Photograph of the saucer head bolts range. This page covers the M8 × 70 mm size, head 16 mm dia, 5 mm high.
Titanium Saucer Head Bolts
Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*70
A low profile saucer head with a flanged bearing face in Ti-6Al-4V Grade 5 titanium, M8 thread, 70 mm long under the head, head 16 mm dia, 5 mm high and a T40 Torx recess.
Listed unit price. Email us with the quantity for a full quotation.
Specifications
Full Specification
| Product name | Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*70 |
|---|---|
| SKU | TiSHS870 |
| Material | Ti-6Al-4V titanium, ASTM Grade 5 |
| UNS number | R56400 |
| Thread | M8 |
| Length under head | 70 mm |
| Head style | Low profile saucer head with a flanged bearing face |
| Drive | Torx T40 |
| Head diameter | 16 mm |
| Head height | 5 mm |
| Torx size | T40 |
| Finish | Plain titanium, as machined |
| Magnetic response | Non magnetic |
| Availability | In stock |
| Price per piece | $2.00 |
Dimensions are the values listed for this size. Send a drawing if you need a dimension checked against a tolerance.
Overview
Where It Fits
The same low saucer head profile carried up into the larger M8 and M10 diameters. The M10 sizes in this range are cut with a 1.25 mm fine pitch rather than the coarse pitch, which is the pitch commonly specified for M10 fasteners on vehicle and machine assemblies.
Problems It Solves
- Larger diameter joints that still need a low head and a wide bearing face
- M10 positions that call for a fine 1.25 mm pitch rather than the coarse pitch
- Weight reduction on the larger fasteners of an assembly where the mass saving is highest
- Bearing faces against aluminium or composite where a small hex head would dig in
Typical Application Areas
- Motorcycle and bicycle assemblies — brake calipers
- Motorsport and performance vehicles — suspension
- Marine and offshore fittings — deck fittings
- Chemical and process equipment — covers
- Electronics and instruments — housings and mountings near sensors and imaging equipment
Material
Ti-6Al-4V Grade 5 Reference Data
Published values for the alloy and for ASTM B348. They describe the material, not a batch certificate.
| Alloy designation | Ti-6Al-4V, ASTM Grade 5 |
|---|---|
| UNS number | R56400 |
| Nominal composition | 6 percent aluminium, 4 percent vanadium, balance titanium |
| Alloy class | Alpha beta alloy |
| Density | 4.43 g/cm³ |
| Minimum tensile strength | 895 MPa / 130 ksi |
| Minimum yield strength | 828 MPa / 120 ksi |
| Minimum elongation | 10 percent |
| Modulus of elasticity | About 114 GPa |
| Magnetic response | Non magnetic |
| Melting range | About 1604 to 1660 °C |
Why Titanium For This Joint
Weight
Titanium has a density of about 4.43 g/cm³ against about 7.85 g/cm³ for steel. Swapping a steel fastener for the same size in Ti-6Al-4V removes roughly 44 percent of the mass of that fastener.
Strength
ASTM Grade 5 is specified with a minimum tensile strength of 895 MPa and a minimum yield strength of 828 MPa, so the strength is in the range of a medium strength alloy steel rather than of aluminium.
Corrosion
Titanium carries a stable oxide film that re-forms as soon as it is damaged in air or water. It resists seawater and chloride environments that pit and crevice corrode common stainless grades.
Non magnetic
Titanium and its alloys are non magnetic, which matters around sensors, imaging equipment and magnetically sensitive instruments.
Size Ladder
Other Lengths In M8
Same head geometry and the same drive, in every length we hold for this thread size.
| Product | SKU | Length | Price / pc |
|---|---|---|---|
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*12 | TiSHS812 | 12 mm | $1.00 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*16 | TiSHS816 | 16 mm | $1.00 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*20 | TiSHS820 | 20 mm | $1.00 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*25 | TiSHS825 | 25 mm | $1.20 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*30 | TiSHS830 | 30 mm | $1.20 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*35 | TiSHS835 | 35 mm | $1.50 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*40 | TiSHS840 | 40 mm | $1.50 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*45 | TiSHS845 | 45 mm | $1.50 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*50 | TiSHS850 | 50 mm | $1.50 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*55 | TiSHS855 | 55 mm | $1.50 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*60 | TiSHS860 | 60 mm | $1.50 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*70 | TiSHS870 | 70 mm | $2.00 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*80 | TiSHS880 | 80 mm | $2.00 |
| Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*90 | TiSHS890 | 90 mm | $2.00 |
Comparison
Other Head Styles In M8
The same thread size in the other ranges we stock, so the head profile and the drive can be chosen for the joint.
| Range | Head | Drive | Head size | Lengths |
|---|---|---|---|---|
| Socket Head Cap Screws | Cylindrical cap head | Torx T40 | Head 13 mm dia, 8 mm high | 15–90 mm |
| Saucer Head Bolts | Low profile saucer head with a flanged bearing face | Torx T40 | Head 16 mm dia, 5 mm high | 12–90 mm |
Use Guide
Fitting This Fastener
Use anti seize on the threads
Titanium galls readily against titanium and against stainless. A dry film or copper free anti seize on the thread and under the head keeps the torque to tension relationship predictable and lets the joint be broken later.
Torque to a titanium figure not a steel figure
Do not carry over a torque value from a steel or stainless fastener of the same size. The friction behaviour is different and the safe clamp load has to be set for the alloy and for the lubricant actually used.
Seat the drive fully before applying load
Push the Torx key or the socket right to the bottom of the recess before turning. A partly seated drive concentrates load on the top edge of the recess.
Watch galvanic pairings
Titanium is a noble metal. Where it is bolted directly to aluminium or magnesium in a wet environment, isolate the joint or accept that the lighter metal will carry the corrosion.
Keep the bearing face clean and flat
A wide flange or saucer face only works if it lands on a flat clean surface. Swarf or paint under the head shifts the clamp load off centre.
FAQ
Questions About This Size
What is the head size of the Gr.5 Ti6Al4V Titanium Bolt Saucer Head M8*70
What titanium grade is it
What tool does it take
How much lighter is it than the same size in steel
Do I need anti seize
Is a different length available in this thread size
What does it cost
Quote This Size
Send the quantity and we will come back with a price and a lead time. Other lengths and head styles are on the same terms.
Email [email protected]