- Stock 487
:
from
to
Clear
Clear
Round Head Machine Screw · 1/4-20 x 3/4 in - Zinc-Plated Steel - Fasteners 1/4-20X3/4RS
SKU: S-1/4-20X3/4RS
Zinc-plated steel round head machine screw with 1/4-20 coarse thread and 3/4 in length for fastening electrical hardware, panels, covers, and brackets. Commonly used where a machine-thread fastener is required with a nut or tapped hole; confirm head style, drive type, and material requirements before ordering.
What this product is for
This 1/4-20 x 3/4 in round head machine screw is used to fasten electrical components, covers, brackets, and hardware where a machine-thread fastener is required. The zinc-plated steel construction is commonly selected for general indoor electrical and mechanical fastening.
Use for
- Panel hardware and enclosure accessories
- Junction box covers, brackets, and mounting plates
- Electrical equipment assembly using a nut or tapped hole
- General replacement stock for maintenance bins and service vehicles
Avoid for
- Highly corrosive, washdown, or outdoor environments where stainless steel may be preferred
- Applications requiring a confirmed drive style, head diameter, or specific certification not verified from source data
- Thread-forming or self-tapping applications in untapped material
Best for
Best for electricians, panel builders, and maintenance teams who need a common coarse-thread machine screw size for indoor equipment fastening. A 1/4-20 thread is a standard imperial machine thread often used with matching nuts, lock washers, and tapped metal components.
Installed in
Typically installed in control panels, electrical cabinets, junction boxes, equipment frames, support brackets, and general-purpose metal assemblies in commercial and industrial settings.
Why this product exists
This screw provides a reusable machine-thread fastening method for parts that need secure assembly and future service access. Zinc plating is typically used to provide basic corrosion resistance for dry indoor locations.
Compared with similar products
Compared with self-tapping screws, a machine screw is intended for use with a nut or pre-threaded hole. Compared with stainless steel machine screws, zinc-plated steel is typically more economical for indoor work but offers lower corrosion resistance. Round head styles are commonly chosen where a domed head profile is acceptable above the surface.
Specifications
- Product type: Machine screw
- Head style: Round head
- Thread size: 1/4-20 UNC
- Length: 3/4 in (approximately 19 mm)
- Thread series: Coarse
- Material: Steel
- Finish: Zinc-plated
- Typical application: Fastening into a nut or tapped hole
- Trade note: 1/4-20 is a common coarse machine thread for general equipment fastening
- Buying note: Actual fit depends on head style, drive type, mating thread condition, and installation requirements
- Length3/4 in (approximately 19 mm)
- ApplicationFastening into a nut or tapped hole
- MaterialSteel
- Head StyleRound head
- FinishZinc-plated
- Thread Size1/4-20 UNC
- Trade Note1/4-20 is a common coarse machine thread for general equipment fastening
- Buying NoteActual fit depends on head style, drive type, mating thread condition, and
- BrandsWhite Label
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.
Contact Aptico SupplyWe accept the following payment methods:
To replace this text with your store's actual info on payment methods, go to "Design -> Menus & Pages -> Product Page Tabs" and edit the Payment methods page.
This page is intended for your policy regarding returns and refunds.
Here you can provide information as to what products can be returned, how many days your customers have to return their purchase, whether they will receive a refund in the original form of payment, a replacement or a store credit, who pays for the shipping of the previously purchased products to the store, and so on.
To replace this text with your store's actual return policy, go to "Design -> Menus & Pages -> Product Page Tabs" and edit the Return Policy page.