Hex Machine Nut · 4-40 thread 1/4 in x 3/32 in thick zinc-plated steel · Fasteners 4-40HMNZ
Zinc-plated steel hex machine nut for #4-40 UNC machine screws, sized 1/4 in across flats x 3/32 in thick (approximately 6.4 mm x 2.4 mm). Commonly used in panels, devices, and light assembly work where a small machine-thread nut is required.
What this product is for
This hex machine nut is used with #4-40 UNC machine screws to secure small electrical and mechanical components in panels, enclosures, devices, and control assemblies. The zinc-plated steel finish helps provide basic corrosion resistance for indoor dry-location use.
Use for
Use for fastening terminal hardware, nameplates, light-gauge brackets, control components, and enclosure accessories where a #4-40 machine thread is specified. The 1/4 in across-flats size fits standard small hand tools, and the 3/32 in thickness is typical for regular-pattern machine screw nuts.
Avoid for
Avoid using this nut where stainless steel, locking hardware, vibration resistance, or outdoor corrosion resistance is required. Do not use it as a substitute for a different thread size or thread pitch.
Best for
Best for electricians, panel builders, maintenance teams, and OEM assembly work needing a standard #4-40 zinc-plated machine nut for small-component fastening.
Installed in
Typically installed in control panels, junction boxes, device backplates, instrumentation assemblies, and light-duty equipment housings in commercial and industrial settings.
Why this product exists
It provides a standard mating nut for #4-40 machine screws where compact size, simple installation, and common replacement availability matter. For trade buying, this is a common small-hardware size used when a full-size hex nut is needed instead of a specialty fastener.
Compared with similar products
Compared with stainless steel machine nuts, zinc-plated steel is typically more economical for indoor applications. Compared with locknuts or prevailing-torque nuts, this standard hex machine nut is better suited to straightforward assembly where a separate lock washer or thread-locking method can be added if needed.
Specifications
- Product type: Hex machine nut
- Thread size: #4-40 UNC
- Across flats: 1/4 in (approximately 6.4 mm)
- Thickness: 3/32 in (approximately 2.4 mm)
- Material: Steel
- Finish: Zinc-plated
- Pattern: Regular / standard machine screw nut
- Typical use: Small electrical and mechanical assemblies
- ApplicationSmall electrical and mechanical assemblies
- MaterialSteel
- FinishZinc-plated
- Thread Size#4-40 UNC
- Across Flats1/4 in (approximately 6.4 mm)
- PatternRegular / standard machine screw nut
- Thickness3/32 in (approximately 2.4 mm)
- BrandsWhite Label
- Stock in Elmira437
Aptico Supply Delivery
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Local delivery routes, pickup options, and contractor-focused service from our Elmira and Flesherton locations.
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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
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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
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Pickup is available from our Ontario locations for customers who prefer to collect their order directly.
- Elmira pickup available
- Flesherton pickup available
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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.
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