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06 BULKHD LOCK NUT

Description & Features

The 06 BULKHD LOCK NUT is a precision-engineered component manufactured by Brennan Industries Inc. This locking nut features a male JIC SAE 37-degree flare thread type complying with SAE J514 specifications. It is crafted from straight steel ensuring both durability and reliable performance in industrial settings.

Featuring a C hex of 0.812 mm and an overall length of 0.270 mm this bulkhead lock nut is designed for secure and stable connections. The thread B1 size is suited for tube OD 3/8 applications providing versatility in various mechanical and engineering setups.

California residents should note the PROP-65 warning.

MPN: 0306-06

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 0306-06	Product Weight 0.01 lbs

Product Questions & Answers (2)

Question by: Neal H on Apr 7, 2025, 9:53 PM

thread size on this one is 9/16-18, that right? trying to match it up to a 3/8 tube line we already got running

Answer by: Customer Support on Apr 9, 2025, 1:30 PM

9/16-18 is the correct thread drill size for this lock nut, and it's sized for 3/8 inch tube OD. If you've got a 3/8 tube line, this is the one you want for the bulkhead connection. It runs a male JIC SAE 37-degree flare thread per SAE J514, so just make sure whatever you're mating it to is spec'd the same way.

Question by: Terry M on Nov 25, 2025, 8:15 AM

trying to match up parts here, is this lock nut for a 3/8 tube size with a 9/16-18 JIC thread?

Answer by: Customer Support on Nov 27, 2025, 6:31 AM

The key callouts are Thread B1 drill size 9/16-18 and a male JIC SAE 37 degree flare thread per SAE J514, with Thread B1 listed for tube OD 3/8.