MONEL K500 FASTENERS | ULTIMATE GUIDE & MANUFACTURER
Ananka Fasteners is a premier manufacturer and supplier of high-quality Monel K500 Fasteners (UNS N05500 / W.Nr. 2.4375). Engineered for extreme environments, this precipitation-hardenable nickel-copper superalloy combines the legendary broad-spectrum corrosion resistance of Monel 400 with profoundly elevated mechanical strength and hardness, making it an irreplaceable fastening solution for critical marine, petrochemical, and aerospace infrastructure.
■ Complete Range of Monel K500 Fasteners
As a master manufacturer, we produce a comprehensive range of Monel K500 fasteners spanning from microscopic instrumentation screws to massive high-tension studs for nuclear pressure vessel closures.
| Bolts & Screws | Nuts & Washers | Studs & Rods |
|---|---|---|
| Hex Bolts / Heavy Hex Bolts | Standard Hex Nuts / Heavy Hex Nuts | Fully Threaded Studs (DIN 976) |
| Socket Head Cap Screws | Prevailing Torque Locknuts | Double Ended Studs |
| Flange Bolts / Shoulder Bolts | Flat Washers / Spring Washers | Threaded Rods / Tie Rods |
| U-Bolts / J-Bolts / Set Screws | Belleville Washers | Custom CNC Machined Studs |
■ Standard Product Pages
Explore our dedicated standard pages for specific fastener categories to view detailed dimensions, availability, and specific technical data:
- Monel K500 Bolts: Comprehensive range of cold-headed and hot-forged heavy hex, flange, and socket head configurations.
- Monel K500 Nuts: View our dedicated page for standard hex, heavy hex, and prevailing torque locknuts designed to prevent internal thread stripping under massive loads.
- Monel K500 Washers: Comprehensive range of flat, spring, and Belleville washers for critical load distribution and galling prevention.
- Monel K500 Stud Bolts: High-strength, precision-machined stud bolts engineered for secure, critical flanged connections in offshore pipelines and high-pressure manifolds.
- Monel K500 Threaded Rods: Versatile, fully-threaded fastening solutions providing exceptional resistance to flowing seawater and completely non-magnetic telemetry interference.
■ Monel K500 Material Specifications
| Material Equivalent Grades | UNS N05500 | W.Nr. 2.4375 | Alloy K500 | BS 3076 NA18 | AFNOR NU30AT |
|---|---|
| Standard Specifications | ASTM F468 / ASME SF468 (Nonferrous Bolts & Studs) ASTM F467 / ASME SF467 (Nonferrous Nuts) ASTM B865 / ASME SB865 (Bar, Rod & Forgings) |
| Size Range | Metric: M0.2 to M160 | Imperial: 3/16" to 4" Continuous custom-machined lengths up to 1500 mm available. |
| Thread Types | UNC, UNF, Metric Coarse, Metric Fine, BSW, BSF, 8-UN |
| Dimensional Standards | ASME B18.2.1, B18.2.2, DIN (931/933/934/976), ISO (4014/4017/4032) |
■ Chemical Composition of Monel K500
| Ni (+ Co) | Cu (Copper) | Al (Aluminum) | Ti (Titanium) | Fe (Iron) | Mn (Manganese) | Si (Silicon) | C (Carbon) | S (Sulfur) |
|---|---|---|---|---|---|---|---|---|
| 63.0 - 70.0% | 27.0 - 33.0% | 2.30 - 3.15% | 0.35 - 0.85% | 2.00% Max | 1.50% Max | 0.50% Max | 0.25% Max | 0.010% Max |
■ Mechanical & Physical Properties
| Tensile Strength (Min) | Yield Strength 0.2% Offset (Min) | Elongation (%) | Hardness | Modulus of Elasticity | Melting Range |
|---|---|---|---|---|---|
| 1,100 MPa (160 ksi) | 790 MPa (115 ksi) | 20% Min | 24 - 35 HRC | 179 GPa | 1315 - 1350°C |
■ Torque & Installation Guidelines (UNC Threads)
Due to its high strength and ductility, Monel K500 is highly susceptible to thread galling. Engineered boundary lubrication (such as Molybdenum Disulfide or PTFE) is mandatory during installation. Applying dry torque specifications to a lubricated joint will cause catastrophic bolt over-tensioning.
| Nominal Diameter | Threads Per Inch (UNC) | Target Torque - Dry (K≈0.20) (ft-lbs) | Target Torque - Lubricated (K≈0.15) (ft-lbs) |
|---|---|---|---|
| 1/2" | 13 | 90.2 | 67.6 |
| 5/8" | 11 | 179.5 | 134.6 |
| 3/4" | 10 | 319.0 | 239.0 |
| 1" | 8 | 770.0 | 578.0 |
■ Key Characteristics & Industrial Applications
Monel K500 is engineered to be entirely non-magnetic, even at sub-zero temperatures, and offers extreme resistance to high-velocity seawater and sour gas environments.
- Marine, Naval & Subsea Engineering: Securing marine propeller shafts, submarine dive planes, and high-output desalination centrifugal pumps where resistance to flowing seawater and cavitation is unmatched.
- Oil & Gas Exploration (Sour Gas): Non-magnetic drill collars, sensor housings, and blowout preventers (BOPs) requiring absolute immunity to hydrogen sulfide (H₂S) cracking per NACE MR0175 standards.
- Chemical Processing (CPI): High-pressure flanges, boiling acetic acid reactors, and pulp/paper digester equipment exposed to reactive halides and organic acids.
- Aerospace & Power Generation: Aerospace engine cowlings, cryogenic LNG containment structures, and nuclear reactor secondary cooling loops that demand extreme sub-zero impact toughness and thermal cycling stability.