Tungsten fasteners are specialized bolts, screws, nuts, washers and pins designed for high-temperature, vacuum and high-density applications. They are selected where conventional metal fasteners may lose strength, deform or become dimensionally unstable.
High-Temperature Stability
Tungsten maintains strength and dimensional stability under demanding thermal conditions.
Low Thermal Expansion
Minimal dimensional change helps support precise assemblies during repeated heating and cooling.
High Density and Wear Resistance
Tungsten provides reliable performance in applications requiring weight, hardness or resistance to surface wear.
Suitable for Vacuum and Inert Atmospheres
Because tungsten can oxidize at high temperatures in air, it is commonly used in vacuum or protective atmospheres.
Tungsten Bolts and Screws
Tungsten bolts and tungsten screws are used to secure heating elements, heat shields and structural parts in high-temperature or vacuum equipment. Custom head styles, thread sizes and dimensions can be manufactured according to drawings.
Tungsten Nuts
Tungsten nuts are commonly paired with matching bolts to maintain reliable fastening in vacuum, inert-gas and high-temperature environments. Thread accuracy and assembly clearances should be selected according to the operating conditions.
Tungsten Washers
Tungsten washers help distribute fastening loads and support dimensional stability in furnace assemblies, thermal processing equipment and other demanding installations. Custom inner diameters, outer diameters and thicknesses are available.
Tungsten Pins
Tungsten pins are suitable for positioning, alignment and component support where high-temperature stability and wear resistance are required. GEMEI can produce locating pins and dowel pins with custom diameters, lengths and surface finishes.
GEMEI supplies custom tungsten fasteners, including tungsten nuts and bolts, washers and pins. Send us your drawings, thread standards, quantities and operating conditions for a quotation.
GEMEI manufactures custom tungsten fastening components according to customer drawings, thread standards and application requirements. Each production stage is controlled to maintain material consistency, dimensional accuracy and reliable assembly performance.
Manufacturing Capabilities
Powder metallurgy and sintering
CNC turning and precision thread machining
Drilling, chamfering and custom head machining
Grinding and surface finishing
Small-batch prototypes and repeat production
Quality Control
Raw material and composition verification
Diameter, length and thread inspection
Thread gauge and fit checking
Surface and visual inspection
Dimensional inspection according to drawings
Batch identification and production traceability
Inspection reports available upon request
Special attention is given to thread accuracy and surface condition because tungsten materials are hard and require controlled machining. Before shipment, tungsten bolts, tungsten screws and matching nuts are inspected against the agreed specifications.
GEMEI supplies custom tungsten fasteners, including tungsten bolts, tungsten screws, tungsten nuts, washers and pins. Material, thread type, dimensions and surface condition can be selected according to the operating temperature, mechanical load and installation environment.
| Specification | Available Options |
| Fastener Types | Bolts, screws, nuts, washers and pins |
| Material Options | Pure tungsten, tungsten heavy alloy or doped tungsten |
| Thread Standards | Metric, UNC, UNF or custom threads |
| Head Styles | Hex head, socket head, flat head or custom designs |
| Dimensions | Standard or drawing-based sizes |
| Surface Condition | Machined, ground or polished |
| Dimensional Tolerance | According to drawings or agreed specifications |
| Custom Processing | Turning, drilling, threading, grinding and chamfering |
| Inspection Documents | [MTC / dimensional report / inspection report—customer to confirm] |
Pure tungsten is suitable for applications requiring high-temperature stability and dimensional accuracy. Tungsten heavy alloys provide improved toughness and machinability, while doped tungsten may be selected for demanding thermal cycling conditions.
GEMEI can also supply matching tungsten nuts and bolts, tungsten washers and tungsten pins as complete fastening sets.
GEMEI can manufacture tungsten bolts, tungsten screws, tungsten nuts, tungsten washers, tungsten pins and other custom fastening components according to drawings.
Yes. Dimensions, thread standards, head styles, surface finishes and machining details can be customized according to the assembly and operating requirements.
Pure tungsten is suitable for high-temperature stability, while tungsten heavy alloys offer improved toughness and machinability. Doped tungsten may be selected for applications involving repeated thermal exposure.
Yes. Tungsten fasteners are commonly used in vacuum, inert-gas and high-temperature equipment. Direct exposure to oxidizing atmospheres at elevated temperatures should be evaluated carefully.
Please provide the fastener type, material, thread standard, dimensions, quantity, operating temperature, atmosphere and technical drawing.
Yes. GEMEI can manufacture matching tungsten nuts and bolts, washers and pins as complete fastening sets based on the required thread and dimensional specifications.
Material certificates, dimensional inspection reports and other documents may be supplied according to the order requirements and GEMEI’s available inspection capabilities.
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