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+86 13143444311
Email：sst@szsst88.com
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Address：Building 9, First Industrial Zone, Tantou Industrial City, Songgang Street, Baoan District, Shenzhen 518105, Guangdong, China
Type:Titanium button head screw, ISO 7380
Materials:Titanium
Surface treatment:Plain, passivated
Head Type:Button head
Size:M6*8
Drive type:Torx (internal)
Thread feature:Machine thread
Forming:Cold heading with formed Torx recess; thread rolled, then passivated
Number:895
We manufacture titanium button head screws to the ISO 7380 button head envelope, including the recorded M6 x 8 mm part, cold headed with a Torx recess, thread rolled and supplied plain and passivated. Grade, recess size, thread fit and length are taken from your drawing.
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ISO 9001:2015 · Manufacturing since 1998 · 8,678+ customers · 89 countries and regions
Made to order – there is no stock catalogue. Each part is produced to your drawing, and production starts after drawing review and first-article approval.
A titanium button head screw is a machine screw with a low domed head and a Torx drive, made from titanium rather than steel. The recorded item on this page is M6 x 8 mm to the ISO 7380 button head envelope, in commercially pure titanium, supplied plain with no coating. The alloy is the reason for the part: it is about half the weight of steel and it does not need a coating to survive chlorides.
Titanium body. Titanium forms its own oxide film in air within moments of being cleaned, and that film is what stops the metal from corroding. It reforms if the surface is scratched, which is why a titanium screw can be supplied plain in seawater service where a plated steel screw would fail at the first scratch.
Button head. A shallow dome with a flat bearing face, low enough to sit inside a recess and wide enough to spread the clamp load on a thin panel. The profile is also aerodynamic and easy to clean, which matters on exposed marine hardware.
Torx drive. A six-lobed recess rather than a hex socket. On titanium this matters more than on steel, because titanium galls against tooling: a drive that spreads the load over a larger contact area is less likely to seize the bit or deform the recess.
Light for its strength. At 4.5 g/cm³ titanium is roughly 43% lighter than steel for the same volume, so a screw of this size is used where the fastener weight is part of the design, as on a moving assembly or a bracket that is counted against a payload.
Together these decide the part: the alloy resists the environment without a coating, the light body keeps the assembly light, the Torx recess takes the torque without galling, and the button head fits the clearance. That is why a titanium button head screw is specified by grade, head, drive and thread together.
The body of this titanium button head screw is titanium wire, with the grade and heat number kept with the batch record. The grade is fixed on the drawing because the two common choices behave very differently: commercially pure titanium is ductile and highly corrosion resistant, while the alloyed grade is considerably stronger and is chosen where the joint has to carry load.
The button head and the Torx recess are formed in one heading operation. Titanium work-hardens as it is formed and it does not flow as easily as carbon steel, so the die and the cut length are set for the grade rather than for a generic screw of the same size.
The thread is rolled. Rolling suits titanium because it works the surface rather than cutting through it: the flank is smoother, there is no burr at the end, and the worked surface is harder than the core, which reduces the galling that a cut titanium thread shows when it meets a mating thread.
Titanium galls against itself. Two titanium threads turned together can seize and cold-weld before the joint is tight, so the thread fit and the surface condition are part of the specification, and a lubricant or an anti-seize is named on the drawing where the joint will be assembled dry.
The finish is plain. There is nothing to add: the passive film does the work, and a coating would sit on top of the one surface the alloy needs exposed. The parts are cleaned and passivated, and that is the condition they ship in.
Titanium button head screws of this type are quoted to the ISO 7380 button head envelope and in metric sizes; the recorded item is M6 x 8 mm, fully threaded. Other diameters and lengths are made to drawing, and a length that falls outside the standard set is reviewed before it is quoted, because titanium adds cost quickly with size.
| Item | How it is defined | What we control |
|---|---|---|
| Head diameter and height | The low dome that bears on the panel | Checked on the projector on the first article |
| Torx recess size | Which bit the head takes | Checked with the matching bit |
| Recess depth | Material left under the bearing face | Checked on the first article |
| Thread size and pitch | The fit in the tapped hole | Gauged per batch |
| Length | From under the head to the tip | Measured on the shop plate |
| Grade | The titanium the part is made from | Confirmed against the material certificate |
Each size is quoted against the joint it closes. The head diameter, the clearance in the panel and the thread engagement are reviewed together, because the head is the part that decides whether the screw sits inside the recess or stands proud of it.
