Inconel Torx Screws
Inconel Torx Screws like Inconel 600, 601, 625, 686, 718, 725 & X750 fasteners- bolts, nuts, screws, washers, are a family of nickel-chromium-molybdenum alloys used for their high strength at elevated temperatures and good corrosion resistance. Because of its high thermal stability, Inconel can be used in service temperatures ranging from cryogenic to 2200°F (982°C). The high alloy content of Inconel fasteners enable it to withstand a wide variety of severe corrosive environments. In mild environments, such as the atmosphere, sea water, neutral salts, and alkaline media, there is almost no attack to Inconel Torx Screws. In more severe corrosive environments the combination of nickel and chromium provides resistance to oxidizing chemicals, whereas the high nickel and molybdenum contents supply resistance to nonoxidizing environments.
Because Inconel fasteners offer a good balance of corrosion resistance, temperature stability, toughness and strength they are often a material of choice for chemical processing, aerospace, marine, electronics and oil & gas.
A Ni-Cr alloy known for its high temperature stability & corrosion resistance
High temperature stability up to 2200°F (1204°C)
Good corrosion resistance at elevated temperatures
High strength material with excellent toughness at elevated temperatures
Inconel ASTM F2281 fasteners
Inconel grades: 600, 601, 625, 686, 718, 725, X750
In-depth insight on Alloy 625 (2.4856) and Alloy 718 (2.4668)
Inconel chart
Inconel datasheets available on 625 and 718
The most common grades of Inconel nickel alloy fasteners are Inconel 625 (2.4856) and Inconel 718 (2.4668). Gain more insight on these two grades by accessing our Inconel 625 and Inconel 718 overviews or by contacting our engineering experts.
Resources:
Inconel Torx Screws: 12 Point Screws, Button Head Cap Screws, Flat Head Screws, Hex Cap Screw, Pan Head Screws, Set Screws, Socket Head Cap Screws, Tamper Resistant Security Screws, Torx Screws, Vented 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
Inconel Fastener Styles
Inconel 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 Screws
| • 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 |
Inconel Bolts | Hex Head Bolts Shoulder Bolts Wedge Anchor Bolts
| • DIN 931 • DIN 933 • ISO 4014 • ISO 4017 • ISO 7370 |
Inconel 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 |
Inconel Studs/Rod | Studs Threaded Rod Weld Studs
| • DIN 975 • DIN 976 |
Inconel Washers | | • DIN 125 / ISO 7089 / ISO 7090 • DIN 126 / ISO 7091 • DIN 127 / ISO 7090 • DIN 9021 / ISO 7093 |
Inconel Hose Clamps | |
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Inconel Screws

12 Point Screws | Inconel 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 | Inconel 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 | Inconel 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 Inconel 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 | Inconel 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 | Inconel 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 Inconel screws resistance to unwanted tampering or removal due to the fact that they cannot be removed using an ordinary driver. Inconel security screws are available in several different drive styles, as well as custom per print. |
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Set Screws | Inconel 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 | Inconel 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 | Inconel 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. Inconel vented screws are available in any style. |
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Inconel Bolts

Hex Head Bolts | Inconel 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 | Inconel 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 | Inconel wedge anchor bolts offer a safe secure fastening solution for attaching equipment and other materials to concrete in corrosive environments. |
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Inconel Nuts

Hex Nuts | Inconel 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 | Inconel 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 |
Inconel Studs & Threaded Rod

Studs | Inconel studs are fully threaded or partially threaded and made to custom lengths. | • ASME B18.31.2 • DIN 976 |

Threaded Rod | Inconel 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 | Inconel 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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Inconel Washers

Flat Washers | Inconel 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 | Inconel 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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Common Inconel Fastener Grades
Inconel 600 (2.4816)
Alloy 600, UNS N06600, is a nickel-chromium alloy with good carburization and oxidation resistance through 2000°F. The alloy has long been used in the heat treating industry and Inconel 600 has useful resistance to dry Cl2 and HCl gases at moderately elevated temperatures.
