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#6 MP X #12 FP

Description & Features

This straight steel expander features a #6 MP x #12 FP connection. The #6 MP X #12 FP adapter has a male NPTF 3/8-18 thread and a female NPTF 3/4-14 thread, both manufactured to SAE J476 specifications.

This Brennan Industries fitting has a maximum dynamic pressure of 4,000 PSI.

SKU: 5405-06-12

Supplier Part Number (MPN): 5405-06-12

Alternate Part Numbers: A2040-6-12S

Specifications

Brand BRENNAN	Connection Size 1 3/8 in	Connection Size 2 3/4 in	Connection Type FNPT, MNPT	Connection Type 1 Male SAE 30 deg NPTF	Connection Type 2 Female SAE NPTF	Dimension Standards SAE J476	Dimensions 1.74 in L	Finish Trivalent Zinc-Plated	Fitting Type Expander	Hex Size 1-3/8 in	Material Steel	Material Construction 12L14/C1045 Steel	Maximum Operating Pressure 4000 psi	Series 5405 Series	Thread 2 Drill Dimensions 0.719 in	Thread B1 Drill Dimensions 0.406 in	Thread Size 3/4-14 x 3/8-18

Product Questions & Answers (1)

Question by: Phil A on Jan 3, 2026, 10:39 AM

What size are each of the threaded ends on this fitting? I wanna make sure it's the right one before I order it.

Answer by: Customer Support on Jan 5, 2026, 6:33 AM

This straight expander has a male NPTF 3/8-18 thread on one end and a female NPTF 3/4-14 thread on the other. Both threads are manufactured to SAE J476 specifications.

#6 MP X #12 FP

Description & Features

Specifications

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Product Questions & Answers (1)