Unifit Fastener is a reliable manufacturer and exporter of high-end stainless steel tube plugs, which have a good, accurate finish, dimensions, and good material strength. Our products are of high quality, which is why we offer a set of Stainless Steel 304 Expandable Tube Plugs, where we pay much attention to the needs of our customers and set the products according to the strict industry standards.
Our professionals work with high-quality steel to manufacture Stainless Steel 316 Boiler Tapered Tube Plugs, which will perform with long durability and high reliability. The Stainless Steel 310 Threaded Tapered Tube Plugs range is made using the best possible materials that provide durability, lightweight, and amazing tensile strength.
Unifit Fastener is also the supplier of Stainless Steel 317 One-Piece Tube Plugs, which are produced by skilled workers and are usually supplied in their annealed form to allow easier working. Our Stainless Steel 316Ti Tapered Metal Tube Plugs and duplex steel tube plugs are of international quality and are manufactured using high-quality raw materials.
We also offer Stainless Steel 347 Heat Exchanger Tube Plugs, which are reputed to be of robust performance, but they are quite tough and therefore need to be handled with caution. Our Stainless Steel 904L Pin Tube Plugs are available in applications that are highly demanding and can be used in cryogenic applications up to 800°F (427°C).
| Specification | Details |
|---|---|
| Diameter (Min–Max) | 0.375 in (9.52 mm) – 2.5 in (63.5 mm) |
| Length | Up to 6 in (152.4 mm) |
| Maximum Pressure | 150 PSI |








| Tube OD | Gauge | A Small End (in) | B Large End (in) | L Length (in) |
|---|---|---|---|---|
| 1/4″ | 18–24 | 0.141″ | 0.235″ | 1-1/4″ |
| 3/8″ | 12–24 | — | — | — |
| 3/8″ | 15–24 | 0.213″ | 0.371″ | 1-3/4″ |
| 1/2″ | 13–15 | — | — | — |
| 1/2″ | 15–24 | 0.337″ | 0.495″ | — |
| 5/8″ | 12–14 | — | — | — |
| 5/8″ | 14–24 | 0.449″ | 0.625″ | — |
| 3/4″ | 10–14 | — | — | — |
| 3/4″ | 14–24 | 0.564″ | 0.750″ | — |
| 7/8″ | 10–13 | — | — | — |
| 1″ | 8–9 | — | — | — |
| 7/8″ | 15–24 | 0.706″ | 0.875″ | — |
| 1″ | 10–15 | — | — | — |
| 1″ | 13–18 | 0.776″ | 0.934″ | — |
| 1″ | 18–24 | 0.892″ | 1.050″ | — |
| 1-1/8″ | 13–17 | — | — | — |
| 1-1/8″ | 15–24 | 0.949″ | 1.125″ | 2″ |
| 1-1/4″ | 10–14 | — | — | — |
| 1-1/4″ | 13–19 | 1.010″ | 1.186″ | — |
| 1-1/4″ | 19–24 | 1.147″ | 1.323″ | — |
| 1-1/2″ | 10–24 | 1.200″ | 1.495″ | 3″ |
| 1-1/2″ | 14–24 | 1.305″ | 1.600″ | — |
| 1-3/4″ | 6–13 | — | — | — |
| 1-3/4″ | 14–22 | 1.575″ | 1.870″ | — |
| 2″ | 6–13 | — | — | — |
| 2″ | 12–22 | 1.700″ | 1.995″ | — |
| 2-1/4″ | 6–13 | 1.805″ | 2.100″ | — |
| 2-1/2″ | 5–18 | 2.000″ | 2.375″ | — |
| 2-3/4″ | 4–10 | 2.232″ | 2.500″ | — |
| 3″ | 5–12 | 2.524″ | 2.834″ | 4″ |
| 3″ | 10–23 | 2.625″ | 3.000″ | — |
| 3-1/4″ | 7–14 | 2.875″ | 3.125″ | — |
| 3-1/4″ | 13–23 | 3.010″ | 3.250″ | — |
| 3-1/2″ | 7–12 | 3.125″ | 3.375″ | — |
| 3-1/2″ | 13–23 | 3.260″ | 3.500″ | — |
| 3-3/4″ | 5–12 | 3.274″ | 3.567″ | — |
| 3-3/4″ | 13–23 | 3.510″ | 3.750″ | — |
