Carbon steel tube fittings are the economical, high-strength choice for hydraulic and pneumatic tubing in machinery, mobile equipment, machine tools and industrial power units, where the fluid is oil or dry air and the fittings are protected from the weather. Steel bodies and nuts give the strength needed for high hydraulic pressures, and a zinc-plated or phosphated finish protects them against rust.
Raaj Fittings machines carbon steel DIN 2353 bite type fittings, single ferrule compression fittings, flare fittings and union elbows at our two plants in India, in metric and imperial tube sizes, for OEMs, hydraulic system builders and distributors in the Middle East, Europe and the Americas.
| Material | Carbon steel bodies, nuts and rings, machined from bar stock or forgings |
|---|---|
| Surface finish | Zinc-plated or phosphated |
| Fitting types | DIN 2353 / ISO 8434-1 bite type, single ferrule compression, flare fittings, union elbows |
| Tube OD | Metric 3 to 25 mm; imperial ⅛" to 1" |
| End connections | Tube ends; NPT (ASME B1.20.1), BSPT and BSPP (BS 21 / ISO 7-1) threads |
| Certification | EN 10204 3.1 certificate; EN 10204 3.2 on request |
Steel bite type and compression fittings are used with precision seamless cold-drawn steel hydraulic tubing in the normalised condition (for example to EN 10305-1). The tube must be cut square, deburred and fully inserted before the nut is tightened, and the cutting ring or ferrule pre-set as the fitting type requires. Do not mix fittings and rings from different makers on one joint.
Bar stock is verified on receipt and traceable by heat number. Threads are gauge-checked, bodies, nuts and rings are dimensionally inspected, and plating or phosphate coatings are checked visually. Orders are supplied with EN 10204 3.1 certificates, with EN 10204 3.2 certification and third-party inspection by the buyer's nominated agency on request.
Carbon steel tube fittings are supplied zinc-plated, for general rust protection, or phosphated, which gives a matt finish with good lubricity and is a good base for painting.
They are designed for oil and dry air in protected environments. For water, outdoor, coastal or wash-down service, stainless steel 316 tube fittings are recommended.
Use precision seamless cold-drawn steel hydraulic tubing in the normalised condition, of the correct OD and wall for the pressure, cut square and deburred.
Yes. DIN 2353 / ISO 8434-1 bite type fittings are made in zinc-plated or phosphated carbon steel and in stainless steel, in metric tube sizes.