Welcome to RAYCHIN LIMITED

+86-531-59532816



Inconel Fasteners



Location： HOME - Special Fasteners - Inconel Fasteners - Inconel 12 Point Screws

Inconel 12 Point Screws

Inconel 12 Point 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 Nutsenable 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 12 Point 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.

RAYCHIN SPECIALTY METALS FASTENERS: BOLTS, NUTS, SCREWS, WASHERS, STUDS, THREADED RODS, U-BOLT, J-BOLTS

STANDARD AND CUSTOMIZED, SMALL BATCH AND LARGE BATCH, IMPERIAL AND METRIC

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 grades: 600, 601, 625, 686, 718, 725, X750

Request a Quote from RAYCHIN

We're here to help!

Request a Quote

RAYCHIN LIMITED

Name: Inconel 12 Point Screws
SKU: 0

Inconel 12 Point Screws · Double Hex Bolts · IFI115

Inconel 12 Point Screws: Nickel-Chromium Superalloy Double Hex Fasteners for Extreme Environments

Inconel 718 (UNS N07718 / 2.4668) | 625 (UNS N06625 / 2.4856) | 600 (UNS N06600 / 2.4816) | X-750 (UNS N07750) | 601 (UNS N06601 / 2.4851)

RAYCHIN LIMITED is a leading manufacturer of Inconel 12 Point Screws – precision fasteners featuring a double hexagon (12-point) head design that provides superior torque transmission and reduced risk of stripping compared to standard hex bolts. These Inconel 12 point bolts are engineered for critical applications where high strength, reliability, and access constraints are paramount. The 12-point configuration allows for a smaller head diameter while maintaining wrenching area, ideal for confined spaces in aerospace and industrial assemblies. Manufactured from premium nickel‑chromium superalloys, they deliver exceptional high‑temperature strength up to 700°C continuous service (with Inconel 718 maintaining 1275 MPa at ambient and 650°C), outstanding oxidation resistance, and immunity to chloride‑ion stress corrosion cracking. Our portfolio includes all standard and custom configurations manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN and KS standards, including IFI115 for 12-point flange screws. Whether you require Inconel 718 12 point screws for aerospace turbine assemblies, Inconel 625 12 point bolts for offshore platforms, or Inconel 600 12 point fasteners for nuclear applications, RAYCHIN delivers precision, quality, and full traceability. All mechanical properties are presented in MPa and ksi (kilopound per square inch).

Inconel 12 point screwsInconel 12 point boltsInconel double hex screwsInconel 718 12 point screwsInconel 625 12 point boltsInconel 600 12 point fastenersInconel X-750 12 point screwsUNS N07718 12 point boltsUNS N06625 12 point screwsUNS N06600 12 point bolts2.4668 12 point screws2.4856 12 point bolts2.4816 12 point screwsASTM B637 12 point boltsASTM B446 12 point screwsASTM B166 12 point boltsIFI115 12 point screwsNAS 12 point boltsMS 12 point screwsNACE MR0175 12 point boltshigh temperature 12 point screwsaerospace 12 point fasteners

Inconel 12 Point Screws – Design & Configurations

12 Point Head Design (Double Hex)

Inconel 12 point screws feature a double hexagon head configuration with 12 lobes, allowing for 50% more engagement points than standard 6-point hex bolts. This design enables higher torque application with reduced risk of rounding or stripping, particularly critical in confined spaces where socket access is limited. Available with relieved shank, short-thread, and full-thread variants. Head dimensions conform to IFI115, NAS, and MS standards.

Flange Head & Standard Head

Available in both 12 point flange head (integral washer face for load distribution) and 12 point standard head configurations. Flange head styles eliminate the need for separate washers and provide superior bearing surface. Standard head styles suitable for counterbored holes. Custom head dimensions available per drawing.

Thread Specifications

Inconel 12 point bolts available with Unified Coarse (UNC), Unified Fine (UNF), UNJF-3A (aerospace), and metric coarse/fine threads. Thread classes 2A, 3A, 6g. Sizes from #8 to 1-1/2" (M4 to M36). Precision rolled threads for superior fatigue life. Relieved shank options available for weight reduction in aerospace applications.

Aerospace & Military Standards

Our Inconel 12 point screws meet IFI115 (12-point flange head), NAS1802, NAS1351/1352 (applicable head dimensions), and MS standards including MS16995, MS20073-20083. Full compliance with AMS 5662 (718), AMS 5666 (625), AMS 5665 (600), and AMS 5667 (X-750) for material and heat treatment. Silver plating per AMS 2410 available for anti-galling and high-temperature anti-seize.