Inconel 600 Specifications: AMS 5540, AMS 5665, ASME SB 166, ASME SB 167, ASME SB 168, ASTM B 166, ASTM B 167, ASTM B 168, EN 2.4816, UNS N06600, Werkstoff 2.4816, ASTM F2281
Inconel 600 | Ni | Cr | Fe | Mn | Cu | Si | C | S |
Min % | 72 | 14.0 | 6.0 | - | - | - | - | - |
Max % | - | 17.0 | 10.00 | 1.00 | 0.50 | 0.50 | 0.15 | 0.015 |
Inconel 601 (2.4851)
Inconel 601, UNS N06601, is highly resistant to oxidation through 2200°F even under severe thermal cycling. The alloy has good high temperature strength, and retains its ductility after long service exposure. Inconel 601 alloy has good hot corrosion resistance under oxidizing conditions.
Inconel 601 Specifications: AMS 5715, AMS 5870, ASME SB 167, ASME SB 168, ASTM B 167, ASTM B 168, EN 2.4851, UNS N06601, Werkstoff 2.4851, ASTM F2281
Inconel 601 | Ni | Cr | Fe | Al | Mn | Cu | Si | C | S |
Min % | 58 | 21.0 | - | 1.0 | - | - | - | - |
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Max % | 63 | 25.0 | Bal | 1.7 | 1.00 | 1.00 | 0.50 | 0.10 | 0.015 |
Inconel 625 (2.4856)
Inconel 625, UNS N06625, EN 2.4856 is the workhorse of the Inconel family and is one of the most common grades. It exhibits high creep-rupture strength and is oxidation resistant to 1800°F (982°C). Inconel 625 has excellent resistance to hot seawater, scrubber environments and reducing acids and this alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion.
Inconel 625 Specifications: AMS 5666, AMS 5837, ASME SB 443 Gr 1, ASME SB 446 Gr 1, ASTM B 443 Gr 1, ASTM B 446 Gr 1, EN 2.4856, ISO 15156-3, NACE MR0175-3, UNS N06625, Werkstoff 2.4856, ASTM F467 (Nuts), ASTM F468 (Bolts, Screws, Studs)
Inconel 625 | Ni | Cr | Mo | Fe | Nb+Ta | Co | Mn | Si | Al | Ti | C | P | S |
Min % | - | 20.0 | 8.0 | - | 3.15 | 8.0 | - | - | - | - | - | - | - |
Max % | Bal | 23.0 | 10.0 | 5.0 | 4.15 | 1.0 | 0.5 | 0.5 | 0.4 | 0.40 | 0.10 | 0.015 | 0.015 |
Inconel 686 (2.4606)
Alloy 686, UNS N06686, is designed for outstanding corrosion resistance in a wide range of severe environments. The alloy is used in the most severe environments encountered in chemical processing, pollution control, pulp and paper production, and treatment of industrial and municipal waste.
Inconel 686 Specifications: ASTM B 462, ASTM B 564 / ASME SB 564, ASTM B 574 / ASME B 574, DIN 17752, DIN 17753, DIN 17754
Inconel 686 | Ni | Cr | Mo | Ti | W | Mn | Si | C | P | S | Fe |
Min % | - | 19.0 | 15.00 | 0.02 | 3.0 | - | - | - | - | - | - |
Max % | Bal | 23.0 | 17.00 | 0.25 | 4.4 | 0.75 | 0.08 | 0.01 | 0.04 | 0.02 | 2.0 |
Inconel 718 (2.4668)
Inconel 718, UNS N07718, EN 2.4668, is the most common grade of the hardenable Inconels. This precipitation-hardened nickel-chromium alloy combines outstanding corrosion resistance and high strength at elevated temperatures. The alloy is a about 2x as strong as Inconel 625 having excellent creep-rupture strength at temperatures to 1300°F (700°C) and usable up to 1800°F (982°C). Inconel 718 is often used in gas turbines, rocket motors, spacecraft, nuclear reactors, pumps, and tooling.
Inconel 718 Specifications: AMS 5596, AMS 5662, AMS 5663, AMS 5832, ASME Case 2222-1, ASME SFA 5.14, ASTM B 637, ASTM B 670, EN 2.4668, GE B50TF14, GE B50TF15, UNS N07718, Werkstoff 2.4668, ASTM F2281
AMS 5662
Inconel 718 bolts per AMS 5662 are made of a solution annealed bar material. It is the rawest state of Inconel 718 and the "softest" of the AMS specifications for this material. In comparison solution annealed Inconel 718 bolts, AMS 5662 will be slightly lower than its aged harded counterpart, AMS 5663.
