Espárragos y varillas roscadas
Special alloy fasteners
Stud bolts are headless fasteners threaded along their full length or at both ends. Used with compatible nuts and, where specified, washers, they clamp flanges, valve bonnets and equipment covers together.
- Diámetro métrico
- M4–M100
- Diámetro en pulgadas
- 1/4″–4″
- Sistemas de rosca
- Métrica · UNC · UNF · 8UN · UNJ
- Formas
- Rosca completa · Doble extremo · Extremo para cuerpo roscado
- Materiales
- Aleaciones de níquel · Aceros dúplex · Titanio
MTC EN 10204 3.1 · Trazabilidad de colada
Find your material.
Search the grade or UNS on your specification.
Normas de producto y rosca
Check the product geometry, thread form and flange assembly requirements against your drawing.
Dimensions · metricDIN 976-1Metric fully threaded studs+
Defines the metric fully threaded stud form. Specify the nominal diameter, length and thread pitch in your order.
Dimensions · inchASME B18.31.2Continuous-thread, double-end and flange bolting studs+
Use the specified stud form and its length convention when preparing the drawing and parts list.
Threads · metricASME B1.13MMetric M-profile threads+
Metric thread profile, pitch and tolerance requirements for compatible mating parts.
Threads · inchASME B1.1-2024UNC · UNF · 8UN · UNJ+
Unified inch thread series, profiles and fit classes. Include the thread designation and class with the drawing.
Flange assembly referenceASME B16.5Pipe flanges and fittings · NPS ½–24+
Includes flange bolting requirements and dimensional recommendations. Identify the flange size and pressure class.
Flange assembly referenceASME B16.47Large-diameter steel flanges · NPS 26–60+
Specify the flange series, size and pressure class to identify the connection geometry.
Thread manufacturing methods +
Rolled threads
Threads formed by displacement of material. The alloy condition, tooling and thread profile define the rolling route.
Cut threads
Threads machined into the stock, including special pitches and drawing-specific end configurations.
Special geometry & surface finish +
Tap-end engagement, reduced shanks, unequal thread lengths and special end details can be included in your drawing. Add any specified PTFE/Xylan coating or passivation requirement to the enquiry.
Studs & threaded rods: what’s the difference?
Compare the threaded form and how it connects to the assembly.
Espárrago totalmente roscado
Threaded throughout and supplied to a finished part length.
Commonly assembled with a nut at each end.
Varilla roscada
Continuous thread supplied as rod for cutting to length.
For cut pieces, specify the finished length and end finish.
Espárrago de sujeción de doble extremo
Two threaded ends with a plain shank between them.
Nuts clamp the assembly from both ends.
Espárrago con extremo para cuerpo roscado
One end screws into a tapped component; the other takes a nut.
Specify the engagement length and fit of the tap end.
End-to-end length includes the end points. First-full-thread to first-full-thread length excludes them. Identify the required measurement on your drawing or order.
Guía de dimensiones
Cargando modelo 3D…
Arrastre para girar · Use la rueda para ampliar o reducir
Illustrative model · Simplified threads
Dimensions & thread specification +
| Feature | Rosca completa | Double / tap end |
|---|---|---|
| d | Nominal thread diameter | |
| L | Overall end-to-end length in the diagram above | |
| b₁ / b₂ | Continuous thread | Threaded length at each end |
| Mating nut | Same nominal diameter, pitch and compatible thread form | |
Quality & documentation
EN 10204 3.1 MTC, heat traceability and mechanical test results with each shipment.
Certificado de material
Inconel 625 · ejemplo histórico de certificado de alambre en bobina
Informe de laboratorio
Inconel 718 · Composición química, tracción y dureza
Embalaje identificado
Registros de colada y lote vinculados al envío
Requisitos adicionales de inspección +
PMI, third-party inspection and witness testing can be included in the order. Specify any UT/PT procedure, acceptance criteria, hardness limits or heat-treatment records required by your project.
Prepare su consulta
Send your drawing and quantity. Without a drawing, include these details.
- Material
- Grado / UNS
- Medida
- Diámetro × longitud
- Rosca
- Metric / inch
- Cantidad
- Piezas por medida
Include the specified material condition.
Add the stud form and threaded end lengths.
Pitch or TPI, thread form and class.
Attach a parts list for multiple items.
Add the governing material or finished-stud specification and required inspection documents.
Send your drawing or BOMIndustries we serve.
Complete the connection.
One drawing. One coordinated quotation.
Studs, nuts and washers can be quoted together by assembly or BOM line.
Photo credits
- Oil and gas — BYBOLT · User-supplied Google Flow image · . Web compression and display crop.
- Offshore and marine — BYBOLT · User-supplied Google Flow image · . Web compression and display crop.
- Chemical processing — BYBOLT · User-supplied Google Flow image · . Web compression and display crop.