MP35N Nuts
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
One of the highest strength alloys available to industry
Extreme high strength properties up to 300 ksi ultimate tensile.
Good in moderately elevated temperatures of 800°F.
Moderate corrosion resistance.
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RAYCHIN LIMITED
MP35N Nuts · Hex / Lock / Jam / Flange / Coupling Nuts · Inch & Metric · AMS 5844 / 5845 / 5758MP35N Nuts: Ultra-High Strength Cobalt-Nickel Alloy Nuts for Extreme Environment Bolting
RAYCHIN LIMITED is a leading manufacturer of MP35N Nuts – precision threaded fasteners engineered from cobalt-nickel-chromium-molybdenum multiphase superalloy, delivering the ultimate combination of ultra-high strength, exceptional corrosion resistance, and reliable performance in the most demanding bolted joints. Our nut product line includes hex nuts, lock nuts, jam nuts, flange nuts, coupling nuts, slotted nuts, and heavy‑series nuts – all manufactured to the highest precision standards. Through precise cold working and age hardening, MP35N achieves ultimate tensile strength up to 300 ksi (2070 MPa) while maintaining excellent ductility and toughness. 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 ASME B18.2.2 (inch hex nuts), ISO 4032 (metric hex nuts), DIN 934, and DIN 985. Whether you require MP35N hex nuts for aerospace structural joints, MP35N lock nuts for downhole tools, or MP35N coupling nuts for medical devices, RAYCHIN delivers precision, quality, and full traceability. All mechanical properties are presented in MPa and ksi (kilopound per square inch).
MP35N Nuts – Design & Configurations
Hex Nuts & Heavy Hex Nuts
MP35N hex nuts are the most common type for general bolting. Available in finished hex (ASME B18.2.2, ISO 4032) and heavy hex series (ASME B18.2.2, DIN 934). Precision tapped with class 2B/6H threads. Ideal for aerospace, oil & gas, and power generation.
Lock Nuts (Nylon Insert / All-Metal)
MP35N lock nuts provide prevailing torque to prevent loosening under vibration. Available with nylon insert (DIN 985) or all-metal deformed thread (DIN 980). Manufactured to ASME B18.16.6 and IFI standards. Non-magnetic and corrosion resistant.
Jam Nuts & Flange Nuts
MP35N jam nuts (thin height) are used for locking adjustments. MP35N flange nuts feature an integrated flange that distributes load and eliminates washers. Manufactured to ASME B18.2.2 (jam) and ASME B18.16.6 (flange).
Coupling Nuts & Extended Height Nuts
MP35N coupling nuts (long nuts) are used to connect two threaded rods or for tensioning applications. Available in various lengths and diameters. Custom lengths and special end configurations available.
Aerospace & Military Standards
Our MP35N nuts meet applicable sections of NAS1802 (hex nuts), NASM 21042 (lock nuts), MS21042, MS21044, MS21045, MS35649, MS35650, and AN315/AN316. Full compliance with AMS 5844, AMS 5845, and AMS 5758 for material and heat treatment. Silver plating per AMS 2410 available for anti-galling.
Custom & Non-Standard Nuts
Need a special thread size, non-standard height, proprietary locking feature, or unique drive configuration? RAYCHIN engineers design and produce custom MP35N nuts to your exact specifications – any condition (annealed, cold worked, aged), with full material traceability. Prototype to production volumes supported.
Critical Applications of MP35N Nuts
Aerospace & Defense
MP35N nuts used in aircraft structural joints, engine mounts, landing gear assemblies, avionics enclosures, and missile systems. Withstand extreme vibration, thermal cycling from -300°F to 800°F, and high static loads. Non-magnetic properties essential for sensitive instrumentation.
Oil & Gas / Downhole Tools
MP35N nuts qualified per NACE MR0175 for downhole drilling tools, MWD/LWD equipment, wellhead connectors, BOP stacks, and subsea trees. Resist sulfide stress cracking (SSC) and pitting in H₂S/CO₂ environments. Lock nuts prevent loosening under extreme vibration.
Medical & Surgical Implants
MP35N nuts used in surgical instruments, orthopedic external fixators, dental implants, and prosthetic devices. Full biocompatibility per ASTM F562 and ISO 5832-6, excellent fatigue resistance, and non-magnetic for MRI compatibility.
Marine & Subsea
MP35N nuts in seawater pump flanges, subsea connector assemblies, ROV systems, and offshore platform components resist pitting and crevice corrosion in saltwater. Provide reliable fastening in splash-zone and deepwater environments. Virtually immune to crevice corrosion and pitting.
