
V.S. Heat Treatment
Heat treatment & metal finishing experts

V.S. Heat Treatment
Heat treatment & metal finishing experts

Finishing for small parts — screws, nuts, bolts, washers and all hardware — for factories and shops in Amata City Chonburi. ISO 9001:2015 with salt-spray test certificates.
Amata City Chonburi is a major industrial zone in Chon Buri (Eastern Thailand), home to automotive & parts, electronics, machinery. V.S. Heat Treatment supplies the small-part finishing these factories rely on — hardening, Cr3+ zinc plating, phosphate coating and lab testing for screws, nuts, bolts and washers — shipped from our nearby Samut Sakhon plant with test certificates on every lot.

Processes built specifically for screws, nuts, bolts and washers — minimizing parts sticking together, clogged threads and uneven coating.
Pickup and delivery to plants in Amata City Chonburi through partner carriers, on time, with full piece counts on every lot.
Every job ships with hardness (HRC) and salt-spray results to ASTM B117, ready to pass on to your end customer.
Choose plating color, coating thickness and hardness level to match how the part is actually used.
Every plating and heat-treatment process under one roof

Bolts

Nuts

Screws

Anchor bolts

Washers

Pins

The distance from Amata City Chonburi 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.
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.
Yes — flexible minimums suit both mass production and sample/small lots. Contact us for a quote based on your real volume.
Yes. Every lot includes hardness and salt-spray (corrosion) results under our ISO 9001:2015 system.
It depends on part type and volume, including transit to and from Amata City Chonburi — contact our team to agree on a delivery schedule.
Get a free quote. Fast replies and advice on the right finish for your parts.