3/8in Hose x 3/8in NPTF Male Hydraulic Hose End Crimp Fitting - Heavy

In this review the 12Pack 3/8in Hose x 3/8in NPTF Male Pipe Thread Hydraulic Hose End Crimp Fitting is assessed for everyday industrial and hydraulic use; the bottom line is it is a solid, no-nonsense option for technicians who need consistent, serviceable hose ends for petroleum and hydraulic power systems. The reviewer found the build quality and compatibility with common adjustable crimpers to be the single biggest reason to buy, since that makes these fittings easy to integrate into existing hose assembly workflows without specialized tooling.

Key Features

• Heavy duty construction: Carbon steel material gives the fittings the strength needed for industrial hydraulic and petroleum fluid applications.
• Standardized fit: The 3/8in NPTF male thread and 3/8in hose I.D. match common hydraulic hoses for straightforward installation.
• Crimp compatible: These ends work with Weatherhead U-Series and Dayco style adjustable crimpers so shops can use existing crimping equipment.
• Female end dimensions: The female NPTF end accepts an inner diameter of 5/8in (0.63in), clarifying hose-to-fitting compatibility during assembly.
• Repeatable assemblies: Buying a 12 pack makes it easy to produce multiple uniform hose assemblies for maintenance or replacement tasks.

Who It's For

The 12 pack is aimed at professional mechanics, hydraulic technicians, and maintenance teams who assemble or repair hoses for industrial equipment and need reliable, standardized hose ends that crimp cleanly. It is also useful for small shops and hobbyists who have access to a compatible adjustable crimper and routinely work with petroleum-based hydraulic fluids.

Those who should look elsewhere include users needing metric threads, specialized corrosion-resistant alloys, or pre-assembled hose assemblies; this product is a carbon steel crimp fitting sold in bulk, not a finished hose assembly or a plated stainless fitting for highly corrosive environments.

Pros & Cons

Pros

• Good build quality from carbon steel delivers durability for industrial use.
• Compatible with Weatherhead U-Series/Dayco style crimpers, reducing tooling changes.
• Sold in a 12 pack, enabling consistent, repeatable hose assemblies for maintenance.
• Sizes are clearly defined so fitment with 3/8in hoses and 3/8in NPTF threads is predictable.

Cons

• Carbon steel construction is strong but may require additional corrosion protection in wet or salt-prone environments.
• Not suitable for users who need assembled hoses or nonstandard thread types.

Specifications

Product type	3/8in hose x 3/8in NPTF male crimp fitting (12 pack)
Material	Carbon steel
Male NPTF end O.D.	11/16in (0.68in)
Female NPTF end I.D.	5/8in (0.63in)
Female hydraulic hose I.D.	3/8in
Compatibility	Weatherhead U-Series/Dayco and other adjustable crimpers

Our Verdict

The 12Pack 3/8in Hose x 3/8in NPTF Male Pipe Thread crimp fittings are a practical choice for workshops that need reliable, repeatable crimped hose assemblies. With straightforward dimensions and compatibility with common adjustable crimpers, they represent good value for maintenance teams and technicians who assemble hoses in-house, provided users take basic corrosion precautions where needed.

Frequently Asked Questions

Are these fittings compatible with Weatherhead crimpers?
Yes, they are compatible with Weatherhead U-Series and Dayco style adjustable crimpers as stated.

What hose size fits the female end?
The fittings accept a female hydraulic hose inner diameter of 3/8in and the female NPTF end has an I.D. of about 5/8in (0.63in).

Is the material corrosion resistant?
The fittings are carbon steel, which is strong but may need additional corrosion protection for wet or salt-exposed environments.