Industrial Grade Square Head Bolt

Industrial Grade Square Head Bolt is a type of fastener with a four-sided head, often used in places where a wrench needs a solid grip, like old machinery or heavy-duty equipment. If you need fasteners for industrial work, Xiaoguo® has a big selection—from regular steel bolts supplied by various manufacturers to special ones for heavy machines.

Model:BS 916-1953

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Product Description

Industrial Grade Square Head Bolt are one of the common fasteners that you often encounter when repairing heavy equipment. Their four flat surfaces can fit well with the wrench, making them very convenient to use. This method is particularly effective in removing rusted or stuck bolts on large industrial equipment such as tractors and bulldozers, and can effectively solve the problem of disassembly.Mechanics use them to fix engine components, transmissions, and hydraulic parts because the square shape helps prevent the wrench from slipping, even when you apply force.Compared to round or hexagonal bolts, square-head bolts perform better in dirty, greasy environments where tools can slip, a problem the square head design effectively prevents. Whether repairing a farm tractor or maintaining factory machinery, they provide a secure hold that easily withstands long-term wear and pressure.

Product details

When repairing old cars or trucks (especially those manufactured before the 1980s), many repair technicians will choose Industrial Grade Square Head Bolt because this was the original type. You can see them in the engine compartment, brackets, and chassis - they fit perfectly with the style of that era. The square-head design is sturdy and simple, and is in line with the manufacturing method of old vehicles. They can withstand a certain degree of wear and tear, and are not likely to loosen even if the surface is covered with oil or dirt. Moreover, since repairs can be done with basic tools, restoring these classic models becomes much simpler.

Mon	1-1/4	1-3/8	1-1/2	1-5/8	1-3/4	2	2-1/4	2-1/2	2-3/4	3	3-1/4
P	7	6	6	5	5	4.5	4	4	3.5	3.5	3.25
ds max	1.3	1.425	1.55	1.685	1.81	2.06	2.25	2.5	2.75	3	3.25
k max	0.83	0.92	1	1.08	1.17	1.33	1.5	1.67	1.83	2	2.17
k min	0.79	0.88	0.96	1.02	1.11	1.27	1.42	1.59	1.75	1.9	2.07
s max	1.86	2.05	2.22	2.41	2.58	2.76	3.15	3.55	3.89	4.18	4.53
s min	1.815	2.005	2.175	2.365	2.52	2.7	3.09	3.49	3.83	4.08	4.43
r max	0.04688	0.04688	0.04688	0.04688	0.04688	0.04688	0.0625	0.0625	0.0625	0.0625	0.09375

Product Advantages

Our Industrial Grade Square Head Bolt are specifically designed for applications where high torque may cause the wrench to slip off the hexagonal head. The square design provides a more stable grip, making them ideal for woodworking, heavy timber construction, mining machinery, and retro-style restoration projects.The square-head bolts have a classic and sturdy appearance, and are often chosen due to their anti-rotation feature and historical authenticity in certain designs.

Industrial Grade Square Head Bolt