AMS 5663
AMS 5663 is an aged hardened specification that applies to Inconel 718 bolts. As these bolts are age hardened, they offer higher tensile strength and hardness compared to 718 bolts in the annealed condition of AMS 5662.
AMS 5962
AMS 5962 is a highly specialized version of Inconel 718 bolts which offers the high level of strength. Inconel bolts per AMS 5962 are cold worked after solution annealing. AMS 5962 bolts are typically used when high strength is critical as they offer a minimum tensile strength of 220 ksi (at room temperature). This version of Inconel 718 bolts are typically used up to 900°F.
AMS 5596
Like the specification AMS 5662, which pertains to solution annealed bar, AMS 5596 bolts are made a similar specification for solution treated condition sheet and plate. It is used when applications require strength and creep resistance to 1300°F, as well as oxidation resistance to 1800°F.
ASTM B637
ASTM B637 bolts are a raw material specification for both hot- and cold-worked precipitation-hardened nickel alloys, including Inconel 718. It is a spec that applies to high-temperature service. Inconel bolts per ASTM B637 must meet specific mechanical properties including strength, hardness, and stress-rupture requirements. ASTM B637 is the standard, most common specification for Inconel 718.
Inconel 718 | Ni+Co | Fe | Cr | Nb+Ta | Mo | Ti | Co | Al | Mn | Si | Cu | C | P | S | B |
Min % | 50 | - | 17.0 | 4.75 | 2.80 | 0.65 | - | 0.20 | - | - | - | - | - | - | - |
Max % | 55 | Bal | 21.0 | 5.50 | 3.30 | 1.15 | 1.0 | 0.80 | 0.35 | 0.35 | 0.30 | 0.08 | 0.015 | 0.015 | 0.006 |
Inconel 725
Alloy 725, UNS N07725, nickel-chromium-molybdenum-niobium age-hardenable alloy that has essentially the same corrosion resistance as Inconel 625, but with a strength of that is twice that of annealed Inconel 625. The strength of this alloy is developed by heat treatment to achieve high ductility and toughness. The alloy is resistant to hydrogen embrittlement and stress-corrosion cracking as well.
Inconel 725 | Ni+Co | Cr | Fe | Mo | Nb | Ti | Al | Mn | Si | C | P | S |
Min % | 55 | 19.0 | - | 7.00 | 2.75 | 1.00 | - | - | - | - | - | - |
Max % | 59 | 22.5 | Bal | 9.50 | 4.00 | 1.70 | 0.35 | 0.35 | 0.20 | 0.03 | 0.015 | 0.010 |
Incone X750 (EN 2.4665)
Alloy X-750, UNS N07750, EN 2.4665, is a precipitation hardened alloy known for its corrosion resistance and high temperature oxidation resistance up to temperatures of 1300°F. This alloy is similar to Alloy 600 but made precipitation hadenable with the addition of titanium and aluminium.
Inconel X750 Specifications: ASTM B 637/ASME SB 637; ISO 9723-9725; SAE AMS 5667-5671 and 5747; EN 10269
Inconel 750 | Ni | Cr | Fe | Nb+Ta | Mn | Co | Al | Si | Cu | C | S |
Min % | 70.0 | 14.0 | 5.0 | 0.70 | - | - | 0.40 | - | - | - | - |
Max % | - | 17.0 | 9.0 | 12.0 | 1.00 | 1.00 | 1.00 | 0.50 | 0.50 | 0.08 | 0.01 |
Inconel Frequently Asked Question of the Week
Inconel 600 or 601 for High Temperature Oxidation Resistance
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Q: For a high temperature oxidation-rich environment which would be better Inconel 600 or 601 bolts?A: For this situation it really depends on the temperature range you are dealing with because both an Inconel 600 bolt and an Inconel 601 bolt offer good oxidation resistance. Inconel 600 can service up to 2000F where Inconel 601 can handle up to 2200F. If you temperatures aren’t that severe, I’d suggest A286 bolts for excellent oxidation resistance. An A286 bolt is known for its high strength, creep resistance and oxidation resistance up to 1300F. |
