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12BULKHEAD LOCK NUT

Description & Features

This bulkhead lock nut is part of the FS0306 series from Brennan Industries. The 12BULKHEAD LOCK NUT features a 1-3/16-12 Brennan A thread and fits a 3/4 inch tube OD. It has a 1.500-inch Brennan B hex and a 0.410-inch Brennan Tt width.

SKU: FS0306-12

Supplier Part Number (MPN): FS0306-12

Alternate Part Numbers: AFF9768-12S

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number FS0306-12	Product Weight 0.99 lbs

Product Questions & Answers (2)

Question by: Carl G on Jul 23, 2025, 6:56 AM

what tube size does this lock nut work with, the 3/4 inch OD?

Answer by: Customer Support on Jul 24, 2025, 9:13 PM

3/4 inch tube OD is exactly what this one's sized for. It carries a 1-3/16-12 thread on the Brennan A side and a 1.500-inch hex, so make sure your fittings and wrench size line up with those specs before you order.

Question by: Clint M on Oct 14, 2025, 3:29 PM

Just want to make sure, this lock nut fits a 3/4 inch OD tube, right?

Answer by: Customer Support on Oct 16, 2025, 6:38 AM

That is correct. This bulkhead lock nut is designed for use with a 3/4 inch outer diameter tube.