Prestolok push-in bulkhead union — quick-insertion fitting for panel pass-through
TECTUL · Dispatch across Colombia · Exports to Central & South America
Push-in bulkhead union: a fitting with a threaded body and a fixing nut installed into a hole in a panel, cabinet or equipment wall, with push-in ends on both sides to connect pneumatic tube without the line entering through the panel's edge. It is notably heavier than other push-in fittings of the same diameter, due to the additional threaded body and nut. The manufacturer documents 7 diameters, 6 to 12 mm and 1/4″ to 1/2″.
IMPORTANT: reference data — may differ from the physical product; verify with an advisor before buying.
SKU VT-RAC-PASAMUROPRESTO (push-in bulkhead) · 7 metric and imperial diameters · sold by the unit
1. Technical specifications
| Diameter | L [mm] | Weight [g] |
|---|---|---|
| 6 mm | 31.30 | 21 |
| 8 mm | 35.00 | 26 |
| 10 mm | 42.00 | 52 |
| 12 mm | 45.00 | 66 |
| 1/4″ | 31.00 | 20 |
| 3/8″ | 44.00 | 55 |
| 1/2″ | 45.50 | 61 |
IMPORTANT
This technical data sheet is a reference guide to the properties of this product type; it is not a quality certificate for the product you are buying. The measurements, dimensions and physical or geometric characteristics of the product supplied may vary by manufacturer, heat and lot, and may even fall outside the cited standards. If any of these figures is critical to your design or build, verify it with one of our advisors against the physical product or the lot's mill certificate, so you can be fully certain of what you are buying. · Original data sheet: tectul.com/en/conduccion-de-fluidos/racores-y-acoples/ficha-tecnica-pasamuro-prestolok.html
Complete, verified manufacturer table (May 2022 revision). No 4 mm, 1/8″ or 5/16″ references are published for this product.
| Product | Push-in union with a threaded body and nut to pass through a panel |
| Material | Nickel-plated brass threaded body + push-in collet at each end |
| Connection | Push-to-connect on both tube ends; panel fixing by threaded nut |
| Commercial range | 6, 8, 10, 12 mm · 1/4″, 3/8″, 1/2″ |
2. Frequently asked questions
What hole diameter do I need in the panel?
It is not published in the available manufacturer sheet; confirm the recommended drilling diameter for each size with the supplier before machining the panel.
Why does it weigh so much more than a push-in elbow or union of the same diameter?
Because in addition to the body with a push-in collet on both ends, it includes thread and a fixing nut to secure it to the panel — parts the other push-in fittings in this line do not have.
3. Application notes
Feasibility
Suitable for routing a pneumatic line through a panel, cabinet or equipment wall without the tube entering through the edge. Confirm the hole diameter with the supplier before machining.
Installation
Insert the threaded body through the panel hole and tighten the fixing nut on the other side until firmly seated. Insert the tube fully to the stop at each push-in end.
Design
Confirm the hole diameter and maximum compatible panel thickness with the supplier before detailing the machining.
4. Technical notice and limitation of liability
The pressures, dimensions, weights and other characteristics in this sheet are theoretical calculation values obtained from nominal properties published in the standards cited (ASME B36.10-2022, ASME B31.3-2024, ASTM A106/A106M-19a, ASTM A53/A53M-24, API Spec 5L 46th ed.). They guide selection; they are not a certificate of conformity for any given lot.
The actual behavior of each lot varies with manufacturing — wall tolerance (up to −12.5%), out-of-roundness, residual stresses — and with the raw material — chemical composition within the ranges the standard allows, heat-to-heat differences. To certify a lot, the tests defined by its product standard are required: tensile test, flattening test and hydrostatic test, documented in the manufacturer's mill test certificate (MTC), which TECTUL supplies upon request; testing of the lot in an independent laboratory can also be arranged.
These values must not be used as the sole criterion in critical or safety applications, or wherever failure of the line may compromise people, property or the environment: in such cases the design belongs to the project's responsible engineer under the applicable code (ASME B31.3, B31.1 or the one governing the installation), with the design temperature, corrosion allowance and load cases of the actual service. Before deciding with these data, consult our technical team.
Sources
- Ficha de fabricante "Pasamuro Prestolok" (catálogo de racores push-in neumáticos, IMR/TECTUL, revisión mayo 2022): tabla completa de L y peso para 7 diámetros métricos e imperiales
This data sheet is the property of TECTUL, part of the Industrias IMR group. Reproduction without attribution is prohibited. Original document and updates: tectul.com/en/conduccion-de-fluidos/racores-y-acoples/ficha-tecnica-pasamuro-prestolok.