Table of Contents
CFIT Copper is a manufacturer and exporter of copper fasteners, copper gasket and copper washers for industrial, engineering, electrical, plumbing, automotive, HVAC and other applications. Copper Fixing and Sealing Parts are produced in various sizes, shapes and specifications to suit the requirements of assembly for various industrial applications.
We offer a variety of copper products like copper bolts, copper nuts, copper screws, copper studs, copper threaded rods, flat copper gaskets, copper sealing gaskets, copper washers, and other copper products. Copper is highly resistant to corrosion, very durable, and has excellent electrical and thermal conductivity and is reliable, ideal for cases where effective fixing, electrical conductivity and sealing properties are desired.
Copper Fasteners
Copper fasteners are applicable for fastening and joining parts that demand corrosion resistance, electrical conductivity and assured mechanical performance. CFIT Copper is a manufacturer and supplier of various Copper Fasteners for industrial and engineering uses. Our range of Copper fasteners can be produced in various sizes and shapes as per the application and customer needs.
Types of Copper Fasteners
Copper Bolts
Copper Nuts
Copper Screws
Copper Studs
Copper Threaded Rods
Copper Machine Screws
Copper Hex Bolts
Copper Hex Nuts
Copper fasteners are frequently applied to electrical equipment, switchgear, transformers, electrical panels, plumbing, HVAC equipment, machinery, industrial assemblies and any application requiring a Cu based fastening component.
Copper Gaskets
Copper gaskets are metal sealing parts that are used to create a tight seal between two surfaces. Copper is also malleable and thermally conductive, which enables copper gaskets to conform to mating surfaces to assist in effective sealing for appropriate applications.
CFIT Copper produces and supplies copper gasket in various geometry, size and thickness for industrial sealing applications. Copper gaskets can be provided in standard or custom sizes as required by the applications.
Types of Copper Gaskets
Copper Ring Gaskets
Copper Flat Gaskets
Copper Exhaust Gaskets
Copper gaskets are used in piping systems, automotive parts, engines, hydraulic devices, industrial machinery, heat transfer equipment, flanges and any other assembly where a copper sealing part is needed.
Copper Washers
Copper washers are commonly used in mechanical and industrial applications to hold parts in place, provide a seal, and act as a fastener. They have corrosion resisting properties, good malleability and are good conductors of electricity and heat, so they are applicable for situations where copper based washers are required.
CFIT Copper manufactures copper washers differing in outer diameter, inside diameter and thickness. Washer can be made in various kind of configurations based on the application requirements.
Types of Copper Washers
Copper Flat Washers
Copper Sealing Washers
Copper Spring Washers
Copper washers are used in bolts, nuts, screws, plugs, fittings, electrical connections, automotive, hydraulic assemblies, plumbing and industrial equipment.
Copper Fasteners, Gaskets & Washers Specifications
Copper fasteners, gaskets and washers may be provided in various sizes and dimensions as per product type and application. Product specifications may be: diameter, thickness, length, internal diameter, external diameter, thread configuration, shape and overall dimensions.
| Standard | IS, ANSI, ASTM DIN, ISO, JIS, GB, ASME, BS, UNI |
| Grade | C10200, C10300, C10800, C12000, C12200 |
| Size | M3 – M56 | 3/6″ to 2″ |
| Length | 3 mm to 200 mm |
| Bolts | ANSI B18.2.1, DIN 931/ 933 |
| Bolts Size Metric | Dia: M10 – M110 Length: 12 – 1200MM |
| Bolts Size Inch | Dia: 1/2″ – 4.0″ Length: 1/2″ – 52″ |
| Eye Bolts Metric Size | Dia: M10 – M48 |
| Nut (DIA) | Metric: M6 – M110 Inch: 1/4″ – 4.5″ |
| Plain Washer (DIA) | Metric: M6 – M110 Inch: 1/2″ – 4.1/2″ |
| Threads | BSF, UNF METRIC, UNC, UNEF, BSW |
| DIN German Standard Fasteners | DIN 933, DIN 931, DIN 970, DIN 934 |
| ISO Standard Fasteners | ISO 4033, : ISO 4032, JIS standards |
| ASME/ ANSI – American Standard Fasteners | ANSI B 28.2.4 1M, ANSI B 18.2.4 2M, ASME B18.5, ASME B18.2.2 |
| Fasteners Coating | Xylon Coated Fasteners, Phosphate Coated Fasteners, Hot Dipped Galvanizing Coated Fasteners, Teflon Coated Fasteners, Zinc Coated Fasteners, Ptfe Coated (Teflon) Fasteners, Cadmium Coated Fasteners |
Applications that need specific sizes, shapes, or configurations might consider customized dimensions.
