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Brian Fasteners, located in Houston, USA, is your go-to source for top-notch Square Bolts that are built to ensure structural integrity and deliver industrial-grade performance. We’ve earned a solid reputation for our precision manufacturing and outstanding customer support, providing Square Bolts that not only meet international standards but also cater to a variety of fastening needs. Our Square Bolts stand out thanks to their distinctive square head design, which enhances grip and torque during installation. Whether it’s for construction, wood connections, or heavy machinery, Brian Fasteners offers Square Bolts in a range of materials and finishes to fit different application requirements.
Typically, Square Bolts are crafted from carbon steel, alloy steel, or stainless steel, including grades 304, 316, or 201, depending on what you need. They boast impressive mechanical properties, with tensile strengths ranging from 400 to 800 MPa and yield strengths between 240 and 500 MPa, which can vary based on the material and heat treatment. The square head design provides a larger bearing surface for wrench contact, minimizing the chance of slippage. If you opt for stainless steel, you’ll benefit from corrosion resistance, while alloyed versions offer added strength. These bolts are often threaded along part or all of their length and come with either coarse or fine threads.
| Specification | ||
|---|---|---|
| Material | Standards | Grades |
| Nickel Alloy | ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 | UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3) |
| Stainless Steel | ASTM / ASME A/SA 193 / 194 | B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4 |
| Alloy Steel | ASTM / ASME A/SA 193 / 194 GR | B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M |
| Duplex Steel | UNS NO. S 31803, S 32205 | Range: M10 TO M100, LENGTH UPTO 5 METERS |
| Nonmetallic Materials: | Acrylic, Kel-F, Lexan, Polypropylene, Poly Vinyl Chloride, Teflon, Zytel 31, 101, 105 | |
| High-Temp Alloys | Discaloy, 19-9 DL, 16-25-6, A286, Titanium, Nimonic 80, Mulitmet, Haynes 25, Greek Ascalloy, Unitemp 252, Udimet 500, Rene 41, Inco 700, Inco 901, Hastelloy X, 235, Waspaloy, RA 330 | |
| Copper Base Alloys | Copper, Brasses: Yellow, Free-cut, Red, Naval, Bronze: Commercial, Phosphor, Silicon A & B, Aluminum, Silicon-Aluminum, Manganese, Ampco Alloys, Munitz Metal, Cupro-Nicles | |
| Aluminum Alloys: | 1100, 2011, 2014, 2017, 2024, 3003, 5052, 6053, 6061, 7075 | |
| Of Bolts | (C) | (D) | (F) | (H) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Width Corners Across \ | Diameter Of Body | Width Flats Across | Height Table | ||||||
| Maximum | Minimum | Maximum | Basic | Maximum | Minimum | Basic | Maximum | Minimum | |
| 1⁄2 | 1.0061 | 0.0995 | 0.0515 | 3⁄4 | 0.0750 | 0.0725 | 21⁄64 | 0.0348 | 0.0308 |
| 5⁄8 | 1.0326 | 1.0244 | 0.0642 | 15⁄16 | 0.0938 | 0.0906 | 27⁄64 | 0.0444 | 0.0400 |
| 3⁄4 | 1.0591 | 1.0494 | 0.0768 | 11⁄8 | 1.0125 | 1.0088 | 1⁄2 | 0.0524 | 0.0476 |
| 7⁄8 | 1.0856 | 1.0742 | 0.0895 | 15⁄16 | 1.0312 | 1.0269 | 19⁄32 | 0.0620 | 0.0568 |
| 1 | 2.0121 | 1.0991 | 1.0022 | 11⁄2 | 1.0500 | 1.0450 | 21⁄32 | 0.0684 | 0.0628 |
| 11⁄8 | 2.0386 | 2.0239 | 1.0149 | 111⁄16 | 1.0688 | 1.0631 | 3⁄4 | 0.0780 | 0.0720 |
| 11⁄4 | 2.0652 | 2.0489 | 1.0277 | 17⁄8 | 1.0875 | 1.0812 | 27⁄32 | 0.0876 | 0.0812 |
| 13⁄8 | 2.0917 | 2.0738 | 1.0404 | 21⁄16 | 2.0062 | 1.0994 | 29⁄32 | 0.0940 | 0.0872 |
| 11⁄2 | 3.0182 | 2.0986 | 1.0531 | 21⁄4 | 2.0250 | 2.0175 | 1 | 1.0036 | 0.0964 |
| 13⁄4* | 29⁄16 | 13⁄16 | |||||||
| 2* | 215⁄16 | 15⁄16 | |||||||
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Square Bolts find their place in a multitude of industries and applications where secure and stable fastening is a must. You’ll commonly see them in construction projects, especially for timber connections, as the square head prevents rotation when embedded in wood. They’re also used in agricultural machinery, steel fabrication, rail infrastructure, bridges, and even in vintage or restoration projects that call for traditional hardware. Their design makes them perfect for high-load bearing and high-torque applications, ensuring easy handling and dependable performance in both structural and non-structural assemblies across various sectors.
We prioritize customer satisfaction and ensure a seamless experience by providing complete documentation alongside our premium square bolts. Our package includes the required documentation, such as a marketing invoice, package list, fumigation certificate, heat treatment protocol, quality assurance plan, and NABL-approved laboratory test report. In addition, we issue a range of test certificates for our square bolts, including MTC according to EN 10204/3.1b, PMI test certificate, 100% radiography test report and third-party inspection certificate.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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