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{"title":"ANSI ASME B18.2.1 HIGH QUALITY HEX BOLTS Gr2 Gr5 Gr8 with HDG YZP ZP BLACK 1\/4~1","imgUrl":"https:\/\/img.chinax.com\/nimg\/cf\/dd\/62f8a6cd31691d97472b974eb729-200x200-1\/ansi_asme_b18_2_1_high_quality_hex_bolts_gr2_gr5_gr8_with_hdg_yzp_zp_black_1_2f4_7e1_1_2f2_22_all_kind_of_length_unc_unf.jpg","attrs":{"Brand Name":"QBH","Model Number":"ANSI 1\/4\u201d to 3\"","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"ANSI ASME B18.2.1 Carbon Steel Heavy Hex Cap Screw","imgUrl":"https:\/\/img.chinax.com\/nimg\/f2\/84\/d6dee2ccc98cfd4cecb4c3a18985-200x200-1\/ansi_asme_b18_2_1_carbon_steel_heavy_hex_cap_screw.jpg","attrs":{"Brand Name":"QBH","Model Number":"ANSI 3\/8\u201d to 3\"","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"MECHANICAL PARTS BUILDING ACCESSORIES PHOTOVOLTAIC ACCESSORIES DIN931 GOMET HEX","imgUrl":"https:\/\/img.chinax.com\/nimg\/bc\/b2\/39b1abc7f2226ed3baaa814c2997-200x200-1\/mechanical_parts_building_accessories_photovoltaic_accessories_din931_gomet_hex_bolts_cl8_8_m8_m36.jpg","attrs":{"Brand Name":"QBH","Model Number":"DIN931","Certification":"ISO9001","Place of Origin":"CHINA"}}
{"title":"DIN 931 half thread Hexagon head hex bolts with shank class4.8 class 8.8 class","imgUrl":"https:\/\/img.chinax.com\/nimg\/e4\/85\/09bea0b92475a6cde09950d8dcd3-200x200-1\/din_931_half_thread_hexagon_head_hex_bolts_with_shank_class4_8_class_8_8_class_10_9_zp_yzp_black_hdg_color.jpg","attrs":{"Brand Name":"QBH","Model Number":"M5-M68 each length","Certification":"ISO9001","Place of Origin":"CHINA"}}
EN 14399-4 High-Strength Structural Bolting Assemblies - System HV, Carbon Steel, Hexagon Bolt is a high-strength structural bolting assembly manufactured to EN 14399-4 for System HV, specifically designed for preloaded joints in steel structures. The assembly comprises a property class 10.9 hexagon head bolt, a property class 10 hexagon nut, and two hardened washers to EN 14399-6. Available in thread sizes M12 to M36, the bolt features a short thread length and large width across flats, engineered to achieve ductility through plastic deformation of engaged threads under preloading.
Style
EN14399-4 HV Carbon Steel Hex Bolt M16 - M36
Standard
DIN, ANSI, JIS, GB, BS, ISO, etc.
Size
M5-M30
Class
4.8, 5.8, 6.8, 8.8, 10.9, 12.9
Coating
Black, zinc, HDG, heat treatment, plain, etc.
Material
Carbon steel
Packing
Bulk/boxes in cartons, bulk in poly bags/buckets, etc.
Pallet
Solid wood pallet, plywood pallet, ton box/bag, etc.
Shipment Port
Shanghai & Ningbo
Mechanical Property Requirements for System HV Components
The bolt conforms to property class 10.9 per EN ISO 898-1, requiring minimum tensile strength of 1000 MPa and yield strength of 900 MPa. The mating nut is property class 10 to EN ISO 898-2, with proof load stress matching the bolt's tensile capacity. Washers are through-hardened to 300-370 HV hardness per EN 14399-6 to withstand clamping forces without embedment.
Short Thread Length Design and Preloading Performance
The bolt features a deliberately short thread length (typically with thread run-out before full shank diameter), ensuring that plastic deformation under preload occurs predominantly in the engaged threads rather than the bolt shank. This design achieves the required ductility for preloading of at least 0.7 fub * As (70% of ultimate tensile load) as specified in EN 1993-1-8 (Eurocode 3), while maintaining consistent clamp force in structural connections.
Assembly and Coating Requirements for EN 14399-4 Compliance
The assembly must include two washers per EN 14399-6 (one under bolt head, one under nut) to distribute preload forces. For hot-dip galvanized versions, threads are manufactured with 6az tolerance before coating per ISO 965-5, and nuts receive molybdenum disulphide lubricant (characteristic black appearance) to achieve consistent torque-tension relationships during preloading. All components must bear CE marking and traceability codes per hEN 14399-4, with batch-specific 3.1 inspection certificates.
Frequently Asked Questions
What's your experience like?
Our general manager has been engaged in the export of fasteners since 2005. Our team can provide you with professional fasteners selling and smooth export services.
How about your price?
High quality products with reasonable price. Please give us an inquiry, and we will quote you a price for your reference immediately.
How do you control your quality?
We require the quality control department to inspect every production link of each shipment. And we can provide you MTC and mill certificate when the goods are finished.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Trading Company,Seller
Year Established:
2014
Total Annual:
3000-4500
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Jiaxing City Qunbang Hardware Co., Ltd. (brand: QBH) is a fastener enterprise integrating production, design, sales, and after-sales service. The company is located in the Hangzhou-Jiaxing-Huzhou Plain, close to Shanghai, Ningbo, and Zhapu ports. Thanks to its superior geographical position and conv... Jiaxing City Qunbang Hardware Co., Ltd. (brand: QBH) is a fastener enterprise integrating production, design, sales, and after-sales service. The company is located in the Hangzhou-Jiaxing-Huzhou Plain, close to Shanghai, Ningbo, and Zhapu ports. Thanks to its superior geographical position and conv...