Copper Hex Bolt Dimension
15mm (1/2″) Copper Fasteners Weight Chart
| NOMINAL SIZE (D) | BODY DIAMETER | HEAD THICKNEASTM A193 | ACROASTM A193 THE FLATS | ACROASTM A193 CORNERS | ||||
|---|---|---|---|---|---|---|---|---|
| D (MAX) | D (MIN) | H (MAX) | H (MIN) | F (MAX) | F (MIN) | C (MAX) | C (MIN) | |
| m10 | 10.00 | 9.78 | 6.63 | 6.17 | 17.00 | 15.73 | 18.48 | 17.77 |
| m12 | 12.00 | 11.73 | 7.76 | 4.24 | 19.00 | 17.73 | 20.78 | 20.03 |
| m14 | 14.00 | 13.73 | 9.09 | 8.51 | 22.00 | 20.67 | 24.25 | 23.35 |
| m16 | 16.00 | 15.73 | 10.32 | 9.68 | 24.00 | 23.67 | 27.71 | 26.75 |
| m20 | 20.00 | 19.67 | 12.88 | 12.12 | 30.00 | 29.16 | 34.64 | 32.95 |
| m24 | 24.00 | 23.67 | 15.44 | 14.56 | 36.00 | 35.00 | 41.57 | 39.55 |
| m30 | 30.00 | 29.67 | 19.48 | 17.92 | 46.00 | 45.00 | 53.12 | 50.85 |
| m36 | 36.00 | 35.61 | 23.38 | 21.63 | 55.00 | 53.80 | 63.51 | 60.79 |
| m42 | 42.00 | 41.38 | 26.97 | 25.03 | 65.00 | 62.90 | 75.06 | 71.71 |
| m48 | 48.00 | 47.38 | 31.07 | 28.93 | 75.00 | 72.60 | 86.60 | 82.76 |
| m56 | 56.00 | 55.26 | 36.2 | 33.80 | 85.00 | 82.20 | 98.15 | 93.71 |
| m64 | 64.00 | 63.26 | 41.32 | 38.68 | 95.00 | 91.80 | 109.70 | 104.65 |
| m72 | 72.00 | 71.26 | 46.45 | 43.55 | 105.00 | 101.40 | 121.24 | 115.60 |
| m80 | 80.00 | 79.26 | 51.58 | 48.42 | 115.00 | 111.00 | 132.72 | 126.54 |
| m90 | 90.00 | 89.13 | 57.74 | 54.26 | 130.00 | 125.50 | 150.11 | 143.07 |
| m100 | 90.00 | 99.13 | 63.9 | 60.10 | 145.00 | 140.00 | 167.43 | 159.60 |
Size Chart of Copper Nuts
| Nut Size (mm) | Diameter* (mm) | Height (mm) | ||
|---|---|---|---|---|
| Hex Nut | Jam Nut | Nylock Nut | ||
| 2mm | 4 | 1.6 | 1.2 | – |
| 2.5mm | 5 | 2 | 1.6 | – |
| 3mm | 5.5 | 2.4 | 1.8 | 4 |
| 4mm | 7 | 3.2 | 2.2 | 5 |
| 5mm | 8 | 4 | 2.7 | 5 |
| 6mm | 10 | 5 | 3.2 | 6 |
| 7mm | 11 | 5.5 | 3.5 | – |
| 8mm | 13 | 6.5 | 4 | 8 |
| 10mm | 17 | 8 | 5 | 10 |
| 12mm | 19 | 10 | 6 | 12 |
| 14mm | 22 | 11 | 7 | 14 |
| 16mm | 24 | 13 | 8 | 16 |
| 18mm | 27 | 15 | 9 | 18.5 |
| 20mm | 30 | 16 | 10 | 20 |
Dimensions of Copper Heavy Hex Nuts
| Nominal Size or Basic Major Thread Diameter | F | G | H | ||||||
| Width Across Flats | Width Across Corners | Thickness | |||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | ||
| 1/4 | .2500 | 1/2 | .500 | .488 | .577 | .556 | 15/64 | .250 | .218 |
| 5/16 | .3125 | 9/16 | .562 | .546 | .650 | .622 | 19/64 | .314 | .280 |
| 3/8 | .3750 | 11/16 | .688 | .669 | .794 | .763 | 23/64 | .377 | .341 |
