| Customization: | Available |
|---|---|
| Material: | Carbon Steel |
| Type: | Hexagon Head |
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Before its withdrawal in 2016, the esteemed ASTM A490 specification, a hallmark in the fastener industry, provided guidelines for quenched and tempered alloy steel. These encompassed the stalwart heavy hex structural bolts, renowned for their robust applications. Ranging from 1/2″ to 1-1/2″ in diameter, with a formidable minimum of 150 ksi tensile strength, these bolts are engineered for structural connections, featuring shorter thread lengths than their standard hex counterparts. For comprehensive thread lengths and related dimensions, consult the Structural Bolts section on our site. A490 bolts parallel A325 heavy hex structural bolts in function and size but boast superior strength due to their alloy steel composition instead of medium carbon steel. The A490 specification is exclusive to heavy hex structural bolts. For bolts sharing similar mechanical properties but varying thread lengths, refer to Specification A354 grade BD.ASTM A490 bolts must not be hot-dip galvanized, mechanically deposited, or electroplated with zinc, given the potential hydrogen embrittlement risk. However, ASTM approves coating A490 bolts with Zinc/Aluminum Corrosion Protective Coatings as per ASTM F1136 Grade 3, commercially known as Geomet. Rigorous testing, including Magnetic Particle Inspection for detecting longitudinal discontinuities and transverse cracks, is obligatory under the A490 specification.Ningbo Beilun Milfast Metalworks Co., Ltd., a distinguished fasteners specialist in Ningbo, excels in producing Threaded Rods, Studs, Bolts, Nuts, Washers, and expertly crafted Stamping metal parts. Our unwavering commitment to product quality and exemplary service has earned us the trust and appreciation of our valued customers.Ningbo Beilun Milfast Metalworks Co., Ltd. offers precision-engineered fasteners including standard Threaded Rods, bolts, nuts, stud bolts, washers, meticulously crafted as follows: Ningbo Beilun Milfast Metalworks Co., Ltd adheres to a rigorous standard system, meticulously controlling every phase from raw material acquisition to the final production process. This ensures the factory consistently delivers high-quality products. By maintaining strict management practices, we guarantee superior product quality, earning the unwavering satisfaction of our esteemed customers.
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