Bar Stock Threaded
Pipe Fittings
What are Bar Stock Threaded Pipe Fittings?
Bar Stock Threaded Pipe Fittings are precision-engineered components machined from solid metal bars. These fittings feature threaded ends and are used to connect pipes in small-diameter, high-pressure fluid systems where exceptional strength, dimensional accuracy, and leak resistance are essential.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Types of Bar Stock Threaded Pipe Fittings
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Pipe Size (NPS) | ⅛” to 6” (DN6 – DN150) |
| Pressure Ratings | Class 2000, 3000, 6000, 9000 | |
| PN Ratings | PN16, PN25, PN40, PN64 | |
| Fitting Types (Bar Stock Threaded) | Hex Nipple | Threaded both ends, male-to-male connection |
| Hose Nipple | One threaded end, one hose connection end | |
| Barrel Nipple | Long male-threaded nipple, both ends threaded | |
| Socket | Female-to-female threaded coupling | |
| Plug | Male-threaded closure for pipe ends | |
| Bushing | Male-to-female threaded reducer for pipe connections | |
| Material Options | Stainless Steel | SS 304, SS 304L, SS 316, SS 316L, SS 321 |
| Carbon Steel | ASTM A105, ASTM A350 LF2 | |
| Alloy / Superalloy | Inconel 600/625, Hastelloy C22/C276 | |
| Duplex & Super Duplex | Duplex 2205, Super Duplex 2507 | |
| Other Materials | Monel 400/K500, Nickel 200/201, Titanium (Grade 2, Grade 5), Brass, Copper | |
| Standards & Certifications | ASME / ANSI | ASME B16.11 (Forged Fittings – Socket Weld & Threaded) |
| ASTM | ASTM A182 (SS), ASTM A105 (CS), ASTM B564 (Nickel Alloys) | |
| European Standards | DIN 2950, EN 10241 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, IBR Approved | |
| Design Features | Thread Type | NPT, BSPT, BSPP, ISO Threads |
| Wall Thickness | As per ANSI / ASME B16.11 | |
| Machining | Precision-machined from solid bar stock for strength | |
| Tolerance | As per ASME/ANSI standards | |
| Coating & Surface Finish | Anti-Corrosion Coating | Rust Preventive Oil, Black Oxide |
| Optional Coatings | Zinc Plated, Hot-Dip Galvanized, PTFE | |
| Surface Finish | Machined, Pickled, Polished, Passivated | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Ultrasonic (UT), Magnetic Particle (MPI), Dye Penetrant (DPT) | |
| Destructive Testing | Tensile, Hardness, Impact |
Dimensions
| Fitting Type | Nominal Pipe Size (NPS) | Outside Diameter (mm) | Length (mm) | Thread Type | Details / Options |
|---|---|---|---|---|---|
| Hex Nipple | ⅛” (DN6) | 10.3 | 25 – 35 | NPT, BSPT | Hex body for wrench tightening |
| Hex Nipple | ¼” (DN8) | 13.7 | 30 – 40 | NPT, BSPT | Used in instrumentation & low-pressure piping |
| Hex Nipple | ½” (DN15) | 21.3 | 35 – 50 | NPT, BSPT, BSPP | Standard size for plumbing/industrial |
| Hex Nipple | 1” (DN25) | 33.4 | 50 – 75 | NPT, BSPT | Heavy-duty industrial applications |
| Hex Nipple | 2” (DN50) | 60.3 | 80 – 120 | NPT, BSPT | Large bore connections |
| Hose Nipple | ¼” (DN8) | 13.7 | 40 – 60 | NPT, BSPT | One threaded end, one serrated hose end |
| Hose Nipple | ½” (DN15) | 21.3 | 50 – 80 | NPT, BSPT | For rubber hose connections |
| Hose Nipple | 1” (DN25) | 33.4 | 75 – 100 | NPT, BSPT | Industrial hose coupling |
| Hose Nipple | 2” (DN50) | 60.3 | 120 – 180 | NPT, BSPT | High flow applications |
| Barrel Nipple | ¼” (DN8) | 13.7 | 50 – 75 | NPT, BSPT | Fully threaded, Sch 40 wall |
| Barrel Nipple | ½” (DN15) | 21.3 | 75 – 150 | NPT, BSPT | Available in Sch 40 / Sch 80 |
| Barrel Nipple | 1” (DN25) | 33.4 | 100 – 200 | NPT, BSPT | Extended threaded length |
| Barrel Nipple | 2” (DN50) | 60.3 | 150 – 300 | NPT, BSPT | Long nipple for deeper connections |
| Barrel Nipple | 4” (DN100) | 114.3 | 250 – 600 | NPT, BSPT | Heavy-duty, large bore |
| Socket (Coupling) | ¼” (DN8) | 13.7 | 20 – 30 | NPT, BSPT | Half coupling or full coupling |
| Socket (Coupling) | ½” (DN15) | 21.3 | 30 – 45 | NPT, BSPT | Female threaded both ends |
| Socket (Coupling) | 1” (DN25) | 33.4 | 50 – 65 | NPT, BSPT | Precision machined threads |
| Socket (Coupling) | 2” (DN50) | 60.3 | 80 – 120 | NPT, BSPT | Used in pipelines and manifolds |
| Socket (Coupling) | 4” (DN100) | 114.3 | 150 – 200 | NPT, BSPT | Large bore socket |
| Plug | ¼” (DN8) | 13.7 | 15 – 20 | NPT, BSPT | Square / Hex / Round head |
| Plug | ½” (DN15) | 21.3 | 20 – 30 | NPT, BSPT | Used for sealing female ends |
| Plug | 1” (DN25) | 33.4 | 30 – 40 | NPT, BSPT | Available in stainless / carbon steel |
| Plug | 2” (DN50) | 60.3 | 50 – 70 | NPT, BSPT | For high-pressure closure |
| Plug | 4” (DN100) | 114.3 | 80 – 100 | NPT, BSPT | Heavy-duty plug |
| Bushing | ½” x ¼” | 21.3 x 13.7 | 20 – 30 | NPT, BSPT | Male-to-female reducer |
| Bushing | 1” x ½” | 33.4 x 21.3 | 25 – 35 | NPT, BSPT | Hex or Round design |
| Bushing | 2” x 1” | 60.3 x 33.4 | 35 – 50 | NPT, BSPT | Precision machined |
| Bushing | 3” x 2” | 88.9 x 60.3 | 45 – 65 | NPT, BSPT | Heavy-duty reducer bushing |
| Bushing | 4” x 2” | 114.3 x 60.3 | 55 – 80 | NPT, BSPT | Large bore reduction |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (varies with SS 304/316, Carbon Steel, Alloy Steel) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 35 | % |
| Density | 7.8 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, depending on grade) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 200 – 400 | MPa |
| Corrosion Resistance | Good to Excellent | (depends on material grade) |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.45 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Machined, Polished, Pickled & Passivated (for SS), Black / Coated (for CS) | – |
| Thread Standards | NPT / BSP / BSPT (per ASME B1.20.1 & ISO standards) | – |
| Operating Temperature Range | -46 to 600 | °C (grade-dependent) |
| Pressure Rating | Class 2000 / 3000 / 6000 | ASME B16.11 Standards |
Chemical Composition
| Element | SS 304 | SS 304L | SS 316 | SS 316L |
|---|---|---|---|---|
| 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 |
| 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 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Do you have questions?
What is the advantage of bar stock over forged fittings?
Are custom sizes or threads available?
Can bar stock fittings be used in corrosive environments?
What certifications do these fittings comply with?
