Tie rods with rolled threads at both ends
Made to drawing: diameter and length specified in the enquiry, subject to manufacturing feasibility. Two rolled threaded ends and a smooth shank smaller than the thread major diameter.
Rods and tie rods
- Execution
- Rolled threaded ends
- Thread
- Metric / inch
Technical drawing and legend
Not to scale. Chamfers, transitions and thread runout according to the supply drawing.
- d
- Nominal thread diameter; actual major diameter depends on the thread tolerance.
- dg
- Smooth shank diameter, smaller than the thread major diameter in this execution. Dimension and tolerance according to the supply drawing.
- a
- Left-hand threaded portion shown in the diagram; specify any incomplete thread/runout separately.
- b
- Right-hand threaded portion shown in the diagram; not necessarily equal to a.
- L
- Overall end-to-end length, specified in the enquiry.
Threads and dimensions
| System | Designation | Required specification |
|---|---|---|
| Metric coarse | M | Nominal diameter and pitch P in mm |
| Metric fine | M × P | Pitch must be specified explicitly |
| UNC / UNF / 8UN | Inch | Diameter, series, threads per inch (TPI) and thread class |
| Whitworth | Inch | Specify the series; not automatically interchangeable with UNC/UNF |
There is no fixed selection of diameters or lengths: state the required dimensions and attach the drawing. Feasibility depends on material, manufacturing process and required tolerances.
Specify d, dg, a, b and L separately. There is no universal value for dg: it depends on blank preparation and thread rolling. Specify the handedness and pitch of each end.
Materials and finishes
| Material / specification | Grades and conditions |
|---|---|
| Carbon and alloy steels | Specify property class, steel and treatment. Custom executions; material designation does not automatically establish a mechanical property class. |
| A2 and A4 stainless steel | Specify execution and property class; documented by Piscetta, King and Tobsteel. |
| ASTM A193 | B7, B7M, B16; B8 and B8M class 1 or 2; B8A, B8MA, B8R, B8RA. Specify grade, class and project requirements. |
| ASTM A320 | L7, L7M, L43; B8 and B8M class 1 or 2; B8A, B8MA. Requirements and testing according to specification. |
| ASTM A453 grade 660 | Specify class and metallurgical condition in the enquiry. |
| Brass to drawing | Double-ended tie rods documented by Magnani; verify thread rolling and shank geometry for the requested alloy. |
| Other materials to drawing | 42CrMo4, 25CrMo4, 41CrS4, 32CrB4, S355J2 and AISI 304/316 stainless documented by Bonfatti for partly threaded tie rods. Verify the requested rolled execution for each material. |
Materials, ASTM grades and classes are separate alternatives, not combinations available for every diameter, pitch or process. For rolled tie rods, manufacturability and final properties require verification. Dueemme confirms execution and availability in the quotation.
Finishes
Plain/natural; for steels, electroplated zinc, hot-dip galvanizing, zinc-nickel, phosphating or PTFE/Xylan coatings according to specification. Select coating, thickness and thread tolerance compatible with material, class and service; not every finish applies to every variant.
Supply specification
Tolerances and inspection
Specify the thread standard, tolerance class, condition before/after coating and required inspection. Do not apply a single tolerance to metric threads, inch threads, polymers and rolled executions. Approved drawing dimensions and tolerances govern custom parts.
Oil & gas service and documentation
State the project specification, full grade and class, service temperature and environment, coating, marking and required documentation. Any NACE/ISO 15156, PED or inspection-certificate requirements must be explicitly agreed; an ASTM designation alone does not establish compliance.
Documentation
Download Dueemme data sheet ↓| Document | Status |
|---|---|
| Declaration of conformity | Subject to order agreement |
| Material certificate | Subject to order agreement |
| EN 10204 2.2 test report | Subject to order agreement |
| EN 10204 3.1 inspection certificate | Subject to order agreement |
| Dimensional inspection report | Subject to order agreement |
| Coating report | Subject to order agreement |
| Other documentation | Subject to order agreement |
Batch documents are not automatically included: specify your requirements in the RFQ.
Request a quotation
State diameter, pitch or thread series, required length, quantity, material, class, finish and tolerances. For threaded ends, attach a drawing specifying both thread portions and the shank diameter.
Send enquiry