Amigo Impex is a nickel fasteners manufacturer, supplier and exporter based in Mumbai, India, operating since 2013. Cutting, machining, threading, testing and packing are carried out at our Mumbai facility, allowing complete bolting sets to be prepared with the applicable material documentation.
Nickel fasteners are bolting components machined from commercially pure nickel bar supplied to ASTM B160 / ASME SB-160, with nickel at a minimum of 99.0%. The high nickel content provides strong resistance to caustic soda, while Nickel 200 and Nickel 201 are also used in applications involving dry chlorine and hydrogen fluoride. Their commercially pure nickel chemistry can also be advantageous where material purity is important. Nickel 200 is suited to general corrosive service, while the lower carbon content of Nickel 201 makes it more suitable for prolonged exposure to elevated temperatures. Bolts, screws, studs and nuts are machined from certified nickel bar to ASTM B160 / ASME SB-160, which covers Nickel 200 (UNS N02200) and Nickel 201 (UNS N02201). There is no ASTM fastener specification covering commercially pure nickel, so dimensions, head form and thread form are supplied to the dimensional standard called out on the drawing, whether ASME, ISO, DIN, IS or JIS. Head and thread geometry can be produced according to applicable ASME, DIN, ISO, IS and JIS dimensional standards.
Diameters range from M6 to M24 in metric sizes and from 1/4 in to 1-1/2 in in imperial sizes. The range includes black and bright finishes across ten fastener types, from hex bolts and nuts to anchor bolts and eye bolts. Deliveries cover pan-India from Mumbai, with export consignments supplied to the USA, Gulf, Europe and Asia. Pricing is quoted per kilogram and varies according to grade, dimensions, quantity and prevailing nickel raw-material costs. Major applications include pumps and valves, chemical processing, oil and gas and other industrial services, supported by approximately 60 to 70 tonnes of ready stock in Mumbai.
Nickel fastener requirements are primarily determined by the applicable standard, grade and size, along with the required finish and certification. The table below summarises the standard supply range.
A nickel fastener order can involve three documentation layers: the fastener specification for the finished component, the bar standard for the machining stock, and the dimensional standards governing head and thread geometry. DIN 931 and DIN 933 have been superseded by ISO 4014 and ISO 4017, and DIN 934 by ISO 4032, though the DIN callouts remain in common commercial use. The two are not always interchangeable: widths across flats differ at M10, M12, M14 and M22, so confirm which callout the drawing uses before manufacture.
| Standard | Scope |
|---|---|
| ASTM F468 | Nonferrous bolts, hex cap screws and studs 0.250 in to 1.500 in; socket head cap screws size 0 (0.060 in) to 1.500 in; low head socket cap screws size 4 (0.112 in) to 5/8 in |
| ASTM F468M | Metric companion to F468, M6 to M36 |
| ASTM F467 | Nonferrous nuts, 1/4 in to 1-1/2 in |
| ASTM F467M | Metric companion to F467, M6 to M36 |
| ASTM B160 / ASME SB-160 | Nickel rod and bar used as machining stock for Nickel 200 and Nickel 201 fasteners |
| ASTM B162 / ASME SB-162 | Nickel sheet and plate used for washers |
| ASME B18.2.1 / B18.2.2 | Inch-series bolt and nut dimensions |
| ASME B18.21.1 | Inch-series flat and spring lock washer dimensions |
| DIN 912 / 931 / 933 / 934 | Metric socket screw, bolt and nut dimensions |
| DIN 125 / DIN 127 | Metric flat and spring lock washer dimensions |
| ISO 4014 / 4017 / 4032 | Metric hex bolt and nut dimensions |
| IS 1364 | Hexagon head bolt, screw and nut dimensions for Indian drawings |
| JIS B1180 / B1181 | Hex bolt and nut dimensions for Japanese drawings |
Amigo Impex supplies two nickel fastener grades: Nickel 200 and Nickel 201. The principal distinction is their carbon content, which affects their suitability for prolonged service at elevated temperatures.
Nickel 200 fasteners (UNS N02200) contain a minimum of 99.0% nickel, with carbon permitted up to 0.15%. The grade is used in caustic soda plants, chlor-alkali equipment and other applications requiring commercially pure nickel with good corrosion resistance.
Nickel 201 fasteners (UNS N02201) have a maximum carbon content of 0.02%. This lower carbon limit reduces the risk of graphitisation during prolonged exposure to elevated temperatures, making Nickel 201 preferable to Nickel 200 for continuous high-temperature service where the lower carbon grade is specified.
