Shop Superlok SP Stainless Tube Plugs

Our Series SP Stainless Tube Plugs, crafted from high-quality 316SS, are designed to securely seal and close off the ends of tubes in hydraulic and instrumentation systems. These durable plugs fit inside tube fittings, providing a tight seal to prevent leaks, contamination, and damage to the system. Ideal for a wide range of applications, Series SP Tube Plugs help maintain system integrity by protecting critical components and ensuring smooth, uninterrupted operation in industrial environments.

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Instrumentation Tube Plugs

1/16" to 1" Nominal Tube OD

Stainless Steel

Click HERE to view the Superlok Tube Adapters Catalog

Click HERE to view the entire SP Fractional Stainless Steel CAP Selection

Click HERE to view the entire SP-M Metric Stainless Steel CAP Selection

Shop Superlok SP Stainless Tube Plugs

Click on the model number in the chart below to view that adapter. 


Fractional Tube Caps

Product SKU ▼ Brand ▼ Material ▼ Nominal Tube ODs ▼ Lead Time ▼ Price ▼
SP-2-S316 Superlok 316 Stainless Steel 1/8" (-2) 1-2 Weeks $5.99
SP-4-S316 Superlok 316 Stainless Steel 1/4" (-4) Same Day $4.99
SP-6-S316 Superlok 316 Stainless Steel 3/8" (-6) Same Day $5.28
SP-8-S316 Superlok 316 Stainless Steel 1/2" (-8) Same Day $7.99
SP-10-S316 Superlok 316 Stainless Steel 5/8" (-10) 1-2 Weeks $10.99
SP-12-S316 Superlok 316 Stainless Steel 3/4" (-12) 1-2 Weeks $11.99
SP-16-S316 Superlok 316 Stainless Steel 1" (-16) 1-2 Weeks $23.99
SP-24-S316 Superlok 316 Stainless Steel 1-1/2" (-24) 1-2 Weeks $68.99
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Metric Tube Caps

Product SKU ▼ Brand ▼ Material ▼ Nominal Tube ODs ▼ Lead Time ▼ Price ▼
SP-6M-S316 Superlok 316 Stainless Steel 6mm (-6M) 1-2 Weeks $4.99
SP-8M-S316 Superlok 316 Stainless Steel 8mm (-8M) 1-2 Weeks $4.99
SP-10M-S316 Superlok 316 Stainless Steel 10mm (-10M) 1-2 Weeks $4.99
SP-12M-S316 Superlok 316 Stainless Steel 12mm (-12M) 1-2 Weeks $7.99
SP-18M-S316 Superlok 316 Stainless Steel 18mm (-18M) 1-2 Weeks $11.99
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See the chart below for additional Dimensional Detail & Pressure Ratings




Still need help? Give us a call at 281.941.2310 or email us at sales@onehydraulics.com for technical support.