Square Bolts
Square head machine nut were the industry standard prior to hex bolts gaining prominence. Square bolts are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure. Square lag screws are also used for these purposes.
Crossarm or machine nut are commonly supplied for the utility industry and included an added cone point.
Application : Square head machine nuts were the industry standard prior to hex nut gaining prominence. Squares are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure. Square lag screws are also used for these purposes.
Types : SQUARE NECK BOLTS are also known as square neck carriage bolts. Square neck bolts are mostly used in wood. They are common to have a square or doomed top and a square under the head.
The square neck bolt square pulls into the wood as the nut is tightened for a very secure fit. Available in a variety of diameters, square neck bolts are another common choice for any job.
Square neck bolts are made from a variety of types and grades of steel to suffice for the abundance of applications square neck bolts are used. Below are just a few of the common bolt types.
- Zinc-plated bolts : Moderate protection against rust.
- Steel grade 5 bolts : Medium carbon steel; used in high-strength automotive applications.
- Stainless steel 18-8 bolts : This material of choice for exterior and marine applications is produced from an alloy of steel with a high corrosion resistance.
- Silicon bronze bolts : Used in wood boat building this alloy of copper has better strength and corrosion resistance than brass.
- Hot dipped galvanized bolts : Much more corrosion resistant than zinc-plated. These thick coated bolts work with galvanized nuts for exterior use in the coastal areas.
Other bolt types available at BOLT PRODUCTS INC :
Size :
Bolt Diameter |
D |
F |
C |
H |
|||||
Body Diameter |
Width Across Flats |
Width Across Corners |
Height |
||||||
Max |
Basic |
Max |
Min |
Max |
Min |
Basic |
Max |
Min |
|
1⁄2 |
0.515 |
3⁄4 |
0.750 |
0.725 |
1.061 |
0.995 |
21⁄64 |
0.348 |
0.308 |
5⁄8 |
0.642 |
15⁄16 |
0.938 |
0.906 |
1.326 |
1.244 |
27⁄64 |
0.444 |
0.400 |
3⁄4 |
0.768 |
11⁄8 |
1.125 |
1.088 |
1.591 |
1.494 |
1⁄2 |
0.524 |
0.476 |
7⁄8 |
0.895 |
15⁄16 |
1.312 |
1.269 |
1.856 |
1.742 |
19⁄32 |
0.620 |
0.568 |
1 |
1.022 |
11⁄2 |
1.500 |
1.450 |
2.121 |
1.991 |
21⁄32 |
0.684 |
0.628 |
11⁄8 |
1.149 |
111⁄16 |
1.688 |
1.631 |
2.386 |
2.239 |
3⁄4 |
0.780 |
0.720 |
11⁄4 |
1.277 |
17⁄8 |
1.875 |
1.812 |
2.652 |
2.489 |
27⁄32 |
0.876 |
0.812 |
13⁄8 |
1.404 |
21⁄16 |
2.062 |
1.994 |
2.917 |
2.738 |
29⁄32 |
0.940 |
0.872 |
11⁄2 |
1.531 |
21⁄4 |
2.250 |
2.175 |
3.182 |
2.986 |
1 |
1.036 |
0.964 |
13⁄4* |
|
29⁄16 |
|
|
|
|
13⁄16 |
|
|
2* |
|
215⁄16 |
|
|
|
|
15⁄16 |
|
|
ASME only defines head dimensions up to 1-1/2". Dimensions for 1-3/4 and 2" are approximate and not covered under the ASME dimensional specifications.
Dimensions per ASME B18.2.1 1996
Specification : Square head machine bolts were the industry standard prior to hex bolts gaining prominence. Square bolts are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure. Square lag screws are also used for these purposes.
Crossarm or machine bolts are commonly supplied for the utility industry and include an added cone point.
Finishing : Plain, black, zinc plated (Cr,3+), zinc plated(Cr,6+), hot dipped galvanized, dacromet, nickel plated, cadmium plated, etc.
Grade : ~