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Gallery

Gallery

Inside our factory — equipment, processes and finished parts

Real photos from our plant — hardening, rainbow/white/blue/black zinc plating, phosphate coating and in-house lab testing across a wide range of small parts: screws, nuts, bolts, washers and fasteners. Every image reflects the surface quality and lot-to-lot consistency our customers actually receive.

The company signboard on the front of the plant building: the VS logo at left, the Thai company name, the English name V.S. HEAT TREATMENT CO., LTD., and the street number and telephone number below.
Factory
Thousands of screws spread in one even layer across a wire mesh conveyor belt, moving toward the mouth of a continuous hardening furnace.
Equipment
Samkoon touchscreen HMI for "Hardening furnace 2": a mimic diagram of the continuous line above three carburizing zones reading 870–893 °C against an 890 °C setpoint and three tempering zones reading 185–186 °C against 180–190 °C.
Equipment
A wall-mounted HMI touchscreen on its “Carbon Atmosphere” page, listing carbon potential, set point, probe millivolts and probe temperature, with PV and SP bar graphs alongside.
Equipment
Green control cabinet of a continuous carburizing furnace built by San Yung Electric Heat (Taiwan): ammeters, selector switches, a temperature chart recorder and digital controllers reading 875, 886 and 891 °C against an 890 °C setpoint.
Equipment
A white twin-door industrial baking oven standing on the plant floor, with a digital temperature controller and status lamps on its right-hand panel.
Equipment
Inside an open baking oven: perforated stainless trays stacked in a rack, each spread with a thin layer of small screws.
Equipment
A technician in a V.S. Heat Treatment polo shirt seated at a bench-top micro-Vickers hardness tester, the monitor beside it showing a magnified indentation, with a results logbook open on the desk.
Laboratory
A quality-control station: a bench hardness tester, one monitor showing the magnified indentation and a second showing the results spreadsheet, with keyboard and barcode scanner, at a window overlooking the production floor.
Laboratory
A heap of hex flange bolts on a white surface, zinc plated with a bright iridescent finish — blue, violet and green shifting across the heads and flanges.
Sample parts
Dozens of hex flange bolts heaped on a white surface, bright zinc plated in a blue-violet tone, with the threads and the flange under each head clearly visible.
Sample parts
Five dark grey Phillips bugle-head screws standing on graph paper, their thread pitch and points clearly visible.
Sample parts
The wood-framed trough of a phosphating line, its rollers loaded with a mass of matte black screws still wet from the bath.
Sample parts
Sample screws, nuts and bolts laid out in rows on a white background — black and bright zinc finishes, several head types and lengths — with hex nuts arranged below to form the letters V and S.
Sample parts
The V.S. Heat Treatment company truck parked inside the plant, one worker guiding painted steel drums onto the flatbed on an overhead chain hoist while another works the hoist’s pendant control.
Factory
Close-up of a furnace mouth: an orange flame streaming out above the belt, which is covered with small steel parts.
Equipment
A plating line seen down its length: process tanks in two rows either side of a walkway, with an overhead hoist rail for moving baskets from tank to tank.
Equipment
A gloved hand lifting small steel parts from the rim of a process tank on the plating line.
Equipment
A shallow-depth-of-field close-up of bright zinc-plated pan-head Phillips screws scattered on a glossy surface, catching blue-white highlights.
Sample parts
A shallow-depth-of-field close-up of dark grey Phillips-head self-tapping screws heaped together.
Sample parts
A stream of small steel parts tumbling off the end of a conveyor belt in a dimly lit part of the plant.
Equipment

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