NXF UNS A36 S235JR/St37-2/SS400 Carbon Steel Color Galvanized Hex Flange Sleeve Expansion Anchor Bolt Full Sizes Available

1.Raw Material CuttingAdopt Q235 carbon‑steel wire rod as raw‑stock. Cut steel materials into fixed‑size blanks in accordance with each finished‑bolt specification.

2.Cold‑Heading FormingCarry out cold forging on one end of steel blank to mold the integrated hex‑flange head, then remove sharp burrs.

3.Expansion Sleeve StampingCut carbon‑steel pipe into fixed‑length sleeves, punch longitudinal expansion slits on the sleeve wall for later opening‑and‑gripping.

4.Thread RollingProcess standard external threads on bolt studs via thread‑rolling machine, inspect thread tolerance to ensure smooth screwing.

5.Parts Cleaning‑UpClean oil contamination, metal scraps and surface impurities from sleeves, bolts and flat washers.

6.Component AssemblyAssemble threaded rod, expansion sleeve and matched flat washer into complete sleeve‑anchor assemblies.

7.Color Zinc‑Galvanized Surface TreatmentComplete electroplating for whole‑batch goods. The colored zinc coating provides rust‑proof and anti‑corrosion property.

8.Finished‑Product InspectionTest overall dimension, hex‑head size, drill‑in diameter, thread condition and plating‑layer thickness; eliminate defective items.

9.Sorting and PackingClassify qualified anchors by M6, M8, M10 specifications, then pack them for storage and delivery.