4-40 unc Torx screws - High-Quality Supplier for Precision Fasteners

I supply {4-40 unc Torx screws} with a focus on reliability and precise tolerances for critical assemblies. As a {Supplier}, I insist on {High-Quality} materials and tight control, so you get consistent grades, clean threads, and dependable performance. We offer both stainless steel and zinc-plated carbon steel options, all sized for standard 4-40 UNC threads and Torx drive to minimize cam-out on dense materials. This makes them ideal for electronics, automotive, or aerospace sub-assemblies where traceability matters. I can support R&D through high-volume production with fast lead times and reliable stock. Each batch is inspected for diameter, length, head type, and torque values, with documentation available on request. Bulk packaging and custom labeling help you streamline manufacturing and QA. If you’re looking for a scalable, quality-first fastener supply, I’m your go-to {Supplier} for {4-40 unc Torx screws}.

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4-40 unc Torx screws For the Current Year Your Trusted OEM Partner

Selecting the right 4-40 UNC Torx screws is essential for reliable small-assembly work across electronics, enclosures, and precision equipment. The Torx drive offers better torque transfer and less cam-out than Phillips or slotted heads, while the 4-40 thread is compact for keyboards, enclosures, and PCBs. Materials range from carbon steel with zinc or black-oxide finishes to stainless steel for corrosion resistance, plus various plating options for conductivity or appearance. For outdoor or humid settings, stainless steel is preferred; for cost-effective indoor use, coated carbon steel can be suitable. Consistent length and head style help maintain assembly repeatability and automation performance. For global buyers, a trusted OEM partner should provide clear certifications (ISO 9001), traceability, and documented inspection practices. Look for packaging optimized for automation (reels or sorted bins) and the option for dual-sourcing to reduce risk. Ask for lead times, minimum order quantities, and scalable capacity to support design changes. Ensure the partner can tailor specifics—length, finish, drive type—and deliver on time with transparent logistics, aligned to current-year procurement needs and regulatory requirements.

{ 4-40 unc Torx screws For the Current Year Your Trusted OEM Partner}
Part Number	Description	Thread Size	Diameter (mm)	Length (mm)	Head Type	Material	Finish	Drive Type	Compliance
4-40-TORX-SS-08	Torx socket cap screw, 4-40 UNC, stainless steel	4-40 UNC	2.84	8	Socket Cap	316 Stainless Steel	Bright Passivated	Torx T4	RoHS
4-40-TORX-SS-10	Torx socket cap screw, 4-40 UNC, stainless steel	4-40 UNC	2.84	10	Socket Cap	A2-70 Stainless	Bright Passivated	Torx T4	RoHS
4-40-TORX-ZP-12	Torx pan head screw, 4-40 UNC, zinc plated steel	4-40 UNC	2.84	12	Pan Head	Carbon Steel	Zinc Plated	Torx T4	RoHS
4-40-TORX-BH-08	Torx button head screw, 4-40 UNC, carbon steel	4-40 UNC	2.84	8	Button Head	Carbon Steel	Black Oxide	Torx T4	RoHS
4-40-TORX-PH-12	Torx pan head machine screw, 4-40 UNC, zinc plated	4-40 UNC	2.84	12	Pan Head	Carbon Steel	Zinc Plated	Torx T4	RoHS
4-40-TORX-SS-16	Torx socket cap screw, 4-40 UNC, stainless steel	4-40 UNC	2.84	16	Socket Cap	A2-70 Stainless	Bright Passivated	Torx T4	RoHS
4-40-TORX-SS-20	Torx socket cap screw, 4-40 UNC, stainless steel	4-40 UNC	2.84	20	Socket Cap	316 Stainless Steel	Bright Passivated	Torx T4	RoHS
4-40-TORX-AL-08	Torx pan head screw, 4-40 UNC, aluminum 6061-T6	4-40 UNC	2.84	8	Pan Head	6061-T6 Aluminum	Natural	Torx T4	RoHS
4-40-TORX-SS-06	Torx button head screw, 4-40 UNC, stainless steel	4-40 UNC	2.84	6	Button Head	316 Stainless Steel	Bright Passivated	Torx T4	RoHS

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4-40 unc Torx screws Factory Now Trending

Thread Size and Drive Type Popularity

This chart visualizes a synthetic dataset representing the relative popularity of different drive types across common UNC thread sizes used in fasteners. The four thread sizes examined are 4-40, 6-32, 8-32, and 10-24, and the drive types considered are Torx, Phillips, Hex, and Slotted. Each bar is stacked to reflect the total demand for a given size, with segments indicating the share contributed by each drive type. The total per size is scaled to fit within the chart height, enabling a compact, readable comparison across sizes. While the numbers here are illustrative, the approach mirrors how procurement and production teams monitor tool compatibility, part availability, and tooling investments. Analyzing the distribution across sizes helps identify which drive types dominate for the most commonly used thread sizes, as well as where diversification may reduce risk. For instance, a large Torx segment in several bars might indicate a need to stock Torx tooling more heavily, whereas a more balanced mix across sizes suggests a broader tooling strategy. This visualization supports decisions around supplier negotiations, inventory planning, and tooling optimization. It also provides a foundation for expanding the analysis with time-series data, regional demand, or supplier lead times to sharpen forecasting and operational planning. In practice, adopting such data-driven charts can lead to improved turnaround times, reduced stockouts, and cost-efficient tooling management, ultimately aligning fastener manufacturing operations with real-world demand signals.

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Frances 2022.12.29 17:43:43
The company leader recept us warmly, through a meticulous and thorough discussion, we signed a purchase order. Hope to cooperate smoothly
Teresa 2022.12.20 22:27:54
Perfect services, quality products and competitive prices, we have work many times, every time is delighted, wish continue to maintain!
Alberta 2022.12.11 05:25:47
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Muriel 2022.12.04 19:20:38
In China, we have many partners, this company is the most satisfying to us, reliable quality and good credit, it is worth appreciation.
Pearl Permewan 2022.12.04 12:59:49
After the signing of the contract, we received satisfactory goods in a short term, this is a commendable manufacturer.
Kevin Ellyson 2022.12.02 19:46:03
Although we are a small company, we are also respected. Reliable quality, sincere service and good credit, we are honored to be able to work with you!

Ann 2022.12.23 20:10:48

The factory has advanced equipment, experienced staffs and good management level, so product quality had assurance, this cooperation is very relaxed and happy!
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This enterprise in the industry is strong and competitive, advancing with the times and develop sustainable, we are very pleased to have a opportunity to cooperate!
Margaret 2022.12.10 05:10:46

The quality of the products is very good, especially in the details, can be seen that the company work actively to satisfy customer's interest, a nice supplier.
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The company account manager has a wealth of industry knowledge and experience, he could provide appropriate program according our needs and speak English fluently.