| 7/16 | .4375 | 3/4 | .750 | .728 | .866 | .830 | 27/64 | .441 | .403 |
| 1/2 | .5000 | 7/8 | .875 | .850 | 1.010 | .969 | 31/64 | .504 | .464 |
| 9/16 | .5625 | 15/16 | .938 | .909 | 1.083 | 1.037 | 35/64 | .568 | .526 |
| 5/8 | .6250 | 1-1/16 | 1.062 | 1.031 | 1.227 | 1.175 | 39/64 | .631 | .587 |
| 3/4 | .7500 | 1-1/4 | 1.250 | 1.212 | 1.443 | 1.382 | 47/64 | .758 | .710 |
| 7/8 | .8750 | 1-7/16 | 1.438 | 1.394 | 1.660 | 1.589 | 55/64 | .885 | .833 |
| 1 | 1.0000 | 1-5/8 | 1.325 | 1.575 | 1.876 | 1.796 | 63/64 | 1.012 | .956 |
| 1-1/8 | 1.1250 | 1-13/16 | 1.812 | 1.756 | 2.093 | 2.002 | 1-7/64 | 1.139 | 1.079 |
| 1-1/4 | 1.2500 | 2 | 2.000 | 1.938 | 2.309 | 2.209 | 1-7/32 | 1.251 | 1.187 |
| 1-3/8 | 1.3750 | 2-3/16 | 2.188 | 2.119 | 2.526 | 2.416 | 1-11/32 | 1.378 | 1.460 |
| 1-1/2 | 1.5000 | 2-3/8 | 2.375 | 2.300 | 2.742 | 2.622 | 1-15/32 | 1.505 | 1.433 |
| 1-5/8 | 1.6250 | 2-9/16 | 2.562 | 2.481 | 2.959 | 2.828 | 1-19/32 | 1.632 | 1.556 |
| 1-3/4 | 1.7500 | 2-3/4 | 2.750 | 2.662 | 3.175 | 3.035 | 1-23/32 | 1.759 | 1.679 |
| 2 | 2.0000 | 3-1/8 | 3.125 | 3.025 | 3.608 | 3.449 | 1-31/32 | 2.013 | 1.925 |
| 2-1/4 | 2.2500 | 3-1/2 | 3.500 | 3.388 | 4.041 | 3.862 | 2-13/64 | 2.251 | 2.155 |
| 2-1/2 | 2.5000 | 3-7/8 | 3.875 | 3.750 | 4.474 | 4.275 | 2-29/64 | 2.505 | 2.401 |
| 2-3/4 | 2.7500 | 4-1/4 | 4.250 | 4.112 | 4.907 | 4.688 | 2-45/64 | 2.759 | 2.647 |
| 3 | 3.0000 | 4-5/8 | 4.625 | 4.475 | 5.340 | 5.102 | 2-61/64 | 3.013 | 2.893 |
| 3-1/4 | 3.2500 | 5 | 5.000 | 4.838 | 5.774 | 5.515 | 3-3/16 | 3.252 | 3.124 |
| 3-1/2 | 3.5000 | 5-3/8 | 5.375 | 5.200 | 6.207 | 5.928 | 3-7/16 | 3.506 | 3.370 |
| 3-3/4 | 3.7500 | 5-3/4 | 5.750 | 5.562 | 6.640 | 6.341 | 3-11/16 | 3.670 | 3.616 |
| 4 | 4.0000 | 6-1/8 | 6.125 | 5.925 | 7.073 | 6.755 | 3-15/16 | 4.014 | 3.862 |
Copper Hex Nuts Dimension
| Nominal Size or Basic Major Thread Diameter | F | G | H | ||||||
| Width Across Flats | Width Across Corners | Thickness | |||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | ||
| 1/4 | .2500 | 7/16 | .438 | .428 | .505 | .488 | 7/32 | .226 | .212 |
| 5/16 | .3125 | 1/2 | .500 | .489 | .577 | .557 | 17/64 | .273 | .258 |
| 3/8 | .3750 | 9/16 | .562 | .551 | .650 | .628 | 21/64 | .337 | .479 |
| 7/16 | .4375 | 11/16 | .688 | .675 | .794 | .768 | 3/8 | .385 | .365 |
| 1/2 | .5000 | 3/4 | .750 | .736 | .866 | .840 | 7/16 | .448 | .427 |
| 9/16 | .5625 | 7/8 | .875 | .861 | 1.010 | .982 | 31/64 | .496 | .473 |
| 5/8 | .6250 | 15/16 | .938 | .922 | 1.083 | 1.051 | 35/64 | .559 | .535 |
