Zinc Plating • Heat Treatment • Phosphating in Saraburi
Finishing for small parts — screws, nuts, bolts, washers and all hardware — for factories and shops in Saraburi. ISO 9001:2015 with salt-spray test certificates.
We run one plant, and it is in Samut Sakhon. This page covers collection and delivery for customers in Saraburi — it is not a branch or a facility in Saraburi.
Customers in Saraburi can send work to V.S. Heat Treatment any business day. We specialize in high-volume small parts such as screws, nuts, bolts, washers, pins and rivets, with capacity up to 2,000 tonnes per month and in-house lab quality control on every lot.
Why factories in Saraburi choose us
Small-part specialists
Processes built specifically for screws, nuts, bolts and washers — minimizing parts sticking together, clogged threads and uneven coating.
Nationwide delivery
Pickup and delivery to plants in Saraburi through partner carriers, on time, with full piece counts on every lot.
Certified results
Every job ships with hardness (HRC) and salt-spray results to ASTM B117, ready to pass on to your end customer.
Tunable specs
Choose plating color, coating thickness and hardness level to match how the part is actually used.
Services for Saraburi customers
Every plating and heat-treatment process under one roof
The distance from Saraburi to our plant in Samut Sakhon is no obstacle. Most customers use parcel freight or their own factory transport. We help coordinate logistics and report job status at every step — contact our team to plan a pickup/delivery cycle that fits your volume.
FAQ — Saraburi
How do you handle work from Saraburi?+
Send parts via parcel freight or your factory transport to Samut Sakhon. Once finished, we ship them back with test certificates. Ask about pickup cycles via LINE or phone.
Do you accept small low-volume jobs?+
Yes — flexible minimums suit both mass production and sample/small lots. Contact us for a quote based on your real volume.
Do you provide quality certificates?+
Yes. Every lot includes hardness and salt-spray (corrosion) results under our ISO 9001:2015 system.
How long does it take?+
It depends on part type and volume, including transit to and from Saraburi — contact our team to agree on a delivery schedule.
Nearby provinces in Central Thailand
About this province
What is manufactured here
The factory mix concentrated in this province decides which finishes get ordered most.
- construction materials & cement
- steel & metalworking
- general manufacturing & SMEs
Named estates and factory districts
Real place names in the province. IEAT-designated estates are marked.
- หนองแค
- แก่งคอย
Parts we most often take from this area
สลักเกลียว · น็อต · แอนเคอร์โบลต์ · ชิ้นส่วนเครื่องจักร
What work from this province has to meet
These figures come from the industries concentrated here, not from a national average.
| Property class | Salt spray | Hardness | Materials seen | Standards | |
|---|---|---|---|---|---|
| Construction & Structural | 4.8 / 8.8 | 96–480 h NSS | ≤ ~30 HRC | Q235, S45C, carbon steel | ISO 898-1 · ISO 4042 · ASTM |
| Steel Structure & Fabrication | 8.8 / 10.9 · nuts class 8 / 10 | 240–720 h NSS | 22–32 HRC (8.8) · 32–39 HRC (10.9) | SS400 / Q235, S45C, SCM435, SWCH10B33 | ISO 898-1 · ISO 898-2 · ISO 4042 · ASTM B633 |
| Fastener Manufacturers — Toll Processing | bolts 4.8–12.9 · nuts class 8 / 10 / 12 | to the number your own customer specifies | the class band, plus a surface-versus-core comparison | SWCH10B21, SWCH10B33, SCM435, SCr440, S45C | ISO 898-1 · ISO 898-2 · ISO 6157 · ISO 4042 |
Failure modes to watch on this kind of work
Questions we get from this province
- We are in หนองแค — can you take our work?
- Yes. We take work from factory districts across Saraburi — หนองแค, แก่งคอย among them — not only from designated estates. Parts travel by our own vehicles or by parcel freight, with a flexible minimum for small lots and samples.
- What specification does work from Saraburi usually have to meet?
- It follows the local industry mix. For Construction & Structural, common in Saraburi, the usual call-out is property class 4.8 / 8.8, hardness ≤ ~30 HRC and 96–480 h NSS corrosion resistance, on Q235, S45C, carbon steel.
- What hardness do the grades from Saraburi reach?
- The grades seen most from this area are S45C, SWCH10B21, SCM435, SWCH10B33, SCr440. Attainable hardness varies with grade and section, and the value specified in service after tempering is always below the as-quenched ceiling — the per-grade pages carry both numbers.