Shop Superlok SMCB Stainless Bulkhead Tube - Male NPT

Series SMCB Straight Bulkhead Tube x Male NPT Adapters in 316 stainless steel (316SS) are high-performance fittings designed to connect straight tubing to male NPT (National Pipe Thread) threaded connections while passing through a bulkhead or wall. Made from corrosion-resistant 316SS, these adapters are ideal for use in harsh environments like chemical processing, marine, and food industries. The bulkhead design allows the adapter to securely pass through a wall or panel while maintaining a strong, leak-proof connection. The male NPT side features tapered threads that ensure a tight seal when connected to NPT-compatible components. The tube side connects to straight tubing, typically made from materials such as steel, copper, or aluminum, which are used to carry fluids or gases. The tubing is fastened into the adapter with a compression fitting to provide a durable, leak-free connection. NPT fittings are known for their ability to handle high-pressure systems, ensuring reliable and secure connections in fluid systems.

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Straight Instrumentation TUBE - MNPT Bulkhead

1/8" to 1" Nominal Tube OD

Stainless Steel

Click HERE to view the Superlok Tube Adapters Catalog

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

Shop Superlok SMCB Stainless Bulkhead 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
SMCB 2-2N-S316 Superlok 316 Stainless Steel 1/8" (-2) 1/8-27 (-2N) 1-2 Weeks $18.99
SMCB 4-2N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1/8-27 (-2N) 1-2 Weeks $12.99
SMCB 4-4N-S316 Superlok 316 Stainless Steel 1/4" (-4) 1/4-18 (-4N) Same Day $12.99
SMCB 4-6N-S316 Superlok 316 Stainless Steel 1/4" (-4) 3/8-18 (-6N) 1-2 Weeks $15.99
SMCB 5-4N-S316 Superlok 316 Stainless Steel 5/16" (-5) 1/4-18 (-4N) 1-2 Weeks $12.87
SMCB 6-4N-S316 Superlok 316 Stainless Steel 3/8" (-6) 1/4-18 (-4N) 1-2 Weeks $15.99
SMCB 6-6N-S316 Superlok 316 Stainless Steel 3/8" (-6) 3/8-18 (-6N) 1-2 Weeks $20.99
SMCB 6-8N-S316 Superlok 316 Stainless Steel 3/8" (-6) 1/2-14 (-8N) 1-2 Weeks $20.99
SMCB 8-6N-S316 Superlok 316 Stainless Steel 1/2" (-8) 3/8-18 (-6N) 1-2 Weeks $23.99
SMCB 8-8N-S316 Superlok 316 Stainless Steel 1/2" (-8) 1/2-14 (-8N) 1-2 Weeks $23.99
SMCB 12-12N-S316 Superlok 316 Stainless Steel 3/4" (-12) 3/4-14 (-12N) 1-2 Weeks $42.99
SMCB 16-16N-S316 Superlok 316 Stainless Steel 1" (-16) 1-11-1/2 (-16N) 1-2 Weeks $72.89
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See the chart below for additional Dimensional Detail & Pressure Ratings




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