Power Generation
MP35N nuts in gas turbines, steam turbines, and nuclear reactor internals provide reliable fastening of casing bolts and sensor mounts. Maintain clamping force after thousands of thermal cycles from cryogenic to 800°F without relaxation.
Chemical Processing
MP35N nuts in high-pressure reactor flanges, pump casings, and valve bonnets resist most mineral acids, hydrogen sulfide, and chloride solutions. Provide consistent clamp load in aggressive chemical environments.
International Standards & Global Designations – MP35N Nuts
RAYCHIN LIMITED manufactures MP35N nuts from vacuum induction melted (VIM) and vacuum arc remelted (VAR) material conforming to the most widely used national and international specifications. All material is traceable to the mill.
Chemical Composition (Weight %) – MP35N Alloy for Nuts
Our MP35N nuts are produced from vacuum induction melted (VIM) and vacuum arc remelted (VAR) material conforming to the following limits per AMS, ASTM, and industry standards.
Metallurgical note: MP35N is a multiphase cobalt-nickel-chromium-molybdenum alloy strengthened through a unique combination of solid solution strengthening, cold work hardening (typically 40-60% reduction), and age hardening via precipitation of Co₃Mo phase. The alloy maintains excellent ductility even at high cold reduction levels, enabling production of high-strength nuts with precision-tapped threads. It remains essentially non-magnetic (permeability <1.005 μ) even after extensive cold working, critical for medical and directional drilling applications. High-temperature (1350-1500°F) heat treatments improve hydrogen embrittlement resistance while maintaining high strength.
Complete Mechanical & Physical Properties – MP35N Nuts (MPa / ksi)
MP35N nuts are supplied in various conditions per AMS and ASTM specifications. Data represent typical values based on AMS, ASTM, and industry standards. ksi values (kilopound per square inch) are provided alongside MPa.
Mechanical Properties by Condition – MP35N Nuts
Physical Properties – MP35N Alloy
High‑Temperature Performance of MP35N Nuts
MP35N alloy retains useful mechanical properties at elevated temperatures up to 800°F (427°C) and can operate in moderately elevated temperatures. The alloy can operate at cryogenic temperatures without embrittlement.
Elevated Temperature Capabilities
High-Temperature Comparison
Note: For applications above 800°F (427°C), consider nickel-based superalloys like Inconel 718. MP35N excels in applications requiring maximum strength at moderate temperatures with exceptional corrosion resistance.
Exceptional Corrosion Resistance of MP35N Nuts
MP35N alloy offers outstanding corrosion resistance across a wide range of aggressive environments, making it suitable for the most demanding applications including medical implants, downhole tools, marine equipment, and chemical processing.
- General Corrosion Resistance: Excellent resistance to most mineral acids (nitric, hydrochloric, sulfuric), hydrogen sulfide, seawater and salt spray environments.
- Stress Corrosion Cracking (SCC): Exceptional resistance to chloride and sour (H₂S) environments. Qualified per NACE MR0175 for oil & gas applications with hardness up to 51 HRC.
- Pitting and Crevice Corrosion: Superior resistance to localized corrosion in seawater and brine solutions. Virtually immune to crevice corrosion and pitting even at the highest strength levels.
- Hydrogen Embrittlement: Excellent resistance to hydrogen embrittlement when properly heat treated.
- Sulfidation & High-Temperature Oxidation: Exceptional resistance to sulfidation and high-temperature oxidation environments.
- Seawater Performance: In seawater, MP35N is virtually immune to crevice corrosion, stress corrosion cracking, and pitting.
- Biocompatibility: Fully biocompatible per ASTM F562 and ISO 5832-6 for medical implant applications.
- Bimetallic Corrosion: Can be safely connected to 400 series stainless steel, 300 series stainless steel, titanium and titanium alloys, and copper alloys with appropriate precautions.
Manufacturing Standards – MP35N Nuts
All MP35N nuts are manufactured and tested to meet the following standards:
We offer surface finishes: passivation (ASTM A967), silver plating (AMS 2410 for anti‑seize), PTFE coating, electropolish. Full traceability and destructive/non‑destructive testing available (UT, MPI, PMI). ISO 13485 certified for medical applications with cleanroom packaging available.
Why RAYCHIN LIMITED – The MP35N Nut Authority
Contact the MP35N nut experts
Request a quotation for MP35N hex nuts, lock nuts, jam nuts, flange nuts, coupling nuts – any standard (ASME, ISO, DIN, NAS) – any condition (AMS 5758, 5844, 5845), any quantity. Global delivery. Mechanical data in MPa/ksi available for all products.
sales@ray-chin.com | +86 534 2166 566Our team provides technical support in English, German, Mandarin, Japanese.
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