MGI SpeedWare 1 in NPT Strain Relief Cable Glands 20-Pack - Durable

In this review the MGI SpeedWare 1 in NPT strain relief cable glands are evaluated as a pragmatic solution for installers who need reliable cable protection and a neat finish. The review finds these black nylon cable glands most useful where a secure, waterproof pass-through is required, offering an IP68-rated seal and straightforward installation that saves time on industrial, marine, and HVAC jobs. For anyone fitting 18-25mm cables, the single biggest reason to buy is the combination of durable material and strong cable hold that reduces mechanical stress at connection points.

Key Features

• Wire protection: Provides strain relief for cables and wires passing through panels or connecting to equipment, reducing wear at entry points.
• Outer drill diameter: Designed for a 1.3 in panel hole so installers can plan cutouts precisely and avoid guesswork.
• Easy installation: Cable simply passes through the gland and the cap is tightened, making fitting quick for both pros and DIYers.
• Versatile fit: Accepts cables from 0.71 in to 0.98 in (18 - 25mm), covering common cord sizes including multi-conductor runs.
• Waterproof rating: IP68 rating allows temporary or permanent underwater use and resists salt water, weak acids, oils and solvents.

Who It's For

The glands are aimed at electricians, HVAC technicians, marine fitters, and equipment builders who need a compact, professional-looking finish and genuine strain relief for medium-diameter cables. They work well for mini split AC installations, control cable entries on enclosures, and wiring runs where a sealed pass-through is required.

These are not intended for ultra-large conduit or very small micro cables outside the 18-25mm range; users with cables smaller than 0.71 in or larger than 0.98 in should look for other sizes. Also, if a metallic gland or flame-retardant material is mandatory for a specific code, choose an alternate product.

Pros & Cons

Pros

• Durable black nylon body gives a professional look while resisting oil, grease and common solvents.
• IP68 waterproof rating provides confidence for wet or marine environments.
• Holds cable firmly and provides reliable strain relief, making it suitable for 3-wire 16AWG and similar cables.
• Simple screw-on cap speeds installation and reduces labor time.

Cons

• Limited to cables between 0.71 in and 0.98 in, so it is not universal for every cord size.
• Plastic construction may not meet applications that require metal glands or specific fire ratings.

Specifications

Brand	MGI SpeedWare
Thread type	1 in NPT
Outer drill diameter	1.3 in
Cable range	0.71 in to 0.98 in (18 - 25mm)
Material	Black nylon (plastic)
Ingress protection	IP68
Pack quantity	20 pieces

Our Verdict

The MGI SpeedWare 1 in NPT cable glands are a solid, cost-effective choice for professionals needing a waterproof, easy-to-fit solution for medium-diameter cables. They deliver dependable strain relief, a tidy finish, and chemical resistance at a good value, making them worthwhile for most industrial, marine, and HVAC wiring tasks when a plastic gland fits the application.

Frequently Asked Questions

Will these fit 16AWG three-conductor cable?
Yes; customers report good functionality with 3-wire 16AWG where the overall jacket diameter falls within 0.71 in to 0.98 in.

Are these suitable for underwater use?
Yes; the glands are IP68 rated and are designed to resist temporary or permanent submersion and exposure to salt water and common solvents.

How hard is installation?
Very straightforward: drill a 1.3 in hole, pass the cable through, and tighten the cap to secure the seal and provide strain relief.