--- title: Steel Fittings | Asmuss description: Black steel Unions are used in a wide range of make-and-break joints such as filters, valves, hoses, machinery etc. --- [![Asmuss](https://www.asmuss.co.nz/hubfs/Logo.svg "Asmuss")](https://www.asmuss.co.nz/) ©2021 Asmuss Group of Companies Search: ###### [Steel](https://www.asmuss.co.nz/steel) | [FITTINGS ](https://www.asmuss.co.nz/steel/products/fittings)| STEEL Fittings  ### OUR RANGE ![Black Mild Steel Female-Female Unio](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-FF%20Union.png) Black Mild Steel Female-Female Union ![Black & Galvanized Mild Steel Female-Female Elbow](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20FF%20Elbow.png) Black & Galvanized Mild Steel Female-Female Elbow ![Black & Galvanized Mild Steel Male-Female Elbow](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Black%20Galve%20Mild%20Steel%20MF%20Elbow-1.png) Black & Galvanized Mild Steel Male-Female Elbow ![Black & Galvanized Mild Steel Nipple](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Nipple.png) Black & Galvanized Mild Steel Nipple ![Mild Steel Reducing Nipple](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Reducing%20Nipple.png) Black & Galvanized Mild Steel Reducing Nipple ![Steel Fittings-Mild Steel Hexagon Pap](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Hexagon%20Pap.png) Black Mild Steel Hexagon Pap ![Steel Fittings-Mild Steel Equal Tee](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Equal%20Tee.png) Black & Galvanised Mild Steel Equal Tee ![Steel Fittings-Black Mild Steel Reducing Tee](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Black%20Galve%20Mild%20Steel%20Reducing%20Tee.png) Black Mild Steel Reducing Tee ![Black Mild Steel Half Socket](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Pap.png) Black Mild Steel Half Socket ![Black Mild Steel Profile Socket](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Profile%20Socket.png) Black Mild Steel Profile Socket ![Black & Galvanized Mild Steel Socket](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Socket.png) Black & Galvanized Mild Steel Socket ![Black Mild Steel Reducing Socket](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Reducing%20Socket.png) Black Mild Steel Reducing Socket ![Black & Galvanised Mild Steel Hexagon Bush](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Black%20Mild%20Steel%20Bush.png) Black & Galvanised Mild Steel Hexagon Bush ![Black & Galvanised Mild Steel Plug](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Plug.png) Black & Galvanised Mild Steel Hexagon Head Plug ![Black & Galvanised Mild Steel Square Head Plug](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Square%20Head%20Plug.png) Black & Galvanised Mild Steel Square Head Plug ![Black & Galvanised Mild Steel Cap](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Black%20Mild%20Steel%20Cap.png) Black & Galvanised Mild Steel Cap ![M-F Bend 90](https://www.asmuss.co.nz/hubfs/M-F%20Bend%2090.jpg) Black & Galvanised Mild Steel Male-Female Bend 90° ![Black & Galvanised Mild Steel Barrel Nipple](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Black%20Mild%20Steel%20Barrel%20Nipple.png) Black & Galvanised Mild Steel Barrel Nipple ![Steel Fittings-Mild Steel Close Nipple-1](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Close%20Nipple-1.png) Black Mild Steel Close Nipple ![Black & Galvanised Mild Steel Barrel Piece](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Barrel%20Nipple.png) Black & Galvanised Mild Steel Barrel Piece ![Black Mild Steel Blank End](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Black%20Mild%20Steel%20Blank%20End.png) Black Mild Steel Blank End ![Galvanised Mild Steel Hose Tail](https://www.asmuss.co.nz/hubfs/Steel%20Fittings-Mild%20Steel%20Hose%20Tail.png) Galvanised Mild Steel Hose Tail ### SPECIFICATIONS ###### **STEEL UNIONS** Black steel Unions are used in a wide range of make-and-break joints such as filters, valves, hoses, machinery etc.; general piping installations requiring periodic disconnections; high or low pressure assemblies in air, oil, gas and water. Available in Steel-Steel, Steel-Bronze and Bronze-Bronze seats in Female-Female and Male-Female types.   ###### **SEATINGS** Ball to Cone Seating in the following combinations: **Steel-Steel** This is a general purpose combination recommended where vibration is present. The seats are Integral and therefore are the most economically priced. This union will suit almost any application. Zinc coating improves the efficiency of the joints to a marked degree where corrosion is present. **Steel-Bronze** A good seat combination where corrosion due to the material used in the line or where condensation is present and when periodic disconnection is required. Zinc coating improves the efficiency of the joint **Bronze-Bronze** Should corrosion – due to material in the pipe line or condensation be a major factor, and where consistent disconnection is required, this seat combination is advised. Ideally suited to steam lines. Zinc coating improves the corrosion resistance of the seat area.   **THREADING - Taper threads only** External (R) and internal (RC) series to AS 1722 Part 1. ### PRODUCT ENQUIRY ![Screen Shot 2020-11-20 at 9.25.09 AM](https://www.asmuss.co.nz/hubfs/Screen%20Shot%202020-11-20%20at%209.25.09%20AM.png) Download our Steel Fittings catalogue [![Download](https://hubspot-no-cache-ap1-prod.s3.amazonaws.com/cta/default/7120897/d1eb9c19-4fc9-4e6e-967d-fb5cb9245b48.png)](https://hubspot-cta-redirect-ap1-prod.s3.amazonaws.com/cta/redirect/7120897/d1eb9c19-4fc9-4e6e-967d-fb5cb9245b48) ![Screen Shot 2020-11-20 at 9.25.09 AM](https://www.asmuss.co.nz/hubfs/Screen%20Shot%202020-11-20%20at%209.25.09%20AM.png) Download our full Steel catalogue [![Download](https://hubspot-no-cache-ap1-prod.s3.amazonaws.com/cta/default/7120897/6adc5a13-8001-4aaa-81d8-d2b7812956f6.png)](https://hubspot-cta-redirect-ap1-prod.s3.amazonaws.com/cta/redirect/7120897/6adc5a13-8001-4aaa-81d8-d2b7812956f6) ### STEEL PRODUCTS ![AdobeStock_407887807](https://www.asmuss.co.nz/hs-fs/hubfs/AdobeStock_407887807.jpeg?) Steel ![AdobeStock_984350282](https://www.asmuss.co.nz/hs-fs/hubfs/AdobeStock_984350282.jpeg?) Pipe ![Fittings](https://www.asmuss.co.nz/hs-fs/hubfs/Asmuss%20Pictures%20183.jpg?width=263&name=Asmuss%20Pictures%20183.jpg) Fittings ![Fastenings](https://www.asmuss.co.nz/hs-fs/hubfs/Fastenings.jpeg?) Fastenings ![Engineering Supplies](https://www.asmuss.co.nz/hs-fs/hubfs/Engineering%20Supplies.jpeg?width=5760&height=3840&name=Engineering%20Supplies.jpeg) Engineering Supplies ![Fencing](https://www.asmuss.co.nz/hs-fs/hubfs/1D4E6978.jpg?width=263&name=1D4E6978.jpg) Fencing ### STEEL CAPABILITIES [![Internal - Asmuss Christcfffhurch (47)](https://www.asmuss.co.nz/hubfs/Internal%20-%20Asmuss%20Christcfffhurch%20(47).png?) ](https://www.asmuss.co.nz/steel/capability/construction) ### Steel Construction Our Steel is procured from the most reputable mills around the world, to certify product quality and traceability. [ Learn More ](https://www.asmuss.co.nz/steel/capability/construction) [![Manufacturing and Engineering (6)](https://www.asmuss.co.nz/hubfs/Manufacturing%20and%20Engineering%20(6).jpg?) ](https://www.asmuss.co.nz/steel/capability/civil) ### Steel Civil We can source unique / non-standard product as well as meet large project requirements. [ Learn More ](https://www.asmuss.co.nz/steel/capability/civil) [![Steel - Civil (4)](https://www.asmuss.co.nz/hubfs/Steel%20-%20Civil%20(4).jpg?) ](https://www.asmuss.co.nz/steel/capability/manufacturing-engineering) ### Manufacturing and Engineering We are proficient at meeting tight lead times, preserving material integrity and offering competitive pricing. 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