Industrial & Petrochemical Grades

Inconel 12 point fasteners for oil & gas, chemical processing, and power generation manufactured to ASTM B166 (600/601), ASTM B446 (625), ASTM B637 (718/X-750), API 20F, and NACE MR0175/ISO 15156. Supplied with EN 10204 3.1/3.2 certifications and full NDT (PMI, UT, MPI) upon request.

Custom & Non-Standard 12 Point Screws

Need a special head height, extra-long length, proprietary drive, or custom coatings? RAYCHIN engineers design and produce custom Inconel 12 point screws to your exact specifications – any Inconel grade, any heat treat condition (annealed, aged), with full material traceability. Prototype to production volumes supported.

Critical Applications of Inconel 12 Point Screws

Aerospace & Defense

Inconel 718 12 point screws used in jet engine components (turbine blades, combustion chambers, compressor casings), airframe structures, landing gear assemblies, and rocket motor casings. Withstand 650°C operating temperatures and extreme vibration. Tensile strength up to 1455 MPa ensures structural integrity under high-G maneuvers. The 12-point head allows installation in confined engine compartments where standard sockets cannot access.

Oil & Gas / Sour Service

Inconel 625 12 point bolts and Inconel 718 12 point screws qualified per NACE MR0175 for wellhead equipment, valve bonnets, subsea actuators, and BOP assemblies. Resist sulfide stress cracking (SSC) and pitting in H₂S/CO₂ environments at elevated pressures and temperatures. 12-point design enables higher preload in restricted spaces.

Power Generation

Inconel 12 point fasteners in gas turbines, steam turbines, and nuclear reactors provide reliable joining of casings, flanges, and support structures. Maintain clamping force after thousands of thermal cycles from -200°C to 700°C without relaxation. Inconel 600 offers excellent performance in nuclear service with resistance to high-purity water corrosion.

Chemical Processing

Inconel 625 12 point screws resist boiling sulfuric acid, hydrochloric acid, and chlorinated solvents in reactor agitators, pump shafts, and valve assemblies. Immunity to chloride stress corrosion cracking ensures long-term reliability in aggressive media. 12-point flange head eliminates need for separate washers in sanitary applications.

Marine & Offshore

Inconel 12 point bolts in seawater pump couplings, propeller shaft locking devices, and subsea control modules resist pitting and crevice corrosion in saltwater. Zero fastener failures reported after 3+ years continuous offshore operation. Silver-plated variants prevent galling in marine environments.

High-Temperature Vacuum Systems

Inconel 718 12 point screws used in space simulation chambers, vacuum furnaces, and semiconductor equipment. Low volatility and anti-galling properties ensure reliable performance in ultra-high vacuum environments. Maintain integrity at bake-out temperatures up to 400°C.

International Standards & Global Designations – Inconel 12 Point Screws

RAYCHIN LIMITED manufactures Inconel 12 point screws from material conforming to the most widely used national and international specifications. All material is traceable to the mill.

Inconel Grade	UNS	DIN / W. Nr.	EN	BS	Applicable Specifications (12 Point Screws)
Inconel 718	N07718	2.4668	NiCr19Fe19Nb5Mo3	—	ASTM B637; AMS 5662 / 5663; API 6A718; NACE MR0175 / ISO 15156-3; IFI115; NAS1802
Inconel 625	N06625	2.4856	NiCr22Mo9Nb	NA21	ASTM B446 / ASME SB446; AMS 5666; API 6A; NACE MR0175; IFI115; suitable for 12 point bolts
Inconel 600	N06600	2.4816	NiCr15Fe	NA14	ASTM B166 / ASME SB166; AMS 5665; NACE MR0175; applicable for 12 point fasteners
Inconel X-750	N07750	2.4669	NiCr15Fe7TiAl	—	ASTM B637; AMS 5667 / 5668; NACE MR0175; high-temperature spring applications
Inconel 601	N06601	2.4851	NiCr23Fe	—	ASTM B166 / ASME SB166; AMS 5870; superior oxidation resistance up to 1150°C

UNS N07718 2.4668 UNS N06625 2.4856 UNS N06600 2.4816 NACE MR0175 API 20F IFI115

Chemical Composition (Weight %) – Inconel Alloys for 12 Point Screws

Our Inconel 12 point screws are produced from melts conforming to the following limits per ASTM/ASME/AMS.

