- Stock 38
Flanged Polyamide Locknut · PG21 · Light Grey · ITC Electrical 184.021
Flanged polyamide locknut for PG21 cable glands and electrical fittings. Light grey PA6 with glass fibre reinforcement helps secure fittings to panels and enclosures; the flanged face provides a larger bearing surface for improved fit on cutouts.
What this product is for
This flanged polyamide locknut is used to secure PG21 threaded cable glands and similar electrical fittings to panels, boxes, and enclosures in commercial and industrial installations.
Use for
Use for PG21 threaded entries where you need a non-metallic locknut with a wider flanged bearing surface. Commonly used with cable glands on control panels, junction boxes, and equipment enclosures.
Avoid for
Avoid using this locknut where a different thread standard is required, such as metric, NPT, or BSP fittings. Avoid applications that require a metal locknut for bonding or specific mechanical requirements.
Best for
Best for electricians and panel builders who need a light grey PG21 locknut matched to compatible ITC cable gland accessories. The flanged design is typically chosen when a larger contact area is preferred over a standard non-flanged locknut.
Installed in
Typically installed in sheet metal panels, non-metallic enclosures, control cabinets, and equipment housings with PG21 threaded cable gland entries.
Why this product exists
This locknut secures the threaded body of a cable gland or fitting from the inside of the enclosure. Compared with a non-flanged locknut, the flange helps spread clamping force over a wider area and can help accommodate minor cutout irregularities. Sealing performance may be improved when used with a sealing washer, depending on the fitting and enclosure design.
Compared with similar products
Choose this model when you need a PG21 flanged plastic locknut in light grey. ITC also offers other sizes and thread types in the same family, including metric, NPT, and BSP versions, plus non-flanged locknuts where space is limited.
Specifications
- Product type: Flanged locknut
- Thread size: PG21
- Colour: Light grey
- Material: Polyamide 6 with 30% glass fibre
- Application: Securing cable glands and electrical fittings to panels and enclosures
- Category family: Plastic locknuts
- Typical installation: Inside enclosure on compatible PG21 threaded fitting
- Note: Verify thread standard and fitting compatibility before ordering.
- ApplicationSecuring cable glands and electrical fittings to panels and enclosures
- ColourLight grey
- MaterialPolyamide 6 with 30% glass fibre
- Typical InstallationInside enclosure on compatible PG21 threaded fitting
- Thread SizePG21
- NotesVerify thread standard and fitting compatibility before ordering.
- BrandsITC Electrical Components
- Stock in Elmira53
Aptico Supply Delivery
Fast Electrical Supply Delivery Across Ontario
Local delivery routes, pickup options, and contractor-focused service from our Elmira and Flesherton locations.

Delivery Built Around Electrical Contractors
Aptico Supply helps electricians, contractors, and commercial buyers get the electrical materials they need without unnecessary delays. Whether you are ordering for a jobsite, restocking service inventory, or arranging pickup, our delivery options are designed to keep work moving.
Free Daily Delivery
Free daily delivery is available for larger contractor accounts.
- Order by 9:00 AM for morning delivery
- Order by 2:00 PM for afternoon delivery
- Available in qualifying local delivery areas
Free Weekly Delivery
Free weekly delivery is available for smaller accounts in select service areas.
- Elmira area delivery: Tuesday
- Flesherton area delivery: Thursday
- Order by 11:00 AM on the route day
Pickup Options
Pickup is available from our Ontario locations for customers who prefer to collect their order directly.
- Elmira pickup available
- Flesherton pickup available
- Call ahead for large or special-order items
Local Delivery Areas
See our local delivery coverage below. Delivery charges may apply outside regular route areas or for oversized items.
Delivery Questions
Do you offer free delivery?
Yes, free delivery is available for qualifying contractor accounts and selected local delivery routes.
Can I pick up my order?
Yes, pickup is available from our Elmira and Flesherton locations.
Do delivery charges apply?
Delivery charges may apply outside regular local routes, for smaller orders, or for oversized and heavy items.
Can you deliver to jobsites?
Yes, jobsite delivery may be available depending on the order size, location, and delivery schedule.
Need Electrical Supplies Delivered?
Contact Aptico Supply to confirm your delivery options, pickup availability, or contractor account eligibility.
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