Metric and imperial nickel fasteners can be produced from the applicable certified bar stock, allowing mixed drawing requirements to be consolidated where the grade and specification permit. Sizes outside the standard supply range can be machined to drawing.
| Parameter | Range |
|---|---|
| Metric Diameter | M6 to M24 |
| Imperial Diameter | 1/4 in to 1-1/2 in |
| Bolt and screw length | 1/2 in to 2-1/2 in standard, longer to order |
| Stud bolt length | To drawing, sized to the flange rating and gasket stack |
| Threaded rod length | 1 m and 3 m standard, cut lengths to order |
| Anchor and U-bolt length | To drawing |
| Thread Forms | Metric coarse and fine; UNC, UNF |
| Washers | Flat and spring lock, matched to bolt grade |
| Custom Dimensions | Non-standard diameters, lengths and heads machined to drawing |
Commercially pure nickel can work-harden during machining, so cutting and threading parameters are controlled according to the material condition. The available head and thread configurations can be supplied in both Nickel 200 and Nickel 201, subject to size and specification.
Hex and heavy hex heads for open-spanner joints
Socket heads to DIN 912 where the fastener seats in a counterbore
Button and flat heads for machine screws
Set screws threaded over their full length
Metric coarse and fine threads for DIN and ISO drawings
UNC and UNF threads for inch-series drawings
Both grades can be supplied in the following fastener forms, including nickel alloy bolts and stud bolts for flange and other bolted-joint applications:
Small nickel fastener lots are packed in sealed bags inside labelled cartons, while bulk consignments can be supplied in wooden cases with suitable protective packaging for export. Grade, size, heat number and specification are identified on every package.
Despatch covers pan-India from the Mumbai facility, with export orders supplied to the USA, Gulf, Europe and Asia. Ready-stock items can generally be dispatched within 1 to 2 days, while made-to-order lots typically require around 30 days, subject to grade, dimensions and quantity.
Before packing, every nickel alloy fastener lot undergoes positive material identification, dimensional inspection and thread gauging at the Mumbai facility. The material test certificate incorporates the applicable mill documentation and inspection results, while third-party inspection can be arranged when required. Amigo Impex holds AS 9120B, PED, ISO 9001:2015 and ISO 45001:2018 certifications.
Contact Amigo Impex with the required grade, fastener type, size and quantity for a current quotation.
Request a Quote60–70 tonnes held in Mumbai, with urgent requirements dispatched within one to two days.
AS 9120B, PED, ISO 9001:2015 and ISO 45001:2018, with an MTC on every order.
Cutting, machining, threading, fabrication and testing all handled at our own Mumbai facility.
Original mill certificates plus our own test reports, so every batch can be traced back.
Non-standard sizes and specifications made to order.
Dispatched from Mumbai to every major Indian city, and exported to USA, Gulf, Europe, Asia
Nickel fasteners in this range are bolting components machined from commercially pure nickel bar supplied to ASTM B160 / ASME SB-160 in Nickel 200 (UNS N02200) and Nickel 201 (UNS N02201). Head form, thread form and dimensions follow the ASME, ISO, DIN, IS or JIS standard stated on the drawing. Nickel 200 and Nickel 201 are used where corrosion resistance, caustic-service performance and, for Nickel 201, elevated-temperature capability are required.
No. Nickel alloy fasteners are manufactured from nickel-based material throughout their section, whereas nickel-plated fasteners consist of a different base material with a nickel coating applied to the surface. The two products therefore have different material properties and service characteristics.
ASTM B160 / ASME SB-160 is the governing standard, because it covers Nickel 200 (UNS N02200) and Nickel 201 (UNS N02201) rod and bar, which is the machining stock for these fasteners. ASTM F468 and ASTM F467 are the general nonferrous bolt and nut specifications, but their alloy tables cover only the Monel, Inconel and Hastelloy families and do not include commercially pure nickel, so they cannot be used to certify Nickel 200 or Nickel 201 bolting. Dimensions and thread form are supplied to ASME, ISO, DIN, IS or JIS as required by the drawing.
Nickel 201 is generally preferred over Nickel 200 for prolonged exposure to temperatures above approximately 315 °C because its lower carbon content reduces the risk of graphitisation. Final grade selection should consider the actual operating temperature, service environment and applicable specification.
Metric sizes range from M6 to M24, while imperial sizes start at 1/4". Standard lengths range from 1/2" to 2-1/2", with longer lengths and non-standard dimensions available to drawing. This size range covers common nickel bolt requirements as well as other fastener forms.
Yes, nickel fasteners are widely used in caustic soda service, including applications within chlor-alkali processing. Suitability depends on the specific concentration, temperature, exposure conditions and applicable material requirements.
Yes, Nickel 200 is ferromagnetic at room temperature. Its magnetic behaviour changes as the material approaches its Curie temperature, so magnetic requirements should be considered when the fastener is intended for instrumentation or other applications where magnetic response is important.
Yes, Amigo Impex can machine custom nickel fasteners at the Mumbai facility, including non-standard diameters, lengths, head configurations and thread forms in Nickel 200 and Nickel 201, subject to the required specification and production feasibility.
Nickel fastener assemblies are used where corrosion resistance, material purity or elevated-temperature performance is important. Major application sectors include:
