Shop Superlok SMC Stainless Tube - Male NPT

Our Series SMC Straight Tube x Male NPT Adapters in 316 stainless steel (316SS) are durable fittings designed to connect straight tubing to male NPT (National Pipe Thread) threaded connections in hydraulic and pneumatic systems. Made from 316SS, these adapters provide superior corrosion resistance, making them perfect for harsh environments such as chemical processing, marine, and food industries. The male NPT side features tapered threads that allow for a secure, leak-proof connection when screwed into NPT-compatible components. The tube side connects to straight tubing, typically made from materials like steel, copper, or aluminum, which is commonly used to transport fluids or gases. The tubing is securely inserted into the adapter, with a compression fitting ensuring a tight, leak-free seal. NPT fittings are favored for their ability to handle high-pressure applications, providing a reliable, durable connection for fluid systems.

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Straight Instrumentation TUBE - FNPT Union

1/16" to 2" Nominal Tube OD

Stainless Steel

Click HERE to view the Superlok Tube Adapters Catalog

Click HERE to view the entire SMC Straight Stainless Steel Fractional TUBE-FNPT Selection

Shop Superlok SMC Stainless Tube - Male NPT

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


Product SKU Brand Material Nominal Tube OD Male NPT Threads Lead Time Price
SMC 1-1N-S316 Superlok 316 Stainless Steel 1/16" (-1) 1/16-27 (-1N) 1-2 Weeks $8.99
SMC 1-2N-S316 Superlok 316 Stainless Steel 1/16" (-1) 1/8-27 (-2N) 1-2 Weeks $9.99
SMC 2-1N-S316 Superlok 316 Stainless Steel 1/8" (-2) 1/16-27 (-1N) 1-2 Weeks $6.99
SMC 2-2N-S316 Superlok 316 Stainless Steel 1/8" (-2) 1/8-27 (-2N) 1-2 Weeks $7.99
SMC 2-4N-S316 Superlok 316 Stainless Steel 1/8" (-2) 1/4-18 (-4N) Same Day $7.99
SMC 2-6N-S316 Superlok 316 Stainless Steel 1/8" (-2) 3/8-18 (-6N) Same Day $10.99
SMC 2-8N-S316 Superlok 316 Stainless Steel 1/8" (-2) 1/2-14 (-8N) Same Day $11.99
SMC 3-2N-S316 Superlok 316 Stainless Steel 3/16" (-3) 1/8-27 (-2N) 1-2 Weeks $7.99
SMC 3-4N-S316 Superlok 316 Stainless Steel 3/16" (-3) 1/4-18 (-4N) 1-2 Weeks $7.99
SMC 4-1N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1/16-27 (-1N) 1-2 Weeks $6.99
SMC 4-2N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1/8-27 (-2N) 1-2 Weeks $6.99
SMC 4-4N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1/4-18 (-4N) Same Day $6.99
SMC 4-6N-S316 Superlok 316 Stainless Steel 1/4" (-4) 3/8-18 (-6N) 1-2 Weeks $7.88
SMC 4-8N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1/2-14 (-8N) Same Day $10.06
SMC 4-12N-S316 Superlok 316 Stainless Steel 1/4" (-4) 3/4-14 (-12N) 1-2 Weeks $15.99
SMC 4-16N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1-11-1/2 (-16N) 1-2 Weeks $25.99
SMC 5-2N-S316 Superlok 316 Stainless Steel 5/16" (-5) 1/8-27 (-2N) 1-2 Weeks $7.99
SMC 5-4N-S316 Superlok 316 Stainless Steel 5/16" (-5) 1/4-18 (-4N) 1-2 Weeks $8.77
