Tantalum Socket Head Cap Screws
Tantalum Socket Head Cap Screws are best known for its unmatched corrosion resistance and chemical inertness. Tantalum Socket Head Cap Screws have a similar corrosion resistance to that of glass, but all of the typical mechanical and electrical properties of a metal.
Tantalum Socket Head Cap Screws are also extremely stable at high temperatures, since tantalum has a melting point around 3000°C. High temperature applications require vaccum or inert gas since tantalum may embrittle when used in oxygen rich environments above 250°C. Tantalum Socket Head Cap Screws are also one of the most bio-compatible metals available and is also radio-opaque due to its high density (16.68 g/cm3).
All tantalum Socket Head Cap Screws are available in commercially pure tantalum and tantalum 2.5% tungsten (Ta-2.5%W).
When nickel, titanium or zirconium alloys are not enough...
Immune to numerous acids and chemicals (corrosion tables)
Better corrosion resistance than nickel alloys, titanium or zirconium
High strength and stiffness in vacuum and inert gas up to 2000°C (3600°F)
Can become brittle when used in oxygen above 300°C
High purity and biocompatibilty
Physical Properties
Tantalum's Chemistry Grades & Specs
Datasheet for tantalum
Resources: Tantalum Torque Spec
Tantalum Socket Head Cap Screws Types: Button Head Cap Screws, Flat Head Screws, Hex Cap Screws, Pan Head Screws, Set Screws, Socket Head Cap Screws, Tamper Resistant Security Screws,
Custom Availability
Diameter sizes: Standard #00 – 4” in diameter / Metric M1.2 – M100
Threads: UNC, UNF, UNJ, UNR, Rolled,Cut
Minimum Volume – Typically 10pcs, depending on size and stock
Custom to print
Tantalum Fastener Styles
| Tantalum Screws | 12 Point Screws Button Head Cap Screws Flat Head Screws Hex Head Cap Screws Pan Head Screws Security Screws Set Screws Socket Head Cap Screws Vented Screw | • DIN 603 / ISO 8677 • DIN 912 / ISO 4762 • DIN 913 / ISO 4026 • DIN 914 / ISO 4027 • DIN 915 / ISO 4028 • DIN 916 / ISO 4029 • DIN 921 • DIN 931 / ISO 4014 • DIN 933 / ISO 4017 • DIN 961 / ISO 8676 • DIN 965 / ISO 7046 • DIN 966 / ISO 7047 • DIN 7991 / ISO 10642 • DIN 7380 / ISO 7380 • DIN 84 / ISO 1207 • DIN 85 / ISO 1580 • DIN 34822 • DIN 34821 • DIN 7504 / ISO 15480 • DIN 7984 • DIN 963 / ISO 2009 |
| Tantalum Bolts | Hex Head Bolts Shoulder Bolts Wedge Anchor Bolts | • DIN 931
• DIN 933
• ISO 4014
• ISO 4017
• ISO 7370 |
| Tantalum Nuts | Hex Nuts Lock Nuts | • DIN 439 / ISO 4035
• DIN 934 / ISO 4032
• DIN 985 / ISO 7040
• DIN 986
• DIN 980 / ISO 7042 / ISO 19513
• DIN 6923 / ISO 4161 |
| Tantalum Studs/Rod | Studs Threaded Rod Weld Studs | • DIN 975
• DIN 976 |
| Tantalum Washers | Flat Washers Lock Washer | • DIN 125 / ISO 7089 / ISO 7090
• DIN 126 / ISO 7091
• DIN 127 / ISO 7090
• DIN 9021 / ISO 7093 |
| Tantalum Hose Clamps | Medium Duty Hose Clamps |
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Tantalum Screws
12 Point Screws | Tantalum 12 point screws allow for higher torque to be applied than a socket head cap screw or head head bolt, however they are be less economical due to the complex head design. Available in 1/4" or larger sizes. | • IFI-115
• MIL SPEC
• DIN 34822
• DIN 34821 |
Button Head Cap Screws | Tantalum button head screws offer a wide clamping area and low profile. They are best for fastening material that is too thin to counter bore. | • ASME B18.3
• ASME 18.3.4M
• DIN 7380 / ISO 7380 |
Flat Head Screws | Tantalum flat head screws are most commonly offered in an 82° countersink angle, but can be customized to other angles from 60° -120° and are designed to be flush with the surface. Available in slotted and socket drivers. Phillips, 6-lobe, torx and tamperproof drivers in Tantalum flat head screws can be made require special manufacturing. | • ASME B18.3
• ASME B18.3.6
• DIN 963 / ISO 2009
• DIN 965 / ISO 7046
• DIN 7991 / ISO 10642 |
Hex Head Cap Screws | Tantalum hex head cap screws offer the added washer face to the bolt head which is lacking on a hex bolt and tighter dimensional tolerances. Ideal for a high clamping force applications with ease of access. Generally availabe in #2 - 1/2" sizes and metric sizes. | • ASME B18.6.3
• DIN 931 / ISO 4014
• DIN 933 / ISO 4017
• DIN 961 / ISO 8676 |
