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Shenzhen Screw Factory Taper Head Hexagon Socket Allen Titanium Bolts
Tel：
+86 13143444311
Email：sst@szsst88.com
Fax：+0086-755-27322278
Address：Building 9, First Industrial Zone, Tantou Industrial City, Songgang Street, Baoan District, Shenzhen 518105, Guangdong, China
Type:Titanium Bolts
Materials:Titanium
Surface treatment:Plain
Head Type:Taper (countersunk) head
Drive:Allen hex socket
Thread:Machine thread
Point:Plain, chamfered
Forming:CNC turning; socket cut
Size:M1 M2 M3 M4 M5 M6 M7 M8 M9 M10
We make titanium bolts with a taper head and a hexagon socket, quoted with the grade, cone angle and thread to the drawing. The cone seats on a thin edge that yields on titanium before the screw does, so the countersink and the assembly torque are agreed with the head.
Watch the factory video·Email sst@szsst88.com
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.
Titanium bolts are threaded fasteners turned from titanium bar, used where weight, corrosion resistance or magnetic behaviour matter. The part recorded here is a taper head bolt with a hexagon socket, plain titanium, quoted in metric sizes from M1 upward with the length made to the drawing.
Taper head. A conical head that seats in a matching countersink and finishes level with the surface.
Hexagon socket. A hexagon inside the cone, driven on the axis with a key.
Titanium body. About half the mass of steel for comparable strength, with no rust in ordinary conditions.
They are used in lightweight mechanisms and instruments where a flush head and a titanium body are both required. Titanium bolts in this form are also chosen where a magnetic part would disturb a sensor in the same assembly, so the material is as much a functional choice as the head form, and both are stated on the drawing.
A taper head seats on a narrow cone edge. That is its geometry: the cone meets the countersink along a ring, and the load is carried through that ring rather than through a wide flat face. In steel that ring is strong enough for the torque the socket can deliver. In titanium it is not always, because titanium has a lower modulus and yields earlier at a thin section.
The consequence is a failure mode that does not look like a fastener problem. Over-tighten a titanium taper head and the edge deforms, so the head sinks slightly into the countersink and the visible result is a ring-shaped depression in the customer part. The screw itself is undamaged and the joint is tight; the surface is deformed. On a visible panel that is the defect that matters.
The socket has the same thin-section problem at the other end. A hexagon cut inside a cone leaves thin walls at the small end, and the socket can transmit less torque than one in a cylindrical head. So the joint has two limits close together: the socket limits how much torque can be applied, and the head edge limits how much the joint can take.
That is why the countersink is part of the specification. A cone that matches the head spreads the seating load over the intended ring; a mismatch seats it on a line, and a line on a thin titanium edge deforms faster. The two errors compound: a small geometry error plus a little too much torque is enough to mark the panel.
The material’s galling behaviour completes the picture. Titanium threads can pick up and seize before the joint reaches its preload, and on a taper head the removal is harder than on a raised head because there is nothing to grip. The thread is therefore treated with a lubricant or a controlled fit where the joint is serviced.
The part is quoted to the drawing with the cone, the socket and the thread stated separately. Custom lengths up to 2,000 mm, subject to DFM review after drawing submission. The quotation for titanium bolts carries the grade, the head diameter and cone angle, the socket size and depth, the thread, the length and the countersink.
| Item | How it is defined | What we control |
|---|---|---|
| Cone | Taper head | Diameter, angle and edge thickness |
| Socket | Hexagon in the cone | Across flats and depth |
| Thread | Machine thread | Size, pitch and length |
| Grade | Titanium | Alloy and mechanical properties |
| Countersink | In the customer part | Angle and depth agreed |
| Torque | For the joint | Stated with the head edge in mind |
On titanium bolts the cone angle is written as a pair with the countersink. On a titanium taper head this is more than a seating detail, because a mismatch concentrates the load on an edge that deforms rather than springs back.
On titanium bolts the socket size is limited by the cone. On a small head there is little material at the top of the cone, and a socket that is one size larger removes the section that carries the key.
The thread and the mating part are agreed as a pair, and on titanium the galling question belongs with that agreement rather than with the finish.
Four properties decide titanium bolts of this form, and each one carries a cost:
| Property | What it gives | What it costs |
|---|---|---|
| Titanium body | Half the weight, no rust, no magnetism | Material and machining cost |
| Taper head | A flush joint | Thin edge that yields under torque |
| Hexagon socket | On-axis drive in a flush head | Less torque than a cylindrical socket |
| Plain finish | No coating in the socket or thread | Galling on titanium threads |
The value of a titanium bolt is a fixing that is light, does not corrode and finishes flush, on a mechanism where a raised head would foul something or show.
On titanium bolts the cost is a narrow torque window: the socket limits what can be applied and the head edge limits what can be taken, and on titanium bolts those limits are closer together than on a steel part of the same size.
The recorded finish is plain titanium. On a taper head that keeps the cone at its angle and the socket at its size, and it avoids a coating that would sit between the head edge and the countersink, where the load is carried.
| Option | How it protects | Effect on cone and socket | Typical use |
|---|---|---|---|
| Plain titanium | Natural oxide, no coating | Cone and socket as cut | Mechanical and marine parts |
| Anodised, clear | Oxide grown on the surface | No build; harder at the edge | Wear resistance |
| Anodised, coloured | Oxide, colour by thickness | No build; colour in the metal | Colour-coded visible parts |
| Dry film lubricant | Low-friction film | Thin; reduces galling | Serviced joints |
| Passivated | Cleaned passive layer | No build | Medical and food contact |
On titanium bolts a coating on the cone is a film under the head edge, which is where the seating load acts; on a thin titanium edge that film is another element that can be squeezed out unevenly. Plain titanium keeps the cone as machined.