| 3/4 | .7500 | 1-1/8 | 1.125 | 1.088 | 1.299 | 1.240 | 41/64 | .665 | .617 |
| 7/8 | .8750 | 1-5/16 | 1.312 | 1.269 | 1.516 | 1.447 | 3/4 | .776 | .724 |
| 1 | 1.0000 | 1-1/2 | 1.500 | 1.450 | 1.732 | 1.653 | 55/64 | .887 | .831 |
| 1-1/8 | 1.1250 | 1-11/16 | 1.688 | 1.631 | 1.949 | 1.859 | 31/32 | .999 | .939 |
| 1-3/8 | 1.3750 | 2-1/16 | 2.062 | 1.994 | 2.382 | 2.273 | 1-11/64 | 1.206 | 1.138 |
| 1-1/2 | 1.500 | 2-1/4 | 2.250 | 2.175 | 2.598 | 2.480 | 1-9/32 | 1.28 | 1.245 |
| 1-5/8 | 1.6250 | 2-7/16 | 2.438 | 2.356 | 2.815 | 2.686 | 1-25/64 | 1.429 | 1.353 |
| 1-3/4 | 1.7500 | 2-5/8 | 2.625 | 2.538 | 3.031 | 2.893 | 1-1/2 | 1.540 | 1.460 |
| 2 | 2.0000 | 3 | 3.000 | 2.900 | 3.464 | 3.306 | 1-23/32 | 1.763 | 1.675 |
| 2-1/4 | 2.2500 | 3-3/8 | 3.375 | 3.263 | 3.897 | 3.719 | 1-15/16 | 1.986 | 1.890 |
| 2-1/2 | 2.5000 | 3-3/4 | 3.750 | 3.625 | 4.330 | 4.133 | 2-5/32 | 2.209 | 2.105 |
| 2-3/4 | 2.7500 | 4-1/8 | 4.125 | 3.988 | 4.763 | 4.546 | 2-3/8 | 2.431 | 2.319 |
Copper Sealing Washers
| Copper Washer Sizes | I.D mm | O.Dmm | Thickness in mm |
|---|---|---|---|
| Copper Washer 6mm x 10mm M6 Metric | 6.2 | 10 | 1 |
| Copper Washer 8mm x 11mm M8 Metric | 8.2 | 11.5 | 1 |
| Copper Washer 8mm x 14mm M8 Metric | 8.2 | 14 | 1 |
| Copper Washer 10mm x 13mm M10 Metric | 10.2 | 13.5 | 1 |
| Copper Washer 10mm x 16mm M10 Metric | 10.2 | 16 | 1 |
| Copper Washer 12mm x 15mm M12 Metric | 12.2 | 15.5 | 1.5 |
| Copper Washer 12mm x 17mm M12 Metric | 12.2 | 17 | 1.5 |
| Copper Washer 14mm x 18mm M14 Metric | 14.2 | 18 | 1.5 |
| Copper Washer 14mm x 20mm M14 Metric | 14.2 | 20 | 1.5 |
| Copper Washer 16mm x 20mm M16 Metric | 16.2 | 20 | 1.5 |
| Copper Washer 16mm x 22mm M16 Metric | 16.2 | 22 | 1.5 |
| Copper Washer 18mm x 22mm M18 Metric | 18.2 | 22 | 1.5 |
| Copper Washer 22mm x 27mm M22 Metric | 22.2 | 25.9 | 1.5 |
| Copper Washer 26mm x 31mm M26 Metric | 26.2 | 31 | 2 |
| Copper Washer 30mm x 36mm M30 Metric | 30.3 | 36 | 2 |
DIN 7603 Copper Sealing Washers Size Chart & Weight Table
| Size | SAE | USS | ||||
|---|---|---|---|---|---|---|
| Inside Diameter (A) | Outside Diameter (B) | Thickness (C) | Inside Diameter (A) | Outside Diameter (B) | Thickness (C) | |
| #12 | 1/4″ | 9/16″ | 0.065″ | – | – | – |
| #10 | 7/32″ | 1/2″ | 0.049″ | – | – | – |
| #4 | 1/8″ | 5/16″ | 0.032″ | – | – | – |
| #2 | 3/32″ | 1/4″ | 0.020″ | – | – | – |
| 1/2″ | 17/32″ | 1-1/16″ | 0.095″ | 9/16″ | 1-3/8″ | 0.109″ |
