DIN 6921 Class 8.8 Zinc Plated Serrated Hex Flange Bolt

DIN6921 serrated hex flange bolt combines hex head and integrated serrated flange face to deliver anti‑loosening performance without extra flat washer. Ningbo Gangtong Zheli Fastener Co., Ltd manufactures this fastener strictly complying with DIN 6921, ISO 898‑1 standards for mechanical property requirements. Raw material options include carbon steel SAE1008, SAE1010 for grade 8.8/10.9, stainless steel SS304 (A2‑70), SS316 (A4‑70) for corrosion‑resistant working conditions. This fastener suits wholesale procurement for automotive assembly, engineering machinery and construction projects.

Material & Standard Compliance

Raw material selection decides mechanical performance of DIN6921 serrated hex flange bolt. Carbon steel SAE1008 and SAE1010 are adopted for high‑strength carbon‑steel variants, providing reliable tensile strength after heat treatment. SS304 and SS316 stainless steel blanks are applied for outdoor or humid working scenarios.

All production follows DIN 6921 dimensional specification, ISO 898‑1 mechanical standard, partial batches can meet ASTM A563 requirements. Material test reports and dimension inspection records are available upon buyer request.

Product Specification Table

Surface Treatment Comparison

Different surface finishes offer distinct anti‑corrosion capacity.

1. Blue‑white zinc plated: General‑purpose anti‑rust finish, fit for indoor normal‑humidity environment, cost‑effective for bulk buying.

2. Yellow zinc plated: Better salt‑spray resistance than blue‑white zinc, widely used for vehicle parts.

3. Black oxide: For high‑strength carbon‑steel bolts, minor anti‑rust effect, focus on mechanical performance.

4. Stainless steel original finish: Outstanding anti‑corrosion performance for coastal and moist environment

Manufacturing & Quality Control

Every production batch of fasteners goes through fixed processing flow: raw material incoming inspection → cold forging → thread rolling → heat treatment (for carbon‑steel high‑grade parts) → surface treatment → finished‑product dimension checking → hardness test.

Ningbo Gangtong Zheli Fastener Co., Ltd carries out sampling inspection for dimension, hardness and thread accuracy before packing, rejects unqualified items strictly to keep batch consistency for importer and project‑based orders.

Why Choose Gangtong Zheli

1. Standard compliance: Produce according to DIN, ISO norms, provide supporting test documents.

2. Multiple material & surface options, support custom specification within DIN6921 scope.

3. Strict batch sampling inspection to stabilize product quality for long‑term wholesale cooperation.

4. Flexible packing solutions for sea shipment of large‑volume procurement.

Packing & Shipping

Standard packing: inner plastic bag plus carton outer package, pallets are available for heavy bulk cargo to avoid damage in sea transport. Custom‑label cartons can be arranged according to buyer’s procurement demand.

FAQ

Q1: What material choices are available for DIN6921 serrated hex flange bolt?

A: Available raw materials contain carbon steel SAE1008, SAE1010 for grade8.8/10.9, stainless steel SS304, SS316 for anti‑corrosion usage.

Q2: Does the factory supply test certificates for batch goods?

A: Material test reports and dimension inspection reports can be offered for each order.

Q3: What surface treatments can be customized?

A: Blue‑white zinc, yellow zinc, black oxide and original stainless finish are optional.