Jiaxing City Qunbang Hardware Co., Ltd
| Payment Terms | L/C, T/T |
| Supply Ability | 500TON/MONTH |
| Delivery Time | 30DAYS |
| Packaging Details | 25KG/CTN,36CTN/PALLET or small packing |
| Standard | AS1252 |
| Material | Carbon Steel |
| Type | Hexagon Head |
| class | 8.8 |
| HS Code | 73181590 |
| Surface treatment | HDG |
| Brand Name | QBH |
| Model Number | AS1252 |
| Certification | ISO9001 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 500TON/MONTH |
| Delivery Time | 30DAYS | Packaging Details | 25KG/CTN,36CTN/PALLET or small packing |
| Standard | AS1252 | Material | Carbon Steel |
| Type | Hexagon Head | class | 8.8 |
| HS Code | 73181590 | Surface treatment | HDG |
| Brand Name | QBH | Model Number | AS1252 |
| Certification | ISO9001 | Place of Origin | CHINA |
| High Light | M16-M36 HDG bolt set ，Class 8.8 carbon steel bolt ，High strength assembled nut washer | ||
AS/NZS 1252 High-Strength Structural Bolt Assemblies – M16 to M36, HDG, Class 8.8 (Bolt/Nut/Washer)
This product is a complete high-strength structural bolting assembly manufactured and verified to AS/NZS 1252 . Designed for steel-to-steel connections in building and infrastructure projects, each assembly comprises a property class 8.8 hex head bolt, a property class 8 hex nut, and a hardened washer . Available in diameters from M16 to M36, the assembly features a metric coarse pitch thread and is finished with a hot-dip galvanized (HDG) coating for superior corrosion resistance in external environments
| AS1252 | |
| Size: | M16-M36 |
| Finish: | HDG |
| Class: | 8.8 |
| Material: | Medium carbon, alloy steel |
| Packing: | Bulk/boxes in cartons/bulk in polybags/-buckets,etc. |
| Pallet: | Solid wood pallet,plywood pallet,ton box/bag,etc. |
What are the specific mechanical property requirements for the bolt and nut in this assembly?
The bolt is manufactured to property class 8.8, requiring a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa . The mating nut is property class 8, with a proof load stress that matches the bolt's minimum tensile strength to ensure thread stripping does not occur before bolt fracture . The washer is through-hardened to a core hardness range of 20 to 45 HRC to properly distribute clamping load under the nut .
How does the "K0" designation affect the traceability and verification of these structural bolts?
The "K0" designation mandates specific third-party verification testing as outlined in AS/NZS 1252.2 . Each bolt head must be permanently marked with three radial lines (positioned at approximately 2, 6, and 10 o'clock), the 8.8 grade marking, the manufacturer's identification mark, and a unique traceability code . This marking system allows full traceability to the specific batch's 3.1 inspection certificate, confirming that the assembly has passed the required proof load and tensile tests .
What are the dimensional and coating requirements for the HDG finish on these assemblies?
The hot-dip galvanized coating is applied to meet the thickness requirements of AS/NZS 4680 . To accommodate this coating thickness, threads are manufactured with an oversize tolerance (6az) before galvanizing, ensuring that after coating the final thread fit mates correctly with the Class 8 nut . The washer features three dimples (nibs) on its outer circumference, which is the distinct identification mark for a hardened structural washer compliant with AS1252 .
Company Details
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...
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