captive screw 4-40 - High-Quality Supplier

We are your dependable supplier of captive screw 4-40 solutions, delivering High-Quality fasteners and reliable grip for assemblies across industries. I choose to focus on accuracy, corrosion resistance, and clean thread engagement, because I know in the real world manufacturing little details matters. Our captive screw 4-40 features a precision drive, durable materials, and secure captive nuts that stay in place during vibration and maintenance. As a true Supplier, I can offer stock items and made-to-order finishes to fit your equipment, from aerospace to electronics. You’ll appreciate tight tolerance, easy installation, and consistent performance at scale. We couple quality control with fast shipping, competitive pricing, and proactive support. If you need a trusted partner for captive screw 4-40, I’m here to help you select the right size, finish, and locking style for long-lasting assemblies.

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captive screw 4-40 Sets the Industry Standard Custom Solutions,

Captive screws in the 4-40 family have set the industry standard for secure, repeatable fastening in electronics enclosures, control panels, and precision equipment. They prevent lost hardware, speed up assembly, and deliver consistent clamping force across high-volume lines. With broad compatibility and proven corrosion resistance, 4-40 captive screws offer reliable, interchangeable components for worldwide manufacturing programs. To meet diverse needs, we offer customization built around the 4-40 standard: material options (stainless steel, plated carbon steel, brass); head styles (slotted, Phillips, hex, Torx); and coatings (zinc, black oxide, passivation). We tailor finish, tolerances, preload, and pre-assembly, plus packaging and documentation for global procurement. From prototyping to multi-site production, the focus is quality, traceability, and on-time delivery to reduce risk and streamline supply chains.

captive screw 4-40 Sets the Industry Standard Custom Solutions

Product ID	Material	Finish	Head Style	Thread Size	Length (mm)	Tensile Strength (MPa)	Yield Strength (MPa)	Temperature Range (°C)	Compliance / Standard	Applications
CS4-40-001	AISI 304 Stainless Steel	Polished	Socket Head (Hex)	4-40	6.0	520	205	-60 to 300	RoHS, REACH	Electronics enclosure, Instrumentation, Automotive connectors
CS4-40-002	6061-T6 Aluminum	Anodized	Button Head	4-40	6.0	310	275	-40 to 150	RoHS, REACH	Computer chassis, Consumer electronics
CS4-40-003	Ti-6Al-4V (Grade 5)	Natural	Socket Head	4-40	8.0	950	880	-196 to 400	RoHS, REACH	Aerospace assemblies, High-strength electronics
CS4-40-004	Stainless Steel 316	Brushed	Flat Head	4-40	12.0	520	190	-60 to 300	RoHS, REACH	Marine electronics, Outdoor enclosures
CS4-40-005	Stainless Steel 410	Passivated	Pan Head	4-40	5.0	510	190	-60 to 315	RoHS	Automotive electrical connectors
CS4-40-006	Brass CuZn39Pb3	Nickel-plated	Hex Socket	4-40	10.0	250	140	-20 to 130	RoHS	Instrumentation, meters, non-critical electronics
CS4-40-007	Stainless Steel 316	Electropolished	Hex Socket	4-40	8.0	520	205	-60 to 300	RoHS, REACH	Aerospace enclosures, rugged electronics
CS4-40-008	Phosphor Bronze	Natural	Slotted	4-40	7.0	270	160	-50 to 150	REACH	Electrical components, connectors

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captive screw 4-40 Now Trending Service Backed by Expertise

Data Dimