Silicon bronze is an alloy made from copper, silicon, and usually tin. It is known for its high corrosion resistance, electrical conductivity, and strength. Silicon bronze fasteners are used in various applications where corrosion resistance and strength are important, such as marine and outdoor construction, as well as in electrical and electronic components. They can be found in the form of screws, bolts, nuts, and other types of fasteners. Silicon bronze fasteners are typically more expensive than other types of bronze and copper alloys due to their high-performance characteristics. They are also relatively soft, which may necessarily require the use of special installation and handling procedures.
Few things to consider when using silicon bronze fasteners:
Compatibility: Silicon bronze fasteners should be used with materials that are compatible with their corrosion-resistant properties. For example, they should not be used with aluminium or magnesium, as these materials can corrode when in contact with bronze.
Thread lubrication: Silicon bronze fasteners may require the use of a thread lubricant to prevent galling (a form of wear that occurs when two surfaces slide against each other). This is especially important when installing fasteners in high-stress applications or environments with extreme temperature fluctuations.
Pre-drilling: Silicon bronze fasteners may require pre-drilling to prevent splitting or cracking in the material they are being installed. This is crucial when working with hardwoods or when installing fasteners in thin materials.
Torque: Silicon bronze fasteners should be tightened to the appropriate torque to ensure proper installation and prevent damage to the fasteners or the materials they are being installed in. It is essential to ensure that the torque values that are recommended by the manufacturer are adhered to. In order to ensure that they will perform to the best of their abilities, it is necessary to take into account how well they will get along with other materials and how to install them correctly.
| Silicon Bronze Fasteners Specifications | ASTM B584 / ASME SB584 |
| Silicon Bronze Fasteners Standard | DIN, ASTM, BS and all International Standards |
| Silicon Bronze Fasteners Length | 3 mm to 200 mm |
| Silicon Bronze Nuts Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| Silicon Bronze Bolt / Screw Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| Silicon Bronze Machine Screws Size | M1.6 - M12 |
| Silicon Bronze Washers Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| Silicon Bronze Fasteners Grades | Grade 2, Grade 5 etc. |
| Silicon Bronze Fasteners Type | Hex Coupling Nut, Hex Nut, Square Nut, Hex Domed Cap Nuts, Hex Head Bolts, Stud Bolts, Socket Hexagon Head Screw, Pan Head Screw, Socket Head Cap Screw, Wing Screw, T-Head Bolts, Foundation Bolts,Screw, Studs, Socket Screw, Hex Set Screw, Cap Screw, Machine Screw, Wing Screw, Spring Washers, Washers, Studs, Marine Anchors, Anchors, Hexagon Nut,U- Bolts, Anchor Bolt, Mushroom Head Square Neck Bolts, J Bolts,Eye Bolt,Structural Bolts, Bolts, Nuts, Sockets, Screws, Allen Cap screw, Nut. |
| 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 |
| 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.ASTM A194 GR. 8 | 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 |