Inconel 718 (UNS N07718 / 2.4668)

Element	Min %	Max %
Ni	50.0	55.0
Cr	17.0	21.0
Nb (+Ta)	4.75	5.50
Mo	2.80	3.30
Ti	0.65	1.15
Al	0.20	0.80
Fe	balance
Mn	—	0.35
Si	—	0.35
C	—	0.08
S	—	0.015
P	—	0.015
B	—	0.006
Cu	—	0.30

Inconel 625 (UNS N06625 / 2.4856)

Element	Min %	Max %	Typical
Ni (+Co)	58.0	—	61.0
Cr	20.0	23.0	21.5
Mo	8.0	10.0	9.0
Nb (+Ta)	3.15	4.15	3.6
Fe	—	5.0	2.5
C	—	0.10	0.03
Mn	—	0.50	0.2
Si	—	0.50	0.2
Al	—	0.40	0.2
Ti	—	0.40	0.2

Inconel 600 (UNS N06600 / 2.4816)

Element	Min %	Max %	Typical
Ni (+Co)	72.0	—	76.0
Cr	14.0	17.0	15.5
Fe	6.0	10.0	8.0
C	—	0.15	0.08
Mn	—	1.0	0.5
Si	—	0.5	0.2
S	—	0.015	0.008
Cu	—	0.5	0.2

Metallurgical note: High nickel content (≥50%) provides exceptional resistance to chloride stress corrosion cracking. Chromium (14–23%) ensures oxidation resistance up to 1150°C. Molybdenum (in 625) and Nb+Ti (in 718/X-750) contribute to solid‑solution strengthening and precipitation hardening. Inconel 718's precipitation-hardened condition provides yield strengths exceeding 1035 MPa (150 ksi) and maintains 1275 MPa classification at ambient temperature and 650°C, ideal for high-stress 12 point screw applications.

Complete Mechanical & Physical Properties – Inconel 12 Point Screws (MPa / ksi)

Inconel 12 point screws are supplied in solution annealed (600, 625, 601) or age‑hardened (718, X‑750) condition per specification. Data represent typical values based on ASTM, AMS, and industry standards. ksi values (kilopound per square inch) are provided alongside MPa.

Mechanical Properties – Typical Values (room temperature) for 12 Point Screws

Grade / Condition	Tensile Strength (MPa)	Tensile Strength (ksi)	Yield Strength 0.2% (MPa)	Yield Strength 0.2% (ksi)	Elongation (%)	Hardness
Inconel 718 (age hardened, AMS 5662)	1240-1455	180-211	1035-1180	150-171	12-21	36-44 HRC
Inconel 625 (annealed)	827-930	120-135	414-517	60-75	30-42	≤95 HRB
Inconel 600 (annealed)	550-760	80-110	205-350	30-51	35-55	65-85 HRB
Inconel X-750 (aged)	1170-1240	170-180	760-850	110-123	10-15	30-38 HRC
Inconel 601 (annealed)	550-650	80-94	240-300	35-43	30-35	≤88 HRB

Physical Properties (typical) – Inconel 12 Point Screws

Property	Inconel 718	Inconel 625	Inconel 600	Inconel 601
Density (g/cm³)	8.19-8.22	8.44	8.47	8.11
Melting Range (°C)	1210-1344	1290-1350	1355-1413	1320-1370
Thermal Conductivity (W/m·K) at 20°C	11.4	9.8	14.9	11.2
Modulus of Elasticity (GPa)	200-205	205	214	207
Thermal Expansion (10⁻⁶/°C 20-100°C)	16.2	16.6	15.7	15.8

High‑Temperature Performance of Inconel 12 Point Screws

Inconel superalloys retain significant strength at elevated temperatures, making Inconel 12 point screws ideal for gas turbines, furnace assemblies, and exhaust systems. Data below demonstrate the superiority of Inconel 718, 625, and 601 for high‑T applications.

Elevated Temperature Strength – Comparison by Grade

Grade	Maximum Service Temperature (continuous)	Tensile Strength at 650°C (MPa)	Tensile Strength at 650°C (ksi)	Characteristics
Inconel 718	700°C (1300°F)	1160	168	Highest strength up to 700°C; retains 80% of RT strength at 650°C; 1275 MPa classification at 650°C
Inconel 625	982°C (1800°F)	~415	~60	Excellent strength up to 980°C; resists creep
Inconel 600	1100°C (2012°F)	~250	~36	Good oxidation resistance; retains ~45% of RT strength at 650°C
Inconel 601	1150°C (2100°F)	~210	~30	Superior cyclic oxidation resistance due to aluminum addition

At 650°C, Inconel 718 retains about 80% of its room‑temperature tensile strength and maintains a classification of 1275 MPa, outperforming many other alloys. Inconel 625 and 601 provide outstanding resistance to oxidation and carburization at even higher temperatures, making them excellent choices for high‑temperature 12 point screw applications.