| 1-1/2″ | – | – | – | 1-5/8″ | 3-1/2″ | 0.180″ |
| 9/16″ | 19/32″ | 1-5/32″ | 0.095″ | 5/8″ | 1-15/32″ | 0.109″ |
| 1-3/8″ | – | – | – | 1-1/2″ | 3-1/4″ | 0.180″ |
| 1/4″ | 9/32″ | 5/8″ | 0.065″ | 5/16″ | 0.734″ | 0.065″ |
| 7/8″ | 15/16″ | 1-3/4″ | 0.134″ | 15/16″ | 2-1/4″ | 0.165″ |
| 1″ | 1-1/16″ | 2″ | 0.134″ | 1-1/16″ | 2-1/2″ | 0.165″ |
| 5/16″ | 11/32″ | 11/16″ | 0.065″ | 3/8″ | 7/8″ | 0.083″ |
| 2″ | – | – | – | 2-1/8″ | 4-1/2″ | 0.213″ |
Copper Flat Washers Standard Dimensions, Size, Table
| Bolt Size | SAE | USS | ||||
|---|---|---|---|---|---|---|
| OD (in.) | ID (in.) | Thickness | OD (in.) | ID (in.) | Thickness | |
| 1 1/4 | 2.500 | 1.375 | .136/.192 | 3.000 | 1.375 | .136/.192 |
| 1 3/8 | 2.750 | 1.500 | .136/.213 | 3.250 | 1.500 | .153/.213 |
| 7/32 (#12) | 0.562 | 0.250 | .051/.080 | – | – | – |
| 1/2 | 1.062 | 0.531 | .074/.121 | 1.375 | 0.562 | .086/.132 |
| 1/4 (#14) | 0.625 | 0.281 | .051/.080 | 0.734 | 0.312 | .051/.080 |
| 5/16 | 0.688 | 0.344 | .051/.080 | 0.875 | 0.375 | .064/.104 |
| 3/8 | 0.812 | 0.406 | .051/.080 | 1.000 | 0.438 | .064/.104 |
| 3/16 (#10) | 0.500 | 0.220 | .036/.065 | 0.560 | 0.250 | .036/.065 |
| 5/8 | 1.312 | 0.656 | .074/.121 | 1.750 | 0.688 | .108/.160 |
| 3/4 | 1.469 | 0.812 | .108/.160 | 2.000 | 0.812 | .122/.177 |
| 1/8 (#6) | 0.375 | 0.156 | .036/.065 | – | – | – |
| 5/32 (#8) | 0.438 | 0.188 | .036/.065 | – | – | – |
| 7/8 | 1.750 | 0.938 | .108/.160 | 2.250 | 0.938 | .136/.192 |
| 1 | 2.000 | 1.062 | .108/.160 | 2.500 | 1.062 | .136/.192 |
| 3 | – | – | – | 5.500 | 3.125 | .249/.327 |
| 2 1/2 | – | – | – | 5.000 | 2.625 | .210/.280 |
| 2 | – | – | – | 4.500 | 2.125 | .153/.213 |
| 1 5/8 | – | – | – | 3.750 | 1.750 | .153/.213 |
| 1 3/4 | – | – | – | 4.000 | 1.875 | .153/.213 |
Weight Chart of Copper Washers
| Inner Diameter (mm) | Outer Diameter (mm) | Weight (grams) | Thickness (mm) |
|---|---|---|---|
| 10 | 18 | 1.66 | 2 |
| 12 | 20 | 1.99 | 2 |
| 25 | 35 | 5.73 | 2 |
| 8 | 16 | 1.38 | 2 |
| 8 | 14 | 1.19 | 2 |
| 20 | 30 | 4.25 | 2 |
| 14 | 22 | 2.31 | 2 |
| 15 | 25 | 2.84 | 2 |
| 5 | 10 | 0.69 | 2 |
| 6 | 12 | 0.91 | 2 |
Copper Washers Torque Chart
| Bolt Size (mm) | Recommended Torque (Nm) | Washer Outer Diameter (mm) |
|---|---|---|
| 18 | 45-50 | 24 |
| 20 | 55-60 | 26 |
| 14 | 25-30 | 20 |
| 22 | 70-80 | 28 |
| 6 | 3-5 | 12 |
| 10 | 12-15 | 16 |
| 16 | 35-40 | 22 |
| 12 | 18-22 | 18 |
| 8 | 7-10 | 14 |
| 24 | 85-100 | 30 |
Mechanical Properties of Cu Copper Flat Washer
