L ≤ 6" | Weight ½"×3" / 100 |
|---|---|---|---|---|---|---|
| 1/4" | 20 | 7/16" | 17/64" | 0.389" | 0.75" | 1.25 lbs |
| 5/16" | 18 | 1/2" | 11/32" | 0.482" | 0.88" | 2.05 lbs |
| 3/8" | 16 | 9/16" | 15/32" | 0.575" | 1.00" | 3.10 lbs |
| 7/16" | 14 | 5/8" | 17/32" | 0.668" | 1.12" | 4.45 lbs |
| 1/2" | 13 | 3/4" | 19/32" | 0.761" | 1.25" | 6.20 lbs |
| 5/8" | 11 | 15/16" | 23/32" | 0.954" | 1.50" | 10.50 lbs |
| 3/4" | 10 | 1-1/8" | 27/32" | 1.147" | 1.75" | 16.25 lbs |
| 7/8" | 9 | 1-5/16" | 31/32" | 1.340" | 2.00" | 23.50 lbs |
| 1" | 8 | 1-1/2" | 1-1/16" | 1.533" | 2.25" | 32.80 lbs |
| 1-1/8" | 7 | 1-11/16" | 1-3/16" | 1.726" | 2.50" | 43.50 lbs |
| 1-1/4" | 7 | 1-7/8" | 1-1/4" | 1.919" | 2.75" | 56.00 lbs |
| 1-3/8" | 6 | 2" | 1-7/16" | 2.112" | 3.00" | 70.50 lbs |
| 1-1/2" | 6 | 2-1/4" | 1-1/2" | 2.305" | 3.25" | 87.00 lbs |
| 1-3/4" | 5 | 2-5/8" | 1-3/4" | 2.691" | 3.75" | 125.00 lbs |
| 2" | 4.5 | 3" | 2" | 3.077" | 4.25" | 170.00 lbs |
| 2-1/4" | 4.5 | 3-3/8" | 2-1/4" | 3.463" | 4.75" | 220.00 lbs |
| 2-1/2" | 4 | 3-3/4" | 2-1/2" | 3.849" | 5.25" | 280.00 lbs |
| 2-3/4" | 4 | 4-1/8" | 2-3/4" | 4.235" | 5.75" | 345.00 lbs |
| 3" | 4 | 4-1/2" | 3" | 4.621" | 6.25" | 420.00 lbs |
| 3-1/4" | 4 | 4-7/8" | 3-1/4" | 5.007" | 6.75" | 500.00 lbs |
| 3-1/2" | 4 | 5-1/4" | 3-1/2" | 5.393" | 7.25" | 590.00 lbs |
| 4" | 4 | 6" | 4" | 6.165" | 8.25" | 800.00 lbs |
| Parameter | Specification |
|---|---|
| Size Range | M6 to M100, 1/4" to 4" |
| Length Range | 50mm to 3000mm, 2" to 120" |
| End Types | Full threaded, half threaded, double-end studs |
| Thread Standard | ISO metric, UNC, UN8, BSW, BSF |
| Materials | ASTM A193 B7, B7M, B16, B8, B8M, A320 L7, L7M |
| Standards | ASTM A193, A194, A320, ASME B16.5 |
| Applications | Flange connections, pressure vessels, heat exchangers |
Carbon steel, alloy steel, stainless steel and nut grades.
| Grade | Specification | Tensile | Yield | Applications | Temperature |
|---|---|---|---|---|---|
| Grade 2 | ASTM A307 | 410-550 MPa | 250 MPa | General purpose, low strength | -29°C to 425°C |
| Grade 5 | ASTM A449 | 825-1030 MPa | 585 MPa | Structural, machinery | -29°C to 425°C |
| Grade 8 | ASTM A490 | 1030-1225 MPa | 900 MPa | High-strength structural | -29°C to 425°C |
| A325 Type 1 | ASTM A325 | 825-1030 MPa | 585 MPa | Structural steel (heavy hex) | -29°C to 425°C |
| A490 Type 1 | ASTM A490 | 1030-1225 MPa | 900 MPa | High-strength structural | -29°C to 425°C |
| Grade | Specification | Tensile | Yield | Applications | Temperature |
|---|---|---|---|---|---|
| B7 | ASTM A193 | 860 MPa min | 690 MPa min | High-temperature, pressure vessels | -29°C to 450°C |
| B7M | ASTM A193 | 690 MPa min | 550 MPa min | Sour service, NACE | -29°C to 450°C |
| B16 | ASTM A193 | 860 MPa min | 720 MPa min | High-temperature, high-pressure | -29°C to 550°C |
| L7 | ASTM A320 | 860 MPa min | 690 MPa min | Low-temperature service | -73°C to 450°C |
| L7M | ASTM A320 | 690 MPa min | 550 MPa min | Low-temperature, sour service | -73°C to 450°C |
| L43 | ASTM A320 | 965 MPa min | 825 MPa min | Low-temperature, high-strength | -73°C to 450°C |
| Grade | Specification | Tensile | Yield | Applications | Temperature |
|---|---|---|---|---|---|
| B8 (304) | ASTM A193 | 515 MPa min | 205 MPa min | General corrosion resistance | -196°C to 800°C |
| B8C (347) | ASTM A193 | 515 MPa min | 205 MPa min | Stabilized, high-temperature | -196°C to 800°C |
| B8M (316) | ASTM A193 | 515 MPa min | 205 MPa min | Marine, chemical, high corrosion | -196°C to 800°C |
| B8T (321) | ASTM A193 | 515 MPa min | 205 MPa min | Stabilized, welded | -196°C to 800°C |
| B8 Class 2 | ASTM A193 | 690 MPa min | 550 MPa min | Strain hardened, higher strength | -196°C to 800°C |
| B8M Class 2 | ASTM A193 | 750 MPa min | 585 MPa min | Strain hardened, marine | -196°C to 800°C |
