Threaded Socket
What is a Threaded Socket?
A Threaded Socket, also referred to as a Threaded Coupling, is a short pipe fitting used to connect two pipes of the same or different sizes via female threads. Designed for low to medium-pressure piping systems, these fittings allow for easy and secure straight-line pipe connections without welding.
Threaded sockets are commonly used in water pipelines, oil & gas networks, fire protection systems, and compressed air lines, and are available in full, half, and reducing types to suit various piping layouts.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature |
|---|---|
| Size Range | Nominal Size |
| Pressure Ratings | ANSI / ASME Class |
| PN Ratings | |
| Product Types | Threaded Socket |
| Material Options | Carbon Steel |
| Stainless Steel |
Dimensions
| Fitting Type | Nominal Size (NPS) | Outside Diameter (OD) | Wall Thickness (Schedule) | Length (L) | End Connections | Weight per Piece |
|---|---|---|---|---|---|---|
| Threaded Socket | ½” | 21.3 mm | Schedule 40, Schedule 80 | 40 mm | Threaded (NPT, BSP, BSPT, PT) | 200g |
| Threaded Socket | ¾” | 26.7 mm | Schedule 40, Schedule 80 | 50 mm | Threaded (NPT, BSP, BSPT, PT) | 250g |
| Threaded Socket | 1″ | 33.4 mm | Schedule 40, Schedule 80 | 60 mm | Threaded (NPT, BSP, BSPT, PT) | 350g |
| Threaded Socket | 1½” | 48.3 mm | Schedule 40, Schedule 80 | 70 mm | Threaded (NPT, BSP, BSPT, PT) | 550g |
| Threaded Socket | 2″ | 60.3 mm | Schedule 40, Schedule 80 | 80 mm | Threaded (NPT, BSP, BSPT, PT) | 800g |
| Threaded Socket | 2½” | 73.0 mm | Schedule 40, Schedule 80 | 100 mm | Threaded (NPT, BSP, BSPT, PT) | 1.0kg |
| Threaded Socket | 3″ | 88.9 mm | Schedule 40, Schedule 80 | 120 mm | Threaded (NPT, BSP, BSPT, PT) | 1.5kg |
| Threaded Socket | 4″ | 114.3 mm | Schedule 40, Schedule 80 | 140 mm | Threaded (NPT, BSP, BSPT, PT) | 2.0kg |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ (Carbon Steel), 7.9 – 8.0 g/cm³ (Stainless Steel) |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Serrated / Stock / Smooth finish per ASME B16.11 | – |
| Threading Type | Threaded Connection (NPT, BSP, BSPT, PT) | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME B16.11 |
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 – 0.35 |
| Manganese (Mn) | 0.60 – 1.65 |
| Silicon (Si) | 0.15 – 0.80 |
| Chromium (Cr) | 18.0 – 20.0 (Stainless Steel) |
| Nickel (Ni) | 8.0 – 10.5 (SS 304/316) |
| Molybdenum (Mo) | 2.0 – 3.0 (for F316 only) |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
Applications of Threaded Sockets
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is the difference between a full and half coupling?
Are reducing couplings available?
What thread types do you support?
Are threaded couplings reusable?
