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PG Cable Gland Size Chart: Cable Diameter Guide for PG7–PG48
PG cable gland searches often look simple: a buyer asks for PG7, PG11 or PG16 and expects a single answer. In practice, the PG number identifies the thread family, while the cable outer diameter determines which sealing range is needed. A proper selection must therefore match three details: the finished cable OD, the enclosure’s PG-thread requirement and the exact gland insert range. This guide explains how to use the Hongxiang nickel-plated brass PG catalogue data without treating a thread size as a one-size-fits-all cable solution.
The catalogue’s standard metal PG glands use a nickel-plated brass body, PA66 nylon claw, EPDM or silicone sealing components and EPDM or silicone O-ring. The listed protection level is IP68 at 10 bar, with a normal working temperature of -40°C to 100°C (short-term 120°C). A separate high-temperature metal series covers -40°C to 200°C.
1. Why the Same PG Thread Can Have Different Cable Ranges
A PG11 thread does not automatically mean one cable diameter. Hongxiang lists PG11 standard options for 4–8 mm, 5–10 mm and 6–12 mm cables. The installer chooses the version by cable jacket diameter, not merely by the opening in the enclosure. This is especially important for control cable, multicore cable and assemblies where small changes in jacket construction can move the actual OD by several millimetres.
2. Hongxiang PG Cable Gland Size Chart
| PG Thread | Cable OD Range (listed options) | Thread OD |
|---|---|---|
| PG7 | 2–5 mm; 3–6.5 mm; 4–8 mm | 12.5 mm |
| PG9 | 3–6 mm; 4–8 mm; 5–10 mm | 15.2 mm |
| PG11 | 4–8 mm; 5–10 mm; 6–12 mm | 18.6 mm |
| PG13.5 | 5–10 mm; 6–12 mm; 10–14 mm | 20.4 mm |
| PG16 | 4–8 mm; 6–12 mm; 10–14 mm; 12–16 mm | 22.5 mm |
| PG19 | 10–14 mm; 12–16 mm | 25.0 mm |
| PG21 | 4–8 mm; 12–16 mm; 13–18 mm; 15–22 mm | 28.3 mm |
| PG29 | 15–22 mm; 18–25 mm; 22–30 mm | 37.0 mm |
| PG36 | 18–25 mm; 22–30 mm; 25–33 mm; 32–38 mm | 47.0 mm |
| PG42 / PG48 | 30–35 / 32–38 mm; 35–40 / 37–44 mm; 42–52 mm | 54.0 / 59.3 mm |
Table 1. Hongxiang standard PG nickel-plated brass gland cable OD ranges and thread diameters.
3. Use the Cable OD as Your First Filter
Suppose the cable jacket measures 6.2 mm. The catalogue includes PG7 3–6.5 mm, PG9 3–6 mm, PG11 4–8 mm and other options that may overlap in cable range. The final choice is not determined by OD alone because the enclosure must also accept the required thread. If the panel is already designed for PG7, the PG7 3–6.5 mm option is the relevant starting point.
For a 13–18 mm cable, the standard series lists PG21 13–18 mm, while PG25 includes 15–22 mm and PG29 includes 15–22 mm or 18–25 mm options. The cable diameter and layout may point to different acceptable choices, but the enclosure thread must remain the deciding compatibility check. Never assume that a larger PG thread is automatically a better seal.
4. PG Sizes for Common Industrial Planning
4.1 PG7, PG9 and PG11 for Smaller Cables
These sizes cover small control, signal and instrument cable ranges. PG7 offers options from 2–5 mm through 4–8 mm; PG9 covers 3–6 mm through 5–10 mm; PG11 covers 4–8 mm through 6–12 mm. The overlap is useful for OEM designs, but it makes exact OD measurement essential.
4.2 PG13.5, PG16 and PG21 for Medium Entries
For medium entries, the catalogue shows PG13.5 from 5–10 mm to 10–14 mm, PG16 from 4–8 mm to 12–16 mm, and PG21 from 4–8 mm to 15–22 mm in listed variants. These ranges should be quoted with the exact model code rather than only the thread name.
4.3 PG29 to PG48 for Larger Cables
The larger PG series covers cable ranges from 15–22 mm on selected PG29 models through 42–52 mm on a PG48 option. For large feeders, confirm the equipment opening, spanner clearance, thread length and cable bend arrangement before choosing the gland.
Frequently Asked Questions
Conclusion: Measure OD, Match the Range, Verify the Thread
PG cable gland selection works best when the thread and cable OD are treated as separate technical checks. Measure the jacket, match it to the exact listed range, verify the enclosure thread, then request the correct model code and drawing. Our technical team provides sizing confirmation, model codes and catalogue data for all PG gland series.
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