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| Union Stainless Steel Hex Flange Bolt |
| Name |
| Hex Flange Bolt |
| Material |
| Stainless Steel |
| Size |
| M6x8 To M24x250 or non-standard as request & design |
| Surface Treatment |
| Plain, Passivation,Polishing,Customized |
| OEM |
| Made in China |
| Lead Time |
| Based on quantity |
| Stainless Steel Chemical Composition | |||||||||
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Ni | Cr | Mo | Other |
| 201 | 0.15 | 1.00 | 5.5-7.5 | 0.060 | 0.03 | 3.5-5.5 | 16-18 | N≤0.25 | |
| 304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-10.0 | 18-20 | ||
| 304L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-12.0 | 18-20 | ||
| 321 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-13.0 | 17-19 | Ti≤5*C% | |
| 316 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 10.0-14.0 | 16-18 | 2-3 | |
| 316L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 10.0-15.0 | 16-18 | 2-3 | |
| 309S | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 12.0-15.0 | 22-24 | ||
| 410 | 0.15 | 1.00 | 0.03 | - | 11.5-13.5 | ||||
| 420 | 0.26-0.4 | 1.00 | 0.03 | - | 12-14 | ||||
| 430 | 0.12 | 0.75 | 1.00 | 0.040 | 0.03 | - | 16-18 | ||
| Main Fastener Coating | |||
| Types | Application | Spray Test Hours | Characteristics |
| Zinc, Electroplated | All Metal | 96Hours | Lower cost and bright surface |
| Hot Dip Galvanized | All Metal | 96Hours | Low corrosion rate and resists mechanical damage. |
| Electro Nickel | All Metal | 200Hours | Flexibility in plating volume and thickness |
| Mechanical Plating | Steel | 1000Hours | Smooth finish with high anti-corrosion grade |
| Black Oxide | All Metal | 3-5Hours | Cheap |
| Dacrotized | Steel | 1000Hours | Pollution-free ceramic coating |
| Passivation | Stainless Steel | / | Dissolved iron contaminants |
| Wax | Stainless Steel & Plated Fasteners | Fair, used as a lubricate | Used for ease of assembly |
Critical Solar Mounting Hardware: Screws, Bolts, and Nuts
High-quality solar mounting relies on specialty screws, bolts, and nuts to securely fasten photovoltaic panels and racks. These components bear the mechanical loads, prevent loosening from wind vibration, and resist corrosion from outdoor exposure.
Bolts
Bolts join frame components and solar panels together with corresponding washers and nuts. Many specialized varieties exist for solar applications.
Carriage Bolts
Rounded smooth heads to prevent damage to material surfaces while being installed. A square portion just below the head grabs into the assembly and prevents spinning.
In addition to these foundational solar mounting fasteners, components like racking rails, clamps, and roof attachments rely on the proper use of screws, bolts, washers, and nuts to create safe and secure installations. Stainless steel hardware and UV-resistant components ensure long-lasting performance for decades of exposure to outdoor elements. With the right selection of mounting products, solar installers can efficiently assemble PV systems that will stand the test of time.
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