| Property | Value |
|---|---|
| Modulus of Elasticity | 110 GPa |
| Poisson’s Ratio | 0.34 |
| Shear Strength | 130 MPa (approx.) |
| Fatigue Strength | 55 MPa (approx.) |
| Tensile Strength | 210 MPa (approx.) |
| Yield Strength | 33 MPa (approx.) |
| Elongation | 40% (approx.) |
| Hardness | 35-45 HB (Brinell hardness scale) |
Copper Round Washer Chemical Composition
| Material designation | COMPOSITION % | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Element | Cu | Ag | Bi | O | P | Pb | Other elements (see note) | |||
| Symbol | Number | Total | Excluding | |||||||
| Cu-ETP | CW004A | min. max. | 99,90(1) – | – – | – 0,0005 | – 0,040(2) | – – | – 0,005 | – 0,03 | Ag. O |
| Cu-FRHC | CW005A | min. max. | 99,90(1) – | – – | – – | – 0,040(2) | – – | – – | – 0,04 | Ag. O |
| Cu-OF | CW008A | min. max. | 99,95(1) – | – – | – 0,0005 | – -(3) | – – | – 0,005 | – 0,03 | Ag. |
| CuAg 0,04 | CW0011A | min. max. | Balance – | 0,03 0,05 | – 0,0005 | – 0,040 | – – | – – | – 0,03 | Ag. O |
| CuAg 0,07 | CW0012A | min. max. | Balance – | 0,06 0,08 | – 0,0005 | – 0,040 | – – | – – | – 0,03 | Ag. O |
Applications Copper Fasteners, Gaskets & Washers
Copper fastening and sealing components are used across various industrial sectors because of their conductivity, corrosion resistance, malleability, and thermal properties.
- Electrical Industry: Copper fasteners and washers are parts that are used in electrical panels, switchgear, transformers, busbar assemblies, electrical connections, electrical equipment and grounding systems.
- Automotive Industry: Selected applications in the automotive and engine industries where heat resistance, sealing, and conductivity are desired include copper gaskets, copper washers, copper bolts and other copper components.
- Plumbing Industry: Washers and sealing parts made of copper used in plumbing connections, plumbing fittings, valves etc. where sealing parts with a reliable sealing and corrosion resistance are needed.
- HVAC Industry: In the HVAC units, refrigeration systems, piping assemblies and mechanical connections.
- Industrial Equipment: Copper fasteners, gaskets, and washers are utilized in machinery, industrial equipment, pumps, and heat-transfer systems, piping assemblies, and maintenance.
- Engineering Applications: These copper components are used in general engineering, fabrication, mechanical assemblies, electrical installations and special industrial applications.