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Help CenterSUS303 1.4305 Y1Cr18Ni9 Free Machining Hex Rod ±0.03mm Tolerance Bolt Nut Mass Production Raw Material Bar
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Product Description:
Stainless Steel Hexagonal Bar – Six-Sided Profile for Fastener & Precision Machining
Stainless steel hexagonal bars (hex bars) are long bars with a six-sided cross-section, manufactured from stainless steel billets through cold drawing or hot rolling processes. The hexagonal shape is specifically designed for manufacturing fasteners (bolts, nuts, set screws) and components that require wrenching surfaces. The across-flats dimension is the critical measurement for hex bars.
ASTM A276 is the primary standard covering cold-finished stainless steel hexagonal bars for general structural and mechanical applications. ASTM A479 is specified for pressure vessel applications. ASTM A484 governs dimensional tolerances.
Why choose hexagonal bars:
Fastener manufacturing – Hex bars reduce material waste when machining hexagonal heads
Automatic lathe friendly – Perfect for high-volume CNC screw machining
Easy wrenching – Six sides provide excellent grip for tools
Cost-effective – Less machining required compared to round bar for hex-shaped parts
Typical applications include:
Fasteners: Bolts, nuts, set screws, studs, threaded rods
Fittings: Pipe fittings, adapters, couplings
Valves: Valve stems, bonnet nuts, packing nuts
Hydraulics: Hydraulic fittings, adapters
General machining: Wrench components, tooling, custom parts
Automotive: Engine components, suspension parts
Marine: Boat hardware, deck fittings
Key Product Specifications (Stainless Steel Bar)
Parameter |
Specification / Range |
Remarks |
Standards |
ASTM A276, A479, EN 10088-3, JIS G4303 |
Others on request |
Grades |
304, 304L, 316L, 316Ti, 321, 310S, 2205, 904L |
Duplex & super austenitic available |
Product Forms |
Round, square, flat, hexagonal |
Angle & channel also available |
Size Range (Round) |
Diameter: 6 mm – 300 mm |
– |
Size Range (Flat) |
Thickness: 3–50 mm; Width: 10–200 mm |
– |
Size Range (Hex) |
Across flats: 8 mm – 100 mm |
– |
Length |
3m / 6m / 12m, or custom cut |
– |
Surface Finish |
Black, bright drawn, peeled, ground, polished |
– |
Tolerances |
Per ASTM A484 |
Precision tolerance available |
Testing |
PMI, Tensile, Hardness, UT (optional) |
Mill cert provided |
Packaging |
Bundled with steel straps, wooden pallet |
Seaworthy, ISPM 15 |
Q1：Do you offer sample orders？
A：Yes, samples are available for quality evaluation. Sample cost is charged but refundable upon bulk order.
Q2：What is your MOQ？
A：Our standard MOQ is 100 kg per specification. For common grades and standard sizes, we accept small batch orders. Mixed orders for different products are also welcome.
Q3：Can you provide custom sizes？
A：Yes, we can produce any length, width, thickness, or diameter based on your drawings. Cutting, slitting, and other processing services are available with tolerance as required.
Q4：What certifications do you provide？
A：Each shipment comes with EN 10204 3.1 mill test certificate (MTC). Third-party inspection reports (SGS/BV/TÜV) can be arranged upon request.
Q5：What is your lead time？
A：7–15 working days for stock items. 20–30 days for custom orders, depending on quantity and specification.
Q6：What surface treatments are available？
A：Various surface treatments are available upon request, including pickled, polished, coated, oiled, or as required.
Q7：What payment terms do you accept？
A：T/T (30% deposit + 70% against BL copy), L/C at sight, Western Union, etc.
Q8：What about packaging for export？
A：Standard seaworthy packaging with waterproof protection, steel straps, corner protectors, and ISPM 15 fumigation certification. Custom packaging is available as required.
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