Pan Head Screws | Tantalum pan head screws offer a rounded top are best used for small diameter faster needs. Offered in slotted and they are ideal for low torque applications. | • ASME B18.6.3
• DIN 7985
• DIN 921
• DIN 85 / ISO 1580
• DIN 84 / ISO 1207
(cheese head)
• DIN 966 / ISO 7047
(raised counter sunk) |
Security Screws | Unique driver designs offer these Tantalum screws resistance to unwanted tampering or removal due to the fact that they cannot be removed using an ordinary driver. Tantalum security screws are available in several different drive styles, as well as custom per print. |
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Set Screws | Tantalum set screws are available in cup, cone, flat, dog and half-dog points. Set screws have no head and are equiped with a socket or slotted driver at one end. | • ASME B18.3
• DIN 913 / ISO 4026
• DIN 914 / ISO 4027
• DIN 915 / ISO 4028
• DIN 916 / ISO 4029 |
Socket Head Cap Screws | Tantalum socket head cap screws are ideal for limited access situations where there is little clearance around the screws. They offer a safe, reliable and economic solution. | • ASMET B18.3
• DIN 912 / ISO 4762
• DIN 7984 |
Vented Screws | Tantalum vented screws are best for vacuum environments because the hole drilled through its axis (from head through threads) allow gases and other contaminents to vent. Tantalum vented screws are available in any style. |
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Tantalum Bolts
Hex Head Bolts | Tantalum hex bolts are similar to hex head cap screws but without the added washer face. They are ideal for high clamping force applications with ease access. | • ASME B18.2.1
• DIN 931 / ISO 4014
• DIN 933 / ISO 4017 |
Shoulder Bolts | Tantalum shoulder bolts are made up of a head, shoulder and threaded segment. The smooth shoulder section allows for rotating parts. Typically available with socket drivers. | • ASME
• DIN 7379 / ISO 7379
• ISO 7370 |
Wedge Anchor Bolts | Tantalum wedge anchor bolts offer a safe secure fastening solution for attaching equipment and other materials to concrete in corrosive environments. |
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Tantalum Nuts
Hex Nuts | Tantalum hex nuts are available in a variety of styles including finished hex nuts, jam nuts and heavy hex nuts. | • ASME B18.16.3
• ASME B18.2.2
• DIN 439 / ISO 4035
• DIN 934 / ISO 4032
• DIN 986 |
Lock Nuts | Tantalum lock nuts are available in all metal and polymer insert styles. All-metal lock provide even load distribution and can be used at high temperatures. Polymer insert styles are more economical and are best for temperatures under than 350°F. | • ASME B18.16.3M
• DIN 980 / ISO 7042 /
ISO 19513
• DIN 6923 / ISO 4161
• DIN 985 / ISO 10511 /
ISO 7040 |
Tantalum Studs & Threaded Rods
Studs | Tantalum studs are fully threaded or partially threaded and made to custom lengths. | • ASME B18.31.2
• DIN 976 |
Threaded Rod | Tantalum threaded rod or all thread are available in lengths greater than 1 foot. Minimum order quantity is a total of 6 feet of length. | • ASME B1.1
• DIN 975 |
Weld Studs | Tantalum weld studs are available in both arc or capacitor discharge (CD) styles. Weld studs provide an extremely secure fastening solution when one side of the stud needs to be permanently fix to a part and the other side with the threads accessible. |
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Tantalum Washers
Flat Washers | Tantalum washers are most commonly offered in SAE sizes, but also availabe in USS, oversized and custom sizes upon request. | • ASME 18.21.1
• SAE / USS
• DIN 125 / ISO 7089 /
ISO 7090
• DIN 126 / ISO 7091 |
Lock Washers | Tantalum lock washers are offered as split lock washers. Belleville spring lock washers can also be made upon request. | • ASME B18.21.1
• DIN 127 / ISO 7090
• DIN 6796 / ISO 10690
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Tantalum Grades, Chemistry & Specifications
Tantalum (Commercially Pure)
Commercially pure tantalum metal 99.95% pure tantalum as a minimum and has the best corrosion resistant properties of any metal
When it come to most acids. While its corrosion resistance is exceptional, it is relatively soft and mechanically similar in strength to copper.
