Best 1/4-20 UNC Screws For Projects And Repairs
When selecting 1/4-20 UNC screws, buyers seek reliable strength, consistent threading, and suitable head types for fast, secure assembly. This guide highlights top picks that cover common uses—from furniture assembly to outdoor projects—featuring stainless steel for corrosion resistance and a range of lengths and head styles. Compare options below and use the buying guide to choose the best match for your needs.
| Product | Brand | Thread Size | Length | Head Type | Notes |
|---|---|---|---|---|---|
| KOSJETHAS 1/4-20 x 3/4″ Allen Hex Socket Head Screw Bolt | KOSJETHAS | 1/4-20 | 3/4″ | Allen Hex Socket Head | 304 stainless; pack of 20 |
| EASTLO 1/4-20 x 3/4″ Button Head Socket Cap | EASTLO | 1/4-20 | 3/4″ | Button Head Socket Cap | 304 stainless; pack of 25 |
| Mriuuod 20Pcs 1/4-20 x 2 Hex Bolts | Mriuuod | 1/4-20 | 2″ | Hex Socket Head | 304 stainless; heavy-duty |
| VIGRUE 1/4-20 Hex Socket Head Cap Screws Assortment Kit | VIGRUE | 1/4-20 | Various (5/8″–2″) | Hex Socket Head Cap | 175 pcs; includes washers and nuts |
| CAMVATE 1/4″-20 Male Thread Double End Screw | CAMVATE | 1/4-20 | Double End (2 pieces) | Male Thread | Aluminum alloy |
Note: All items use standard UNC threading (coarse 20 TPI) and are designed for a range of assembly tasks. Material and finish choices influence corrosion resistance and appearance in finished projects.
KOSJETHAS 1/4-20 x 3/4″ Allen Hex Socket Head Screw Bolt
This KOSJETHAS screw features a 1/4-20 UNC thread with a 3/4-inch length, intended for applications requiring a compact fastener with robust holding power. Made from 304 stainless steel, it resists corrosion in typical indoor and some outdoor environments. The head height is 0.25 inch and head diameter 0.37 inch, with a 0.25 inch head depth, making it suitable for tight spaces where a prominent head would be undesirable.
Package contents include 20 pieces. The fully threaded shank provides full engagement along the threaded region, aiding secure clamping. Suitable for machine tools, electronics enclosures, and light structural assemblies where a clean, stainless solution is preferred.
EASTLO 1/4-20 x 3/4″ Button Head Socket Cap Bolts Screws
These EASTLO bolts use a 5/32 inch Allen hex drive and feature a 1/4-20 UNC thread with full-thread coverage. The bright finish provides a clean aesthetic suitable for visible hardware on furniture or electronics housings. The package includes 25 pieces, making them a practical choice for quick projects or replacements where uniform head appearance matters.
The button head design reduces snag risk on surfaces and can provide a smooth top surface for ergonomic assemblies. The 3/4-inch length offers a balanced option for panels with modest thickness.
EASTLO 1/4-20 x 1″ Button Head Socket Cap Bolts
The longer 1-inch variant from EASTLO provides additional engagement length for thicker assemblies while maintaining a clean button-head profile. The 1/4-20 UNC thread is fully machine threaded with a bright finish for corrosion resistance and a tidy appearance in completed work. This package includes 25 pieces, offering a handy supply for repair projects or ongoing builds requiring consistent fasteners.
Mriuuod 20Pcs 1/4-20 x 2 Hex Bolts
This set from Mriuuod offers 20 pieces of 1/4-20 UNC hex bolts, each 2 inches long and made from 304 stainless steel. The longer length provides stronger material engagement for heavier components and outdoor or workshop use where exposure to moisture is a concern. These bolts are suitable for automotive repairs, furniture assembly, and equipment installations that require reliable thread engagement and corrosion resistance.
VIGRUE 1/4-20 Hex Socket Head Cap Screws Assortment Kit
The VIGRUE assortment kit consolidates 175 pieces of 1/4-20 hex socket head cap screws, along with washers and nuts, in a durable storage box. This kit covers a broad range of lengths from 5/8 inch to 2 inches. A comprehensive option for workshops, it helps builders quickly match the right screw length for varying panel thicknesses and projects, reducing the need to reorder frequently.
CAMVATE 1/4″-20 Male Thread Double End Screws
CAMVATE offers a unique double-ended male-thread screw, designed to fit 1/4″ threaded holes and provide versatile mounting options. Constructed from aluminum alloy, it is lightweight and resistant to corrosion. This product is especially suited for temporary fixtures, alignment tasks, or quick-release assemblies where a reversible or extendable fastener is advantageous.
MewuDecor 1/4-20 x 3/4″ Flat Head Socket Head Screws
This MewuDecor flat-head socket set is designed for furniture attaching and countersunk installations, with 1/4-20 UNC threads and a 3/4-inch length. The screws are 304 stainless steel with a black oxide finish for a discreet, durable appearance. The flat head ensures the screw flushes with the surface, reducing protrusion in finished pieces.
KOSJETHAS 1/4-20 x 1 Allen Hex Socket Head Screw
This KOSJETHAS screw is 1 inch long with a 1/4-20 UNC thread, designed for applications requiring more engagement than the shorter variants. The head height remains at 0.25 inch with a 0.37-inch head diameter. The package includes 20 pieces, and the 304 stainless steel composition contributes to corrosion resistance in typical indoor-to-mild outdoor environments.
Buying Guide: Key Purchase Considerations
- Material and corrosion resistance: Stainless steel (304/18-8) provides corrosion resistance suitable for indoor, outdoor, and moisture-exposed environments. Consider finishes like bright or black oxide based on appearance and additional wear resistance.
- Thread type and engagement: Ensure you want UNC 1/4-20 coarse threads for readily available hardware and compatibility with common nuts and tapped holes. Coarse threads are more forgiving in soft materials and quick assemblies.
- Head style and drive: Choose between hex socket head, button head, or flat head based on space, appearance, and required flushness. Hex drives suit robust, tight spaces; button heads reduce snag risk; flat heads sit flush on panels.
- Length and thread coverage: Select length to achieve proper engagement without protrusion. Fully threaded bolts provide uniform grip; longer lengths enable thicker assemblies but may require clearance checks.
- Packaging and quantity: For ongoing projects, assortments reduce reordering. Solo fasteners are suitable for targeted repairs, but ensure you have a range of lengths if you work with varied materials.
- Compatibility: Verify compatibility with existing nuts, washers, and tapped holes in your project. Some kits include washers and nuts, which helps streamline assembly.
- Applications and environment: For furniture, signage, electronics housings, or outdoor fixtures, match the screw type and finish to the application’s environmental exposure.
- Quality indicators: Look for grade markings, stainless steel composition, and consistent threading. Proper packaging and clear labeling help ensure you get the right size quickly.