
Monel K-500 Custom fasteners
ASTM B865
Monel K-500 custom fasteners use age-hardened strength in the nickel–copper alloy family at drawing-defined bearing, locating or threaded interfaces. The manufacturing route starts with the functional datums and required final condition.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Annealed / age hardened
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Threads · Metric
Threads · Inch
Heat Treatment
Annealed or age hardenedAnnealing provides a workable starting condition, while controlled aging develops the higher strength specified for age-hardened K-500.
What we can make in Monel K-500
Head & drive
Choose the drive around the installed tool path: external flats need space around the head, while a socket recess needs axial access. Flange diameter determines the bearing footprint on the equipment face.
Shank & interfaces
Use shoulders and steps to locate tooling, pivots or covers rather than relying on thread clearance for positioning. Diameter tolerances and transition radii must match the mating bore and seat.
Thread & end form
Use unequal ends for housings and nuts with different engagement depths. Cross-holes, special tips and thread reliefs can provide pin retention, adjustment or clearance at a specific interface.
- Geometry
- Stepped shanks · Special heads · Ends
- Thread systems
- Metric · UNC · UNF · 8UN · UNJ
- Inputs
- Drawing · CAD · Parts list
- Final condition
- Annealed · age hardened
- Inspection
- Drawing dimensions · Critical fits · Thread gauging
Manufacturing route
CNC machining suits samples and small batches. Volume heads are formed in a workable condition with the final aging route included in process planning.
Heat treatment & final condition
Solution treatment and the specified aging condition are recorded against the production lot; final dimensions are checked after thermal processing.
Finished geometry
Head geometry, bearing face, shank and thread fit are checked after the final machining and thermal operations.
Where K-500 fits — and what matters

Offshore & Marine
Deck-equipment brackets and marine pump skidsMonel K-500 drawing-based special alloy fasteners provide drawing-defined pins, stepped retainers or shoulder connections for deck-equipment brackets and marine pump skids. The loaded shoulder, locating fit and service-removal features establish the manufactured geometry. The assembled contact is exposed to saltwater, deposits and neighbouring metals.

Water Treatment & Desalination
Membrane-skid and pump supportsMonel K-500 drawing-based special alloy fasteners provide drawing-defined pins, stepped retainers or shoulder connections for membrane-skid and pump supports. The loaded shoulder, locating fit and service-removal features establish the manufactured geometry. The water stream, cleaning cycle and retained liquid define exposure at the installed part.

Oil & Gas
Utility skids and instrument supportsMonel K-500 drawing-based special alloy fasteners provide drawing-defined pins, stepped retainers or shoulder connections for utility skids and instrument supports. The loaded shoulder, locating fit and service-removal features establish the manufactured geometry. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same custom fastener. Different material priorities.
Monel K-500 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- The load path through shoulders, steps and threaded features
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the drawing’s sealing, locating and bearing interfaces in the exposure description.
Super Duplex 2507
Super-duplex strength and resistance to chloride pitting.
- Connection priority
- The load path through shoulders, steps and threaded features
- Final duplex structure
- S32750 chemistry and final solution treatment belong together. Forming, section size and cooling affect the structure represented by the mechanical and corrosion records. Include liquid retained at the drawing’s sealing, locating and bearing interfaces in the exposure description.
Duplex 2205
Duplex strength and chloride-corrosion resistance.
- Connection priority
- The load path through shoulders, steps and threaded features
- S31803 or S32205
- The specified UNS fixes the chemistry. Solution treatment, section size and the ordered mechanical or corrosion tests establish the final duplex condition. Include liquid retained at the drawing’s sealing, locating and bearing interfaces in the exposure description.
From drawing to documented delivery




- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS N05500 · heat number · ordered condition
- Final-part acceptance
- Lot-linked aging record and mechanical acceptance in the final condition.
- Dimensional record
- Drawing dimensions · Critical fits · Thread gauging
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your K-500 custom fastener enquiry
Questions about K-500 drawing-based special alloy fasteners
Which features control acceptance on a custom part?
The datum system and functional interfaces determine inspection: a locating shoulder, seal seat or short thread can be more important than the largest overall dimension. Keep these features identified on the revision supplied for manufacture.