1.375-24 Bravo (HUB) Direct Thread Mounts




1.375-24 Bravo pattern direct thread mounts, 17-4 H900 stainless steel. Except for the lightening holes drilled from the front, these are machined in a single set up from solid bar stock to ensure all critical features are concentric and aligned. These are properly counterbored for installation on AR barrels and others that lack a rear undercut.

Flange diameter: 1.5″
Flange thickness: .2″
Overall height: .65″
Weight: 2.4-2.8 oz

These mounts install/remove with 1.5″ or adjustable spanner wrenches.  We recommend the OTC 4791 adjustable spanner wrench, which will work with many mounts & adapters of varying diameters as well as some suppressor bodies.

Unless otherwise specified, 1.375-24 Bravo direct thread mounts are THROUGH THREADED; they DO NOT have an internal shoulder to register on muzzles.   If you need an internal shoulder in a direct thread mount, please contact us about custom parts.   M14x1 LH Bravo mount has a rebated register face so that the flange does not contact the front sight tower.

In stock Natural finish or Black adapters ship 1-2 business days. Other color options add up to 10 business days.


Not sure what Bravo pattern means? Learn more about it here (Scroll to bottom): https://www.eccomachine.net/our-faqs/

Additional information

Muzzle Threads

1/2-28 Sig Taper, 5/8-24 Sig Taper, 7/16-28, 1/2-20, 1/2-24 (Ruger), 1/2-28, 1/2-36, 9/16-24, 9/16-24 LH, 9/16-28, .578-28, 5/8-18 (Ruger), 5/8-20, 5/8-24, 5/8-32, 11/16-24, 3/4-24, 3/4-28, 13/16-16, 7/8-20, 7/8-24, M13x.75 Browning, M13x1RH, M13.5x1LH, M13x1.25, M13x1.25 (Browning), M14x1RH, M14x1LH, M15x1RH, M16x1RH, M16x1LH, M18x1RH, M18x1.5 Taper

14 responses to “1.375-24 Bravo (HUB) Direct Thread Mounts”

    October 2, 2023
    I've recently purchased a ruger m77 African in 375 ruger and a hybrid 46 suppressor to go along with it. While waiting I started searching for a thread adapter for 5/8-18 x 13.75-24. There were no factory options, which led me to Ecco. I ordered the adapter and it was shipped immediately, I received it a few days later. The adapter is marked with the threads so I always know the threads, which is ideal. The black finished is great and all but spinning it onto a rifle is so satisfying! This is a testimony for the high quality cut of the thread. One quick flick of the finger firmly shoulders the adapter.
    August 24, 2023
    Ordered a bravo mount to 7/8 -24 for a special video I am about to do and fits perfectly and showed up real quick
    August 14, 2023
    The ECCO Machine 1.375-24 HUB mount is excellent quality, fit and finish. It fits my YHM suppressor perfectly and adapts to my KAK .578-28 barrel perfectly. Their response time and shipping are fantastic.
    August 11, 2023
    Well made adapter, flawlessly finished. and one of the few I could find to adapt a Ruger American Range Rifle in .450 Bushmaster 11/16-24 to a HUB adapter.
    Mark @ D&M Gun Sales
    May 19, 2023
    This was just what I needed for a customer's setup. It is very well made and half the price of the only other option I could find for this particular combo, a Q The Fix 8.6 without the Cherrybomb and equipped with an AB Suppressor Raptor 8 .338. Highly recommended!
    May 18, 2023
    Amazing quality, fit, and finish. Matches up perfectly with my dead air primal to mount to my trapper. Works perfectly with the factory wrench, and is 2/3 the price of anyone else. Bravo Zulu again Ecco.
    May 15, 2023
    High quality work and fast shipping.
    April 5, 2023
    This product is machined perfectly. The threading and fit and finish are beautifully done. Top notch machine shop.
    Jeffrey Reep
    March 26, 2023
    Purchased this adapter for a hybrid 46 suppressor. Shipping was fast; packaging was top notch. Fit and finish were perfect, no burrs. Top quality at a great price.
    March 26, 2023
    Got this to use with a Silencer Co Hybrid 45, perfect fitment. Machining is top notch. Threads are cut perfect and no burrs anywhere on the adapter.
    March 6, 2023
    Excellent quality product. Fit and finish are perfect.
    February 20, 2023
    Fast shipping and great customer service, amazing fit and finish
    January 12, 2023
    Fit and finish were great. I have a background in CNC so I’m familiar with good quality parts
    James D
    October 30, 2022
    This mount completes my F1. Superb machining, fast shipping and great customer service as always.

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1.375-24 Bravo (HUB) Direct Thread Mounts
1.375-24 Bravo (HUB) Direct Thread Mounts
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