| Bolt Size | USS | SAE | ||||
| OD (in.) | ID (in.) | Thickness | OD (in.) | ID (in.) | Thickness | |
| 1/8 (#6) | - | - | - | 0.375 | 0.156 | .036/.065 |
| 5/32 (#8) | - | - | - | 0.438 | 0.188 | .036/.065 |
| 3/16 (#10) | 0.560 | 0.250 | .036/.065 | 0.500 | 0.220 | .036/.065 |
| 7/32 (#12) | - | - | - | 0.562 | 0.250 | .051/.080 |
| 1/4 (#14) | 0.734 | 0.312 | .051/.080 | 0.625 | 0.281 | .051/.080 |
| 5/16 | 0.875 | 0.375 | .064/.104 | 0.688 | 0.344 | .051/.080 |
| 3/8 | 1.000 | 0.438 | .064/.104 | 0.812 | 0.406 | .051/.080 |
| 7/16 | 1.250 | 0.500 | .064/.104 | 0.922 | 0.469 | .051/.080 |
| 1/2 | 1.375 | 0.562 | .086/.132 | 1.062 | 0.531 | .074/.121 |
| 9/16 | 1.469 | 0.625 | .086/.132 | 1.156 | 0.594 | .074/.121 |
| 5/8 | 1.750 | 0.688 | .108/.160 | 1.312 | 0.656 | .074/.121 |
| 3/4 | 2.000 | 0.812 | .122/.177 | 1.469 | 0.812 | .108/.160 |
| 7/8 | 2.250 | 0.938 | .136/.192 | 1.750 | 0.938 | .108/.160 |
| 1 | 2.500 | 1.062 | .136/.192 | 2.000 | 1.062 | .108/.160 |
| 1 1/8 | 2.750 | 1.250 | .136/.192 | 2.250 | 1.250 | .108/.160 |
| 1 1/4 | 3.000 | 1.375 | .136/.192 | 2.500 | 1.375 | .136/.192 |
| 1 3/8 | 3.250 | 1.500 | .153/.213 | 2.750 | 1.500 | .136/.213 |
| 1 1/2 | 3.500 | 1.625 | .153/.213 | 3.000 | 1.625 | .153/.213 |
| 1 5/8 | 3.750 | 1.750 | .153/.213 | - | - | - |
| 1 3/4 | 4.000 | 1.875 | .153/.213 | - | - | - |
| 1 7/8 | 4.250 | 2.000 | .153/.213 | - | - | - |
| 2 | 4.500 | 2.125 | .153/.213 | - | - | - |
| 2 1/4 | 4.750 | 2.375 | .320/.248 | - | - | - |
| 2 1/2 | 5.000 | 2.625 | .210/.280 | - | - | - |
| 2 3/4 | 5.250 | 2.875 | .228/.410S | - | - | - |
| 3 | 5.500 | 3.125 | .249/.327 | - | - | - |
| Nominal | Thread. | Hex Socket Size | Body diameter and Head height | Head Dia | Soc. length | ||
| Size | Pitch | Max | Min | Max | Min | ||
| J | D /H | A | K | ||||
| M3 | 0.5 | 2.50 | 3.00 | 2.86 | 5.50 | 5.20 | 1.3 |
| M4 | 0.70 | 3.00 | 4.00 | 3.82 | 7.00 | 6.64 | 2.00 |
| M5 | 0.8 | 4.00 | 5.00 | 4.82 | 8.50 | 8.14 | 2.70 |
| M6 | 1.0 | 5.00 | 6.00 | 5.82 | 10.00 | 9.64 | 3.30 |
| M8 | 1.25 | 6.00 | 8.00 | 7.78 | 13.00 | 12.57 | 4.3 |
| M10 | 1.5 | 8.00 | 10.00 | 9.78 | 16.00 | 15.57 | 5.50 |
| M12 | 1.75 | 10.00 | 12.00 | 11.73 | 18.00 | 17.57 | 6.60 |
| M16 | 2.0 | 14.00 | 16.00 | 15.73 | 24.00 | 23.48 | 8.80 |
| M20 | 2.5 | 17.00 | 20.00 | 19.67 | 30.00 | 29.48 | 10.70 |
| M24 | 3.0 | 19.00 | 24.00 | 23.67 | 36.00 | 35.38 | 12.90 |
| Nut Size (mm) |
Diameter* (mm) |
Height (mm) |
||
|---|---|---|---|---|
| Hex Nut | Jam Nut | Nylock Nut | ||
| 2 | 4 | 1.6 | 1.2 | - |
| 2.5 | 5 | 2 | 1.6 | - |
| 3 | 5.5 | 2.4 | 1.8 | 4 |
| 4 | 7 | 3.2 | 2.2 | 5 |
| 5 | 8 | 4 | 2.7 | 5 |
| 6 | 10 | 5 | 3.2 | 6 |
| 7 | 11 | 5.5 | 3.5 | - |
| 8 | 13 | 6.5 | 4 | 8 |
| 10 | 17 | 8 | 5 | 10 |
| 12 | 19 | 10 | 6 | 12 |
| 14 | 22 | 11 | 7 | 14 |
| 16 | 24 | 13 | 8 | 16 |
| 18 | 27 | 15 | 9 | 18.5 |
| 20 | 30 | 16 | 10 | 20 |
| * This is the diameter across the flats. It is also the size of wrench to use. | ||||
| Size | USS | SAE | ||||
|---|---|---|---|---|---|---|
| Inside Diameter (A) |
Outside Diameter (B) |
Thickness (C) |
Inside Diameter (A) |
Outside Diameter (B) |
Thickness (C) |
|
| #2 | - | - | - | 3/32" | 1/4" | 0.020" |
| #4 | - | - | - | 1/8" | 5/16" | 0.032" |
| #6 | - | - | - | 5/32" | 3/8" | 0.049" |
| #8 | - | - | - | 3/16" | 7/16" | 0.049" |