Mechanical Data
ALLOY 600 - Tensile Data
Temperature (°F) | Ultimate Tensile (ksi) | Yield Strength at0.2% Offset (ksi) | Elongation % |
Room Temp. | 93.0 | 37. 0 | - |
1000 | 84.0 | 28.5 |
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1200 | 65.0 | 26.5 |
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1400 | 27.5 | 17.0 |
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1600 | 15.0 | 9.0 |
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1800 | 7.5 | 4.0 |
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ALLOY 601 - Tensile Data
Temperature(°F) | Ultimate Tensile (ksi) | Yield Strength at0.2% Offset (ksi) | Elongation % |
Room Temp. | 100.0 | 54.0 | 45.0 |
1000 | 90.0 | 48.0 | 44.0 |
1200 | 60.0 | 41.0 | 45.0 |
1400 | 34.0 | 26.0 | 70.0 |
1600 | 18.0 | 15.0 | 120.0 |
ALLOY 625 - Tensile Data
Temperature(°F) | Ultimate Tensile (ksi) | Yield Strength at0.2% Offset (ksi) | Elongation % |
Room Temp. | 144.0 | 84.0 | 44.0 |
400 | 134.0 | 66.0 | 45.0 |
600 | 132.0 | 63.0 | 42.5 |
800 | 132.0 | 61.0 | 45.0 |
1000 | 130.0 | 61.0 | 48.0 |
1200 | 119.0 | 60.0 | 34.0 |
1400 | 78.0 | 59.0 | 59.0 |
1600 | 40.0 | 39.0 | 117.0 |
ALLOY 718 - Tensile Data
Temperature (°F) | Ultimate Tensile (ksi) | Yield Strength at0.2% Offset (ksi) | Elongation % |
Room Temp. | 210.0 | 175.0 | 22.0 |
400 | 138.0 | 163.0 | 20.0 |
800 | 191.0 | 156.0 | 19.0 |
1000 | 185.0 | 155.0 | 18.0 |
1200 | 168.0 | 149.0 | 19.0 |
1400 | 111.0 | 110.0 | 27.0 |
Inconel 718 Grade
UltimateTensileStrength | Specification |
185ksi min | AMS 5662/5663ASTM B637 |
220ksi min | AMS 5962 |
PRESSURE - TEMPERATURE RATINGS FOR ALLOYS C276 / 625 / 825
Nominal Designation | Forgings | Castings |
| Plates |
54Ni 16Mo 15Cr | 8462 Gr N10276 |
| B575 Gr. N10276 (1),(2) |
60Ni 22Cr9Mo 3.5Cb | B564GR N 08625 |
| B443 Gr. N06625 (3), (5) |
42Ni 21.5Cr 3Mo 2.3Cu | 8564 Gr N0S825 |
| B424 Gr. N08825 (3),(7) |
Working Pressures by Classes, psig |
Temp F | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
20 to 100 | 290 | 750 | 1000 | 1500 | 2250 | 3750 | 6250 |
200 | 250 | 750 | 1000 | 1500 | 2250 | 3750 | 6250 |
300 | 230 | 730 | 370 | 1455 | 2185 | 3640 | 6070 |
400 | 200 | 700 | 930 | 1395 | 2095 | 3490 | 5820 |
500 | 170 | 565 | 885 | 1330 | 1995 | 3325 | 5540 |
600 | 140 | 605 | 805 | 1210 | 1815 | 3025 | 5040 |
650 | 125 | 530 | 785 | 1175 | 1765 | 2940 | 4905 |
700 | 110 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
750 | 95 | 530 | 710 | 1065 | 1595 | 2660 | 4430 |
800 | 80 | 510 | 675 | 1015 | 1525 | 2540 | 4230 |
850 | 65 | 485 | 650 | 975 | 1450 | 2435 | 4060 |
900 | 50 | 450 | 500 | 900 | 1350 | 2245 | 3745 |
950 | 35 | 385 | 515 | 775 | 1160 | 1930 | 3220 |
1000 | 20 | 365 | 485 | 725 | 1090 | 1820 | 3030 |
1050 |
| 360 | 480 | 720 | 1080 | 1800 | 3000 |
1100 |
| 325
| 430 | 645 | 965 | 1610 | 2685 |
1150 |
| 275 | 365 | 550 | 825 | 1370 | 2285 |
1200 |
| 205 | 275 | 410 | 615 | 1030 | 1715 |
1250 |
| 165 | 220 | 330 | 495 | 825 | 1370 |
1300 |
| 120 | 150 | 240 | 360 | 500 | 1000 |
Inconel Corrosion Data