Length is measured from under the head, and the thread is gauged in the condition it ships in. On a plain titanium part that is the finished condition, so the gauge reading is the fit the customer receives, with no coating thickness to allow for.
The Torx recess is the feature that makes titanium workable in assembly. Titanium galls, and a drive with a small contact area concentrates the load until the recess deforms or the bit seizes. The six lobes spread the torque across a larger face and let the bit release cleanly after tightening.
| Parameter | Why it matters on this part | What we control |
|---|---|---|
| Recess size | Bit fit and torque capacity | Matched to the head; checked with the bit |
| Recess depth | Material under the bearing face | Checked on the first article |
| Head height | Clearance in a recess | Measured from the bearing face |
| Thread fit | Galling risk in assembly | Set on the drawing; gauged per batch |
| Surface condition | Consistency of the passive film | Cleaned and passivated before packing |
Galling is not a defect in the part, it is a property of the metal. Two titanium surfaces under pressure can transfer material from one to the other and seize. The countermeasures are in the drawing: a thread fit with a little more clearance, a rolled rather than cut thread, a machined or polished bearing face, and an anti-seize where the customer assembles dry.
The button head suits titanium because it removes material from the head rather than adding it. A low head means less titanium in the part, and titanium is expensive per kilogram, so the head profile is not only a clearance decision but a cost one.
The short M6 x 8 mm screw is fully threaded and clamps a thin stack. On a titanium part that is often a bracket, a cover or a plate on a marine or chemical assembly, where the screw is chosen for the environment rather than for the load.
This titanium button head screw is supplied plain, cleaned and passivated. The passive oxide film is the finish: it forms in air, it reforms after damage, and it needs no thickness allowance in the thread or the recess.
| Finish | How it protects | Effect on thread and recess | Typical use |
|---|---|---|---|
| Plain, passivated titanium | Native oxide film, self-repairing | No build-up; thread as rolled | Marine, chemical and medical assemblies |
| Anodised (Type II / III) | Thickened oxide, colour possible | A few microns; thread re-checked | Visible parts where colour is specified |
| Bead blasted | Uniform matte surface | No dimensional change | Parts where glare must be removed |
| PVD coating | Hard ceramic film over the oxide | Thin but hard; recess re-checked | Wear faces and coloured hardware |
| Anti-seize applied at assembly | Not a part finish | No change to the part | Titanium-to-titanium joints assembled dry |
Salt-spray exposure is agreed per project and written on the drawing. Plain titanium is tested in the condition it ships in and it is expected to pass far beyond the hours a plated steel part would survive, which is the reason it is chosen for seawater and chloride service.
Packing protects the threads and keeps the parts clean. Titanium parts are bagged in counted quantities, labelled with the batch, the grade and the heat, and the bags are kept closed until assembly so the surfaces do not pick up contamination from handling.
Three environments where the alloy, not the strength, is the reason for the part:
Marine and offshore hardware
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Titanium screws on offshore marine hardware |
Chemical and process plant
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Fasteners on a chemical process plant frame |
| Where it sits | The screw holds a housing, a handle or a bracket on an instrument that is cleaned and disinfected repeatedly. |
| When it goes wrong | A corroding fastener traps residue and fails sterilisation, and a magnetic screw interferes with the instrument or the imaging around it. |
| Why it happens | The part is cleaned with chemicals, the assembly is small, and the material has to be non-magnetic. |
| What we control | Grade confirmed on the certificate, the plain surface checked for contamination, and the thread gauged for the mating part. |
Four reasons that matter on a small titanium part, each tied to what the drawing has to prove:
|
Grade and joint reviewed first
The titanium grade, the thread fit and the anti-seize question are reviewed before tooling, so a part that would gall in assembly is raised first. Basis: Grade, thread fit and assembly reviewed before tooling. |
Headed and rolled in one route
The button head and the Torx recess are formed in the heading die and the thread is rolled, so the recess stays concentric and the flank stays smooth. Basis: One route from wire to finished titanium screw. |
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Recess and thread checked on the part
The recess is driven with the matching bit and the thread is gauged, on the first article, in the grade the part is actually made from. Basis: Recess and thread checked on the first article. |
First article to repeat production
The first article fixes the drawing revision, titanium heat, die set and thread roll; repeat orders are compared against that record. Basis: First article signed off before the batch is released. |
Shi Shi Tong forms these titanium button head screws on a heading machine that upsets the low dome and forms the Torx recess in one operation, then rolls the thread and cleans and passivates the parts. The first part of every run is measured on the head and the recess, driven with the matching bit and gauged on the thread, before the batch continues.
