Female Connectors
What are Female Connectors?
Female Connectors are precision fittings used to connect instrument tubing to components or valves via an internal (female) thread. They form a secure, leak-proof seal in high-pressure instrumentation systems and are essential in chemical plants, oil & gas installations, and analytical laboratories.
Asiad Steel Industries is a leading supplier of high-quality Female Connectors, trusted by industries for reliability and precision.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Tube OD | 1/16” to 2” (2 mm to 50 mm) |
| Thread Size | 1/16” to 2” (NPT, BSPP, BSPT, ISO) | |
| Pressure Ratings | Working Pressure | Up to 6000 psi (414 bar) for SS 316 |
| Temperature Rating | -196°C to +400°C (depending on material & thread type) | |
| Fitting Types | Instrumentation Fittings | Female Connector (straight), Female Elbow, Female Tee |
| Material Options | Stainless Steel | SS 304, SS 304L, SS 316, SS 316L |
| Standards & Certifications | ASME / ANSI | ASME B31.1, ASME B31.3 (Process Piping) |
| ASTM | ASTM A182 / A479 (for SS bar & forgings) | |
| ISO / DIN | ISO 8434-1, DIN 2353 (Instrumentation) | |
| Certifications | ISO 9001, PED 2014/68/EU, IBR Approved, NACE MR0175 (for sour service) | |
| Design Features | End Connections | Tube OD × Female Thread (NPT, BSPP, BSPT, ISO) |
| Sealing Mechanism | Metal-to-metal / elastomeric (depending on thread type) | |
| Tolerance | As per ASME/ANSI/ISO instrumentation standards | |
| Coating & Surface Finish | Surface Treatment | Machined, Passivated, Pickled (for SS) |
| Optional Coatings | PTFE, Electropolished (for high-purity applications) | |
| Testing & Inspection | Pressure Testing | 100% Hydrostatic & Pneumatic leak tested |
| Non-Destructive Testing | Dye Penetrant Test (DPT), Ultrasonic (UT) if required | |
| Destructive Testing | Tensile, Hardness (for raw material verification) |
Dimensions
| Tube OD (inches / mm) | Thread Size (NPT / BSPP / BSPT / ISO) | Overall Length (L, mm) | Hex Size (H, mm) | Pressure Rating (psi / bar) |
|---|---|---|---|---|
| 1/16” (1.6 mm) | 1/16″ | 22 | 11 | 6000 psi (414 bar) |
| 1/8” (3.2 mm) | 1/8″ | 26 | 14 | 6000 psi (414 bar) |
| 3/16” (4.8 mm) | 1/8″ | 28 | 14 | 5800 psi (400 bar) |
| 1/4” (6.4 mm) | 1/4″ | 32 | 17 | 5800 psi (400 bar) |
| 5/16” (7.9 mm) | 1/4″ | 34 | 17 | 5500 psi (379 bar) |
| 3/8” (9.5 mm) | 3/8″ | 36 | 19 | 5500 psi (379 bar) |
| 1/2” (12.7 mm) | 1/2″ | 40 | 22 | 5000 psi (345 bar) |
| 5/8” (15.8 mm) | 1/2″ | 44 | 24 | 4800 psi (330 bar) |
| 3/4” (19.0 mm) | 3/4″ | 48 | 30 | 4500 psi (310 bar) |
| 1” (25.4 mm) | 1″ | 56 | 36 | 4300 psi (296 bar) |
| 1 1/4” (31.8 mm) | 1 1/4″ | 64 | 46 | 4000 psi (276 bar) |
| 1 1/2” (38.1 mm) | 1 1/2″ | 72 | 50 | 3800 psi (262 bar) |
| 2” (50.8 mm) | 2″ | 84 | 65 | 3500 psi (241 bar) |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 515 – 750 | MPa (for SS 304 / SS 316) |
| Yield Strength | 205 – 450 | MPa |
| Hardness | 80 – 200 | HB (Brinell, grade-dependent) |
| Elongation | ≥ 30 | % |
| Density | 7.9 – 8.0 | g/cm³ (Stainless Steel) |
| Impact Toughness | ≥ 50 – 70 | J (Charpy V-Notch, at room temp.) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 400 | MPa (depending on size & pressure class) |
| Corrosion Resistance | Excellent in most industrial media | – |
| Thermal Conductivity | 14 – 16 | W/m·K (for SS 316) |
| Coefficient of Thermal Expansion | 16 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 80 – 200 | HB |
| Surface Finish | Machined / Passivated | – |
| Operating Temperature Range | -196 to 600 | °C (material-dependent) |
| Pressure Rating | Up to 6000 psi (414 bar) | ANSI / ASME / ISO Standards |
Chemical Composition
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
| Nitrogen (N) | — | — | ≤ 0.10 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
Applications of Female Connectors
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
Can female connectors be used with compression tube fittings?
What materials are suitable for acidic or corrosive media?
Do female connectors require sealing tape?
Do you supply bulk or small-batch quantities?
