The market for machine screws and bolts includes many 1/4-20 and 3/8-16/20 options. This guide highlights five solid 1/4-20 x 3/8″ bolts that closely align with typical 3/8-20 use cases, offering durable stainless steel, reliable threading, and convenient packaging. Each pick includes practical features such as full threading, hex drive compatibility, and corrosion resistance to support furniture, appliances, and workshop repairs.
| Product | Material | Package | Key Benefit |
|---|---|---|---|
| 1/4-20 x 3/8″ Flat Head Hex Socket Screws — BNUOK | 304 Stainless Steel | 20 Pcs | Good torque transmission and clean finish |
| 1/4-20 x 3/8″ Flat Head Hex Socket Screws — MoyoCodi (50 Pack) | 304 Stainless Steel | 50 Pcs | Value pack with hex key |
| 1/4-20 x 3/8″ Flat Head Hex Socket Screws — BNUOK (Second Variant) | 304 Stainless Steel | 20 Pcs | Full thread with smooth operation |
| 1/4-20 x 3/8″ Button Head Socket Cap Bolts — MewuDecor | 18-8 Stainless Steel | 25 Pcs | Low profile button head, corrosion resistant |
| 1/4-20 x 3/8″ Hex Head Bolt — SG TZH | 18-8 Stainless Steel | 20 Pcs | Rugged, durable, wide applications |
BNUOK 1/4-20 x 3/8″ Flat Head Hex Socket Screws
These 20 pieces feature a flat head with a hex socket, designed for stable torque and reduced head wear. Made from 304 stainless steel with a black zinc finish, they resist corrosion in typical workshop environments. The full-thread design spreads load along the bolt and nuts, providing a neat, professional finish for furniture assembly or appliance repairs. The included hex spanner makes installation straightforward in tight quarters.
MoyoCodi 1/4-20 x 3/8″ Flat Head Hex Socket Screws (50 Pack)
The MoyoCodi set includes 50 flat head hex screws with a bright finish and full machine threading. Constructed from 304 stainless steel (black oxide finish), these screws offer strong corrosion resistance for use in damp or outdoor environments. They come with a hex key for quick setup and are suitable for home, office, or workshop projects, including metal sheets and light machinery assembly. Thread diameter is 1/4 inch with a 3/8 inch pitch, aligning with common 1/4-20 hardware standards.
BNUOK 1/4-20 Bolt (Second Variant) 20Pcs
This set repeats the 1/4-20 x 3/8″ flat head design with a full thread and hex spanner included for ease of use. The package is ideal for completing multiple small repairs around the home or shop, where consistent torque and clean thread engagement matter. The screws are finished to minimize cross threading risk while presenting a neat, professional look in final assemblies.
MewuDecor 1/4-20 x 3/8″ Button Head Socket Cap Bolts
MewuDecor offers 25 pieces of stainless steel 18-8 button head screws with a full thread and an Allen hex drive. The button head design presents a low profile that minimizes snagging and offers a larger contact surface for load distribution. Ideal for sheet metal work and wet environments, these bolts resist corrosion and maintain color and smooth turning in challenging settings.
SG TZH 1/4-20 x 3/8″ Hex Head Bolt
The SG TZH bolts are 18-8 stainless steel with a black oxide finish, providing enhanced corrosion resistance and durability. With a 1/4-inch diameter and 3/8-inch length, these fully threaded bolts are suited for home improvements, appliance repair, and light machinery assembly. Their rugged construction ensures longevity even in demanding environments, making them a dependable choice for general hardware projects.
Buying Guide
- Size compatibility: Confirm the thread diameter (1/4-20 is common) and length (3/8″) to ensure proper engagement with nuts and tapped holes.
- Material and finish: Stainless steel (18-8 or 304) resists corrosion; black oxide provides a cleaner aesthetic but may be less resistant to wear than stainless finishes.
- Head style: Flat head is flush with surfaces; button head offers a low-profile look with broader contact; hex head bolts provide robust torque transmission in tight spaces.
- Threading: Fully threaded bolts distribute load along the length; partial-thread versions are better for clamping where precise shear is required.
- Packaging: Value packs save cost for larger projects; include a hex key if required for on-site adjustments.
- Applications: Suitable for furniture, appliances, sheet metal, and light mechanical assemblies; avoid using stainless hardware in high-heat environments unless specified.
- Installation considerations: Use proper torque to avoid stripping threads; ensure compatible nuts and washers are used to reduce embedding and provide even load distribution.
These five options provide solid alternatives when you need reliable 1/4-20 x 3/8″ bolts with good corrosion resistance and straightforward installation. By comparing head styles, materials, and packaging, you can select bolts that best fit your project size, environment, and budget.