SMC 5-6N-S316 Superlok 316 Stainless Steel 5/16" (-5) 3/8-18 (-6N) Same Day $7.99
SMC 5-8N-S316 Superlok 316 Stainless Steel 5/16" (-5) 1/2-14 (-8N) 1-2 Weeks $8.99
SMC 5-12N-S316 Superlok 316 Stainless Steel 5/16" (-5) 3/4-14 (-12N) 1-2 Weeks $19.99
SMC 6-2N-S316 Superlok 316 Stainless Steel 3/8" (-6) 1/8-27 (-2N) 1-2 Weeks $7.99
SMC 6-4N-S316 Superlok 316 Stainless Steel 3/8" (-6) 1/4-18 (-4N) Same Day $7.99
SMC 6-6N-S316 Superlok 316 Stainless Steel 3/8" (-6) 3/8-18 (-6N) Same Day $8.99
SMC 6-8N-S316 Superlok 316 Stainless Steel 3/8" (-6) 1/2-14 (-8N) Same Day $10.99
SMC 6-12N-S316 Superlok 316 Stainless Steel 3/8" (-6) 3/4-14 (-12N) 1-2 Weeks $13.99
SMC 6-16N-S316 Superlok 316 Stainless Steel 3/8" (-6) 1-11-1/2 (-16N) 1-2 Weeks $29.99
SMC 8-2N-S316 Superlok 316 Stainless Steel 1/2" (-8) 1/8-27 (-2N) 1-2 Weeks $14.99
SMC 8-4N-S316 Superlok 316 Stainless Steel 1/2" (-8) 1/4-18 (-4N) Same Day $11.99
SMC 8-6N-S316 Superlok 316 Stainless Steel 1/2" (-8) 3/8-18 (-6N) Same Day $11.99
SMC 8-8N-S316 Superlok 316 Stainless Steel 1/2" (-8) 1/2-14 (-8N) Same Day $13.09
SMC 8-12N-S316 Superlok 316 Stainless Steel 1/2" (-8) 3/4-14 (-12N) 1-2 Weeks $18.31
SMC 8-16N-S316 Superlok 316 Stainless Steel 1/2" (-8) 1-11-1/2 (-16N) 1-2 Weeks $32.99
SMC 10-6N-S316 Superlok 316 Stainless Steel 5/8" (-10) 3/8-18 (-6N) 1-2 Weeks $13.43
SMC 10-8N-S316 Superlok 316 Stainless Steel 5/8" (-10) 1/2-14 (-8N) 1-2 Weeks $14.99
SMC 10-12N-S316 Superlok 316 Stainless Steel 5/8" (-10) 3/4-14 (-12N) 1-2 Weeks $18.23
SMC 10-16N-S316 Superlok 316 Stainless Steel 5/8" (-10) 1-11-1/2 (-16N) 1-2 Weeks $33.99
SMC 12-4N-S316 Superlok 316 Stainless Steel 3/4" (-12) 1/4-18 (-4N) 1-2 Weeks $19.99
SMC 12-8N-S316 Superlok 316 Stainless Steel 3/4" (-12) 1/2-14 (-8N) Same Day $19.99
SMC 12-12N-S316 Superlok 316 Stainless Steel 3/4" (-12) 3/4-14 (-12N) 1-2 Weeks $18.99
SMC 12-16N-S316 Superlok 316 Stainless Steel 3/4" (-12) 1-11-1/2 (-16N) 1-2 Weeks $30.99
SMC 14-8N-S316 Superlok 316 Stainless Steel 7/8" (-14) 1/2-14 (-8N) 1-2 Weeks $34.99
SMC 14-12N-S316 Superlok 316 Stainless Steel 7/8" (-14) 3/4-14 (-12N) 1-2 Weeks $34.99
SMC 14-16N-S316 Superlok 316 Stainless Steel 7/8" (-14) 1-11-1/2 (-16N) 1-2 Weeks $36.99
SMC 16-6N-S316 Superlok 316 Stainless Steel 1" (-16) 3/8-18 (-6N) 1-2 Weeks $34.99
SMC 16-8N-S316 Superlok 316 Stainless Steel 1" (-16) 1/2-14 (-8N) 1-2 Weeks $35.99
SMC 16-12N-S316 Superlok 316 Stainless Steel 1" (-16) 3/4-14 (-12N) 1-2 Weeks $36.99
SMC 16-16N-S316 Superlok 316 Stainless Steel 1" (-16) 1-11-1/2 (-16N) 1-2 Weeks $35.08
SMC 20-20N-S316 Superlok 316 Stainless Steel 1-1/4" (-20) 1-1/4-11-1/2 (-20N) 1-2 Weeks $62.99
SMC 24-20N-S316 Superlok 316 Stainless Steel 1-1/2" (-24) 1-1/4-11-1/2 (-20N) 1-2 Weeks $128.99
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See the chart below for additional Dimensional Detail & Pressure Ratings




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