What we make
Custom screwsCustom screws and custom bolts made to your drawing: special heads, captive and sems screws, micro screws and special materials and finishes. How to choose the process and what to specify.Shoulder boltsCustom shoulder bolts (shoulder screws) with special shoulder diameters, lengths and tolerances, threads, materials and finishes. Standard vs custom, how they are made and what to specify.Titanium boltsCustom titanium bolts and screws in Grade 2 and Grade 5 (Ti-6Al-4V): strength and weight, galling precautions and anodized colors — made to your drawing.Cold headingThe cold heading process and thread rolling for high-volume custom screws and bolts: process steps, cold heading vs machining, why rolled threads are stronger and when volume production makes sense.
How FastenSmith works
FastenSmith is the custom fastener service of Dongguan Huasheng Precision Technology (Huasheng Precision), a CNC machining manufacturer in Dongguan, China. We choose the process to suit quantity and geometry: cold heading and thread rolling at partner fastener factories for volume, and CNC turning in-house or with partners for low volumes and shapes that cannot be headed.
| Process | Best for |
|---|---|
| Cold heading + thread rolling | Special head shapes at volume (thousands to hundreds of thousands) |
| CNC turning / mill-turn | Prototypes, low volumes, large diameters, precision shoulders |
| Turning + rolling | Precision shanks turned, threads rolled for strength |
Typical specifications
| Item | Options |
|---|---|
| Threads | Metric coarse and fine, UNC / UNF, pipe threads, thread-forming — as drawn |
| Materials | Carbon and alloy steel, stainless (304, 316, 410…), titanium, brass, aluminum |
| Property classes | 4.8, 8.8, 10.9, 12.9; stainless A2-70, A4-80 — per drawing and standard |
| Finishes | Zinc with trivalent passivation, black oxide, nickel, zinc flake, passivation, titanium anodizing |
| Documents | Mill certificates, dimensional reports, RoHS — scope confirmed at quotation |
Feasibility depends on material, size and quantity and is confirmed from the drawing.
Guides
Types of screwsTypes of screws and bolts explained: machine screws, hex bolts, socket head cap screws, thread-forming screws and set screws, plus head styles, drive types and thread types.Bolt property classesWhat bolt property classes 4.8, 8.8, 10.9 and 12.9 mean, how to read tensile and yield strength from the numbers, stainless steel classes A2-70 and A4-80, and selection notes.Fastener finishesCommon fastener finishes compared — zinc plating with trivalent passivation, black oxide, nickel, zinc flake and passivation — plus hydrogen embrittlement and thread-fit notes.
How a project runs
- Send the drawing — thread size and length, material, property class, finish and quantity.
- Review — we confirm the process (headed or turned), how threads are made and inspection methods.
- Quotation — any tooling cost is shown separately from the piece price.
- Samples — first pieces checked for dimensions, thread gauges and appearance.
- Production and shipping — bag counts, labels and shipping confirmed per order.