| F593 (304) | ASTM A193 | 690-1030 MPa | 450-825 MPa | Stainless steel bolts | -196°C to 800°C |
| F593 (316) | ASTM A193 | 690-1030 MPa | 450-825 MPa | Stainless steel bolts, marine | -196°C to 800°C |
| Grade | Specification | Material | Hardness | Applications | Temperature |
|---|---|---|---|---|---|
| 2H | ASTM A194 | Carbon Steel | 248-327 HB | General purpose, high strength | -29°C to 425°C |
| 2 | ASTM A194 | Carbon Steel | 248-327 HB | General purpose | -29°C to 425°C |
| 2HM | ASTM A194 | Carbon Steel | 248-327 HB | Sour service, NACE | -29°C to 425°C |
| 7 | ASTM A194 | Alloy Steel | 248-327 HB | High-temperature, high-pressure | -29°C to 550°C |
| 7M | ASTM A194 | Alloy Steel | 248-327 HB | Sour service, high-temperature | -29°C to 550°C |
| 8 | ASTM A194 | 304 SS | 126-235 HB | Corrosion resistance | -196°C to 800°C |
| 8M | ASTM A194 | 316 SS | 126-235 HB | Marine, chemical | -196°C to 800°C |
| 8C | ASTM A194 | 347 SS | 126-235 HB | Stabilized, high-temperature | -196°C to 800°C |
| 8T | ASTM A194 | 321 SS | 126-235 HB | Stabilized, welded | -196°C to 800°C |
| 4 | ASTM A194 | Alloy Steel | 248-327 HB | High-temperature | -29°C to 550°C |
| 16 | ASTM A194 | Alloy Steel | 248-327 HB | High-temperature, high-pressure | -29°C to 600°C |
Match the coating to the environment and temperature.
| Coating Type | Thickness | Applications | Corrosion Resistance | Temperature Limit |
|---|---|---|---|---|
| Plain (Uncoated) | N/A | Indoor, dry environments | Low | 425°C |
| Zinc Plated (Electroplated) | 5-15 μm | General purpose, indoor/outdoor | Medium | 200°C |
| Hot-Dip Galvanized (HDG) | 45-85 μm | Outdoor, marine, corrosive | High | 200°C |
| PTFE Coated (Xylan, Teflon) | 20-30 μm | Chemical, marine, high corrosion | Very High | 260°C |
| Cadmium Plated | 5-15 μm | Aerospace, marine | High | 250°C |
| Phosphate Coated | 5-10 μm | General purpose, oil retention | Low-Medium | 200°C |
| Black Oxide | 1-2 μm | General purpose, appearance | Low | 200°C |
| Nickel Plated | 5-25 μm | Chemical, marine, appearance | High | 400°C |
| Chrome Plated | 5-25 μm | Decorative, wear resistance | Medium | 400°C |
| Dacromet | 5-10 μm | Automotive, high corrosion | High | 300°C |
| Geomet | 5-10 μm | Automotive, environmental | High | 300°C |
Oil refineries and petrochemical plants, natural gas transmission, power generation, pipeline flange connections, pressure vessels and heat exchangers.
Structural steel construction, machinery and equipment assembly, marine and offshore platforms, automotive and transportation, mining.
Chemical and pharmaceutical processing, water and wastewater treatment, aerospace and defense, food and beverage processing.
Certified manufacturing management system for consistent process control and traceability.
PED 2014/68/EU and NACE MR0175 / MR0103 sour-service compliance on request.
Mill Test Certificates EN 10204 3.1/3.2 with every shipment. Third-party inspection available.
Hardness (Rockwell, Brinell, Vickers), tensile, Charpy impact and chemical analysis.
Coating thickness, salt spray (ASTM B117) and hydrogen embrittlement testing.
Full dimensional inspection on gauge-critical threads and head geometry.
Complete range of bolts, nuts, washers, studs and threaded rods.
Carbon steel, alloy steel, stainless steel, duplex, nickel, brass, bronze.
Grade 2, 5, 8, A325, A490, B7, B7M, B8, B8M, L7, L7M.
M6 to M100, ¼" to 4", lengths up to 3000mm.
100% inspection, MTC with every shipment.
Ready stock for common sizes and grades.
Made to drawing/specifications.
Direct from manufacturer.
Expert guidance on material selection and specifications.
Zinc plated, HDG, PTFE, cadmium, phosphate, black oxide.
ASTM, ASME, ISO, DIN, BS, NACE.
Our team can help with grade selection, dimensions, coating, tightening requirements and custom manufacturing.