Specifications: UNS R05200
| Tantalum (CP) | Ta | Nb | W | Mo | O | Ti | Ni | Fe | N | C | Si | H |
| Max% | >99.95 | 0.100 | 0.050 | 0.020 | 0.015 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 |
Tantalum 2.5% Tungsten (Ta-2.5W)
This grade of tantalum alloyed with 2.5% tungsten provided better overall strength while maintaining its exception corrosion resistant properties. For tantalum fastener applications this is usually preferred.
Specifications: UNS R05252
| Tantalum 2.5%W | Ta | W | Nb | Mo | O | Ti | Ni | Fe | N | C | Si | H |
| Typical% | Bal | 2.5 | 0.50 | 0.020 | 0.015 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | 0.005 | 0.002
|
Physical Properties
Density 16.6 g/cc
Melting Point 3290 K, 2996°C, 5462°F
Boiling Point 5731 K, 6100°C, 9856°F
Coefficient of Thermal Expansion (20°C) 6.5 x 10(-6) / °C
Electrical Resistivity (20°C) 13.5 microhms-cm
Electrical Conductivity 13% IACS
Specific Heat .036 cal/g/°C
Thermal Conductivity .13 cal/cm(2)/cm°C/sec
Tantalum Tensile Data
TANTALUM - Tensile Data
| Temperature(°F) | Ultimate Tensile (ksi) | Yield Strength at0.2% Offset (ksi) | Elongation % |
| Room Temp. | 40.0 | 25.0 | 50.0 |
| 200 | 29.0 | 22.0 |
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| 400 | 28.0 | 12.0 |
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| 600 | 28.0 | 8.0 |
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| 800 | 27.0 | 2.5 |
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TANTALUM 2.5% W - Tensile Data
| Temperature(°F) | Ultimate Tensile (ksi) | Yield Strength at0.2% Offset (ksi) | Elongation % |
| Room Temp. | 50.0 | 35.0 | 25.0 |
| 200 | 48.0 | 30.0 | 15.0 |
| 400 | 42.0 | 27.4 | 10.0 |
| 485 | 40.0 | 25.5 | 10.0 |
Tantalum Iso-Corrosion Curves
Tantalum Corrosion Resistance Table
TANTALUM SHOWS A NIL CORROSION RATE TO THE FOLLOWING MEDIA
For all temperatures up to at least 302°F (150°C) unless otherwise indicated |
| Acetic acid | Chlorine, dry, <250°C (480°F) | Maleic acid | Potassium sulfate |
| Acetic anhydride | Chlorine, wet, <350°C (662°F) | Manganous chloride | Potassium thiosulfate |
| Acetone | Chlorine oxides | Methyl alcohol | Propionic acid |
| Air,<300°C (570°F) | Chloroacetic acid | Methylsulfuric acid | Refrigerants |
| Alcohols | Chromic acid | Milk | Sea water |
| Aldehydes | Chrome plating solutions | Mineral oils | Silver nitrate |
| Aluminum chloride | Citric acid | Mixed acids (sulfuric-nitric) | Sodium acetate |
| Aluminum nitrate | Cleaning solutions | Motor fuels | Sodium aluminate |
| Aluminum sulfate | Copper salts | Nickel salts | Sodium bisulfate, solution |
| Amines | Dichloroacetic acid | Nitric acid | Sodium bromide |
| Ammonium bicarbonate | Dimethylformaldehyde | Nitric acid, fuming | Sodium chlorate |
| Ammonium carbonate | Ethylene dibromideEthyl sulfate | Nitric oxides | Sodium chloride |