Where the joint is serviced, a dry film lubricant is applied to the thread rather than to the cone. The cone is the seat, and the thread is the part that galls.
Three assemblies where a flush head and a light foot are both needed:
| Where it sits | The bolt is a pivot or a fixing inside a mechanism where a raised head would foul a moving part. |
| When it goes wrong | The head sinks into the countersink, or the joint seizes during service. |
| Why it happens | The countersink does not match the cone, and the torque is at the top of the range. |
| What we control | Cone and countersink checked; first article assembled and opened again. |
| Where it sits | The bolt holds a mount where the surface has to stay flat under a light that shows every mark. |
| When it goes wrong | A ring appears around the head, or the mount shifts. |
| Why it happens | The head edge deformed under torque, and the seat is no longer flat. |
| What we control | Cone and torque checked; first article inspected under the customer light. |
| Where it sits | The bolt closes a fitting that sees salt water and has to stay light. |
| When it goes wrong | The joint seizes after a season, or the head cannot be removed. |
| Why it happens | The grade is not suitable for chlorides, and the thread has no lubricant. |
| What we control | Grade confirmed on the certificate; first article exposed and inspected. |
Four reasons that matter on a taper head where the seat is a thin edge, each tied to something the drawing or the first article proves. All four show in the sample.
|
Cone angle and torque stated
The drawing states the cone angle and the assembly torque, because on titanium the head edge deforms before the screw does. Basis: Cone and torque agreed. |
Cone cut, then checked against the sink
The cone is finished and checked against a countersink of the specified angle, so the head seats on a ring rather than a line. Basis: Seat checked on a sink. |
|
Assembled and opened again
The first article is assembled and then removed, because a deformed head edge only shows in the joint and only after torque. Basis: Joint proved both ways. |
Same limits on repeat runs
Cone, socket and grade are recorded with the drawing revision, so a repeat batch seats the same way. Basis: Same limits across orders. |
These bolts are turned from titanium bar, with the taper head formed to its cone angle, the hexagon broached and the thread cut; the parts are cleaned and inspected. The first piece of every run is measured on head diameter and cone angle, edge thickness, socket across flats and depth, thread and length.
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|
The cone edge is the feature that decides the joint. It is turned to a defined thickness rather than left as a by-product of the angle, because a thin edge on titanium deforms under a torque that would be normal on steel. The edge is measured on the first piece and checked again on a sample from the end of the run.
The socket is cut after the cone is formed, so the hexagon stays in the thickest part of the head. On a taper head the walls around the socket thin quickly towards the top, so the depth is set rather than maximised.
The thread is cut and the parts are cleaned. Every batch is seated in a countersink of the specified angle, and a sample is tightened to the stated torque to confirm the head edge stays flat.
What decides whether titanium bolts pass is the cone, the head edge and the socket. The inspection agreement covers those, and the criteria come from the drawing.
Cone and edge on the projector |
Thread and start checked |
Material checked |
Salt-spray testing where a coating is used |
On titanium bolts the cone is measured for angle and diameter, and the edge for thickness. An edge that is thin for the drawing is a head that will deform in service under a torque the drawing allows, which is a defect that no single measurement shows.
The socket is measured across flats and for depth and checked with the key. On a taper head the socket is close to the cone, so a socket that is too deep leaves a thin section that distorts under a key.
A sample is seated in a countersink of the specified angle and tightened to the stated torque, then inspected for a ring-shaped mark. That test is the one that predicts what the customer’s panel will look like.
Every batch of titanium bolts is traceable to the bar it was made from. The grade, heat number and mechanical properties appear on the material certificate supplied with the parts, and the dimensional results are recorded against the drawing revision.
ISO 9001:2015 |
RoHS test report |
Registered trademark |
Patent: security screw and driver |
With each shipment we supply the material certificate, the inspection record for the dimensions on the drawing, including the cone and socket, and any finish record. The records carry the drawing revision and the batch number, so a repeat order of titanium bolts seats the same way.
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 a taper head the first article is seated in the customer countersink at the stated torque, because the head edge is what limits the joint. Buyers visit during the process to review samples.
|
8,678+
customers served
|
87%
of orders from repeat customers
|
56%
of orders through referrals
|
89
countries and regions shipped to
|
Repeat orders of titanium bolts are checked against the same first article, so a seat proved once is reproduced. Buyers and quality engineers visit for sample review, process discussion and supplier audits; the visit is arranged around production so the turning cell and the inspection bench 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 |
The cone seats on a thin edge. On titanium that edge deforms under torque before the screw does, and the deformation shows in the countersink.
No. The socket limits the torque and the head edge limits what the joint takes, and the two limits are close.
It does. A mismatch seats the head on a line, and a line on a thin titanium edge deforms faster.
Weight and no magnetism. Stainless is the answer where weight is not the driver.
They can. A lubricant or a controlled thread fit is specified where the joint is serviced.
Grade, cone angle and head diameter, socket size and depth, thread, length, and the countersink and torque.
How a titanium bolt project runs from drawing to repeat delivery:
|
1
Send the drawing and the countersink
|
→ |
2
Cone, socket and torque agreed
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→ |
3
First article seated and removed
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→ |
4
Batch production and repeat orders
|
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 grade, cone angle and head diameter, socket size and depth, thread, length, the countersink and the assembly torque.
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Grade
|
Cone angle
|
Head diameter
|
|
Socket
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Thread
|
Torque
|
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
