Bronze static grounding pin, 3/8 UNC thread — grounding for networks and equipment
TECTUL · Dispatch across Colombia · Exports to Central & South America
Threaded bronze pin, a connection point for a grounding cable or clamp on networks, tanks or equipment where static charge must be dissipated (for example, when transferring fuels or flammable liquids). The actual thread is 3/8 UNC (unified coarse), confirmed by the product's commercial sheet; the available manufacturer sheet's standard template generically cites NPT/ASME B1.20.1, which does not apply to this part — a grounding pin is not a fluid-conveyance fitting and its thread follows the usual UNC convention for this type of hardware, not the tapered NPT thread.
Important: Before using these data in engineering, design or installation decisions on systems exposed to mechanical, pressure, rupture, fatigue, impact or water-hammer risk, it is essential to read the technical notice and limitation of liability at the end of this sheet.
SKU VT-59167 (3/8 UNC grounding pin) · sold by the unit
1. Technical specifications
| Product | Threaded bronze pin, a connection point for a grounding cable or clamp |
| Material | Brass bronze |
| Thread | 3/8 UNC (unified coarse) — confirmed in the product's commercial sheet; NOT NPT thread despite the available manufacturer sheet's standard template mentioning it generically |
| Dimensions | L (length) 39.0 mm · C (diameter/head) 16.0 mm · weight 45 g |
| Application | Networks, tanks or equipment requiring static charge dissipation, typically during fuel or flammable liquid transfer |
The source manufacturer sheet reuses for this pin the same "NPT threaded connection per ANSI/ASME B1.20.1" box used across the whole threaded bronze fitting series; that box does not apply here. This sheet documents the actual thread (3/8 UNC) confirmed by the product's commercial sheet.
2. Frequently asked questions
Is this pin's thread NPT?
No. It is 3/8 UNC (unified coarse), confirmed by the product's commercial sheet. The available manufacturer sheet's standard template mentions NPT generically, but it does not apply to this part.
What is a grounding pin used for?
As an anchor point for a grounding cable or clamp on networks, tanks or equipment, to dissipate the static charge that builds up when transferring liquids —especially flammable ones— and reduce spark risk.
3. Application notes
Feasibility
Suitable as a grounding point on liquid-transfer networks, tanks and equipment, especially for flammable liquids. It is not a fluid-conveyance fitting: it has no internal flow passage.
Installation
Thread with 3/8 UNC into the designated point on the equipment or network; connect the grounding cable or clamp ensuring good electrical contact, free of paint or rust on the contact surface.
Design
Selecting the grounding system (maximum allowable resistance, number of points) is the designer's responsibility per the applicable electrical code (NTC 2050/RETIE in Colombia or other); this pin is only the mechanical connection point.
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 "Pin de Estática" (catálogo de accesorios de bronce, IMR/TECTUL, revisión marzo 2022): dimensiones L, C y peso
- Página de producto TECTUL "Pin de Estática Bronce 3/8 UNC" (SKU VT-59167), previews/conduccion-de-fluidos/racores-y-acoples/pin-de-estatica.html: confirma rosca real 3/8 UNC
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-pin-de-estatica.