| Ammonium chloride | Fatty acids | Nitrogen, <300°C (570°F) | Sodium citrate |
| Ammonium nitrate | Ferric chloride | Nitrous acid | Sodium cyanide |
| Ammonium acid phosphate | Ferric sulfate | Nitrosyl chloride | Sodium dichromate |
| Ammonium phosphate | Ferrous sulfate | Organic chlorides | Sodium hypochlorite |
| Ammonium sulfate | Food stuffs | Organic acids | Sodium nitrate |
| Amyl acetate or chloride | Formaldehyde | Organic esters | Sodium nitrite |
| Aniline hydrochloride | Formic acid | Organic salts | Sodium phosphate |
| Aqua regia | Fruits | Oxalic acid | Sodium silicate |
| Barium carbonate | Glycerine | Oxygen, <300°C (570°F) | Sodium sulfate |
| Barium chloride | Graphite, <1000°C | Pechloric acid | Sodium sulfide |
| Barium hydroxide | Hydroiodic acid | Petroleum products | Sodium sulfite |
| Barium nitrate | Hydrobromic acid | Phenol | Sodium thiosulfate |
| Benzoic acid | Hydrocarbons | Phosphoric acid, <4ppmF,<180°C | Stearic acid |
| Body fluids | Hydrochloric acid | Phosphorus, <700°C (1290°F) | Succinic acid |
| Boric acid | Hydrogen bromide, <400°C | Phosphorus chlorides | Sugar |
| Bromine, dry, <300°C (570°F) | Hydrogen chloride, <350°C | Phosphorus oxychloride | Sulfamic acid |
| Bromine, wet | Hydrogen iodide | Phthalic anhydride | Sulfur, <500°C (930°F) |
| Butyric acid | Hydrogen peroxide | Pickling acids, except HNO3-HF | Sulfur chlorides |
| Calcium bicarbonate | Hydrogen sulfide | Potassium bromide | Sulfur dioxide |
| Calcium bisulfates | Hydroxyacetic acid | Potassium chloride | Sulfuric acid, to 175°C (350°F) |
| Calcium bisulfites | Hypochlorus acid | Potassium dichromate | Sulfurous acid |
| Calcium carbonate | Iodine, <300°C (570°F) | Potassium ferricyanide | Sulfuryl chloride |
| Calcium chloride | Ketones | Potassium iodine-iodine | Tannic acid |
| Calcium hydroxide | Lactic acid | Potassium nitrate | Tartaric acid |
| Calcium hypochlorite | Lead salts | Potassium permanganate | Thoinyl chloride |
| Carbolic acid | Magnesium chloride |
| Tin salts |
| Carbon dioxide | Magnesium hydroxide |
| Zinc chloride |
| Chloric acid | Magnesium sulfate |
| Zinc sulphate |
| Chlorinated brine |
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| TANTALUM SHOWS LIMITED CORROSION RESISTANCE TO THE FOLLOWING MEDIA |
| Air,>300°C (570°F) | Hydrogen, >300°C (570°F)Hydrogen fluoride | Potassium hydroxide, conc. | Sodium hydroxide, conc. |
| Ammonia | Oleum (fuming sulfuric acid) | Potassium pyrosulfate, molten | Sodium pyrosulfate, molten |
| Ammonium hydroxide | Potassium carbonate | Sodium bisulfate, molten | Sulfur trioxide |
| Fluoride salt | Potassium hydroxide, dilute | Sodium carbonate | Sulfuric acid, >175°C (350°F) |
| Hydrofluoric acid |
| Sodium hydroxide, dilute |
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Tantalum Fasteners