High‑Temperature Limits & Oxidation Resistance

Grade	Maximum Service Temperature (oxidizing)	Characteristics
Inconel 718	700°C (1300°F)	High tensile and fatigue strength at 700°C; high oxidation resistance at 1000°C
Inconel 625	982°C (1800°F)	Good tensile and fatigue properties below 980°C; resists creep and carburization
Inconel 600	1100°C (2012°F)	High strength at 650°C; highest operating temperature in air is 1175°C
Inconel 601	1150°C (2100°F)	Superior cyclic oxidation resistance due to aluminum addition; ideal for furnace fixtures

Exceptional Corrosion Resistance of Inconel 12 Point Screws

The high nickel and chromium content imparts resistance to a wide range of corrosive media: chlorides, acids, and alkalis. Inconel 625 and Inconel 718 12 point screws are particularly resistant to pitting and crevice corrosion in seawater and sour environments.

Chloride stress corrosion cracking (SCC): All Inconel grades exhibit high resistance due to Ni >40%; immune to chloride-ion SCC.
Sulfuric & Hydrochloric acids: Inconel 625 shows exceptional performance in reducing acids (Mo addition).
Sour service (H₂S): Inconel 625 & 718 qualified per NACE MR0175/ISO 15156 for oil & gas.
Oxidation & carburization: Inconel 601 outperforms due to aluminum addition.
Seawater: Inconel 625 resists pitting and crevice corrosion, used extensively in marine fasteners.
High-purity water & alkalis: Inconel 600 offers excellent corrosion resistance in nuclear applications.
High-temperature oxidation: Inconel 718 forms a protective oxide layer maintaining integrity to 1000°C.

Manufacturing Standards – Inconel 12 Point Screws

All Inconel 12 point screws are manufactured and tested to meet:

IFI115 (12-point flange head)NAS (NAS1802, NAS1351, NAS1352)MS (MS16995, MS20073-20083)AN (AN3-AN20 applicable head styles)ANSI B18.2.1, B18.3ASTM B166, B446, B637ASME SB166, SB446SAE (AMS 5662, 5663, 5666, 5665, 5667)API 6A, 20FNACE MR0175 / ISO 15156ISO 4014, 4017, 4762DIN 931, 933, 912KS B1002, B1003EN 2927, EN 3388, BS EN 4635 (aerospace)

We offer surface finishes: passivation (ASTM A967), silver plating (AMS 2410 for anti‑seize), PTFE coating, electropolish, and zinc‑nickel plating. Full traceability and destructive/non‑destructive testing available (UT, MPI, PMI).

Why RAYCHIN LIMITED – The Inconel 12 Point Screw Authority

Metallurgical expertise: Decades of experience with nickel superalloys. We ensure correct heat treatment: solution anneal for 600/625/601, age hardening for 718/X‑750 per AMS/ASTM schedules. In‑house PMI verifies chemistry of every heat. Our Inconel 718 12 point screws maintain 1275 MPa classification at 650°C.

Global certifications: ISO 9001, AS9100D, PED, API Q1. All 12 point screws supplied with EN 10204 3.1/3.2 certifications, NACE compliance when required.

Precision forming & threading: CNC cold heading and thread rolling ensure consistent 12-point head geometry, accurate dimensions, and Class 2A/3A thread fit. 100% inspection available. Relieved shank and short-thread variants available for weight-critical aerospace applications.

Custom solutions: Special head dimensions, proprietary coatings (silver plate, PTFE), non‑standard lengths, and tailored packaging. We support urgent delivery and JIT programs.

Contact the Inconel 12 point screw experts

Request a quotation for Inconel 12 point screws, double hex bolts, 12 point flange head screws – any standard (IFI115, NAS, MS, AN, ANSI, ASTM, ASME, API, NACE, ISO, DIN, KS) – any Inconel grade, any quantity. Global delivery. Mechanical data in MPa/ksi available for all products.

sales@ray-chin.com | +86 534 2166 566

Our team provides technical support in English, German, Mandarin, Japanese.

Request A Quote! We'll respond as soon as possible(within 12 hours)