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Titanium is less forgiving than steel in the die: it work-hardens as it is formed and it does not flow the same way, so the setting is made on the grade and checked on the first part rather than adjusted during the run. The parts are kept in covered trays between operations so the surfaces stay clean before passivation.
What decides whether a titanium button head screw passes is the head diameter and height, the recess size and depth, the thread class and the surface condition. The inspection agreement covers those, and the criteria come from the drawing and the accepted sample.
Head and recess on the projector |
Thread gauging against GO/NO-GO gauges |
Hardness testing where the drawing requires it |
Salt-spray testing of the plain titanium part |
Each batch is recorded against the drawing revision: head and recess from the first article, the thread gauged per batch, and the grade confirmed on the material certificate. If a bit or the recess check fails, the parts back to the last good setting are held and re-checked.
An outside report on the material, where the drawing asks for one, is filed with the batch so the paperwork and the parts share one batch number.
Every shipment of titanium button head screws is traceable to the wire it was made from. The grade, heat number and standard are recorded on the material certificate supplied with the parts, and the inspection records follow the criteria agreed on the drawing.
ISO 9001:2015 |
RoHS test report |
Registered trademark |
Patent: security screw and driver |
With each batch we supply the material certificate, the inspection record for the criteria on the drawing and, where it is listed, the third-party report for the material. The documents carry the drawing revision and the batch number, so the paperwork can be matched to the parts.
More than 8,678 customers in 89 countries and regions have ordered from Shi Shi Tong; 87% of orders come from repeat customers and 56% through referrals. Most projects follow the same route: drawing review, first-article approval, then batches checked against that sample. On titanium parts the first article is driven with the customer’s bit and checked against the mating thread, because galling shows up in assembly rather than in the tray. Buyers visit during the process to review samples and to see how the heads are formed.
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8,678+
customers served
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87%
of orders from repeat customers
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56%
of orders through referrals
|
89
countries and regions shipped to
|
Buyers and quality engineers visit for sample review, process discussion and supplier audits; the visit is arranged around production so the header and the inspection room can be seen on the day the parts run.
Customer group visit – sample review |
Customer group visit – process discussion |
Customer group visit – factory tour |
Customer visit – project kick-off |
Danish customer – drawing review |
Industry exhibition – meeting customers |
It is a machine screw with a low domed head and a Torx drive, made from titanium instead of steel. This one is M6 x 8 mm to the ISO 7380 button head envelope, in commercially pure titanium, supplied plain and passivated.
Commercially pure titanium is ductile and highly corrosion resistant and suits most marine and chemical joints; the alloyed grade is much stronger and is chosen where the joint carries load. The grade is stated on the drawing and confirmed on the material certificate.
Because titanium galls. A drive with a larger contact area spreads the torque and is less likely to deform the recess or seize the bit, which is why a six-lobed recess suits the metal.
No. Titanium forms a self-repairing oxide film in air, so a plain passivated part is the normal supply condition for marine and chemical service. Coatings are used only when a colour or a wear face is specified.
Yes. Titanium galls against itself, so two titanium threads can cold-weld under pressure. The drawing sets the thread fit, and where the joint is assembled dry an anti-seize is specified.
Head diameter and height, Torx recess size, thread size and pitch, length and datum, titanium grade, finish, the mating thread, and whether an anti-seize is applied at assembly.
How a titanium button head screw project runs from drawing to repeat delivery:
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1
Send the drawing or sample
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→ |
2
Grade, thread fit and head review
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→ |
3
First article in the assembly
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→ |
4
Batch production and repeat orders
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Each step is confirmed with you before the next one starts; the drawing revision from the first article is what repeat orders are checked against.
For a quotation, send the drawing with the head diameter and height, Torx recess size, thread size and pitch, length and its datum, titanium grade, finish, the mating thread, and whether an anti-seize is applied at assembly.
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Head diameter and height
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Torx recess size
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Thread size and pitch
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Length and datum
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Titanium grade
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Mating thread and assembly
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Sending a drawing? The form below does not take attachments. Email the PDF, DXF or STEP file to sst@szsst88.com with the part name and quantity in the subject line – the drawing is reviewed and a quotation follows.
+86 13143444311
sst@szsst88.com