| 4″ | 5–12 | 3.524″ | 3.817″ | — |
| 4″ | 13–23 | 3.782″ | 4.000″ | — |
| Metal Tapered Tube Plugs – Tube Plug Sizing Chart | ||||
|---|---|---|---|---|
| Tube OD | Gauge | Dimension (Inches) | ||
| “A” | “B” | “L” | ||
| Small End | Large End | Length | ||
| 1/4″ | 18-24 | 0.141″ | 0.235″ | 1-1/4″ |
| 3/8″ | 12-24 | |||
| 3/8″ | 15-24 | 0.213″ | 0.371″ | 1-3/4″ |
| 1/2″ | 13-15 | |||
| 1/2″ | 15-24 | 0.337″ | 0.495″ | |
| 5/8″ | 12-14 | |||
| 5/8″ | 14-24 | 0.449″ | 0.625″ | |
| 3/4″ | 10-14 | |||
| 3/4″ | 14-24 | 0.564″ | 0.750″ | |
| 7/8″ | 10-13 | |||
| 1″ | 8-9 | |||
| 7/8″ | 15-24 | 0.706″ | 0.875″ | |
| 1″ | 10-15 | |||
| 1″ | 13-18 | 0.776″ | 0.934″ | |
| 1″ | 18-24 | 0.892″ | 1.050″ | |
| 1-1/8″ | 13-17 | |||
| 1-1/8″ | 15-24 | 0.949″ | 1.125″ | 2″ |
| 1-1/4″ | 10-14 | |||
| 1-1/4″ | 13-19 | 1.010″ | 1.186″ | |
| 1-1/4″ | 19-24 | 1.147″ | 1.323″ | |
| 1-1/2″ | 10-24 | 1.200″ | 1.495″ | 3″ |
| 1-1/2″ | 14-24 | 1.305″ | 1.600″ | |
| 1-3/4″ | 6-13 | |||
| 1-3/4″ | 14-22 | 1.575″ | 1.870″ | |
| 2″ | 6-13 | |||
| 2″ | 12-22 | 1.700″ | 1.995″ | |
| 2-1/4″ | 6-13 | 1.805″ | 2.100″ | |
| 2-1/2″ | 5-18 | 2.000″ | 2.375″ | |
| 2-3/4″ | 4-10 | 2.232″ | 2.500″ | |
| 3″ | 5-12 | 2.524″ | 2.834″ | 4″ |
| 3″ | 10-23 | 2.625″ | 3.000″ | |
| 3-1/4″ | 7-14 | 2.875″ | 3.125″ | |
| 3-1/4″ | 13-23 | 3.010″ | 3.250″ | |
| 3-1/2″ | 7-12 | 3.125″ | 3.375″ | |
| 3-1/2″ | 13-23 | 3.260″ | 3.500″ | |
| 3-3/4″ | 5-12 | 3.274″ | 3.567″ | |
| 3-3/4″ | 13-23 | 3.510″ | 3.750″ | |
| 4″ | 5-12 | 3.524″ | 3.817″ | |
| 4″ | 13-23 | 3.782″ | 4.000″ | |
| Stainless Steel Tube Plug Variants | |
|---|---|
| Stainless Steel 304 Tube Plug | SS 304L Tube Plugs |
| Stainless Steel Expandable Tube Plug | Stainless Steel Pin Tube Plug |
| SS 310 Boiler Tapered Tube Plug | 310S Stainless Steel Tube Plugs |
| SS 316 Threaded Tapered Tube Plugs | Stainless Steel One-Piece Tube Plugs |
| SS 316L Collar Tube Plug | Stainless Steel Threaded Tapered Plugs |
| SS 317 Condenser Tube Plug | SS 317L Condenser Tube Plugs |
| Stainless Steel Boiler Tube Plugs | SS Metal Tapered Tube Plug |
| 321 Stainless Steel Tube Plug | SS 321H Tube Plug Supplier |
| Austenitic Stainless Steel Tube Plug | SS 347 Tube Plug Manufacturer |
| 347H SS Tube Plugs | Stainless Steel 904L Tube Plugs |
| Stainless Steel Tube Plug Distributor | SS Tube Plug Exporter |
| 316H SS Tapered Metal Tube Plugs | SS Tapered Tube Plugs |
| SS Pin Tube Plugs | 316Ti SS Heat Exchanger Tube Plug |
| SS Tube Plugs Stockist | Stainless Steel Tube Plug Price |
Stainless steel tube plugs are used to seal or close the ends of tubes and pipes in boilers, heat exchangers, condensers, and industrial piping systems, preventing leakage and ensuring system integrity.
Common grades include SS 304, 304L, 310, 310S, 316, 316L, 317, 317L, 321, 347, 347H, 904L, 316H, and 316Ti, each designed for specific temperature, corrosion, and mechanical requirements.
Some tube plugs, especially threaded or expansion types, can be reused if they are not deformed or damaged. However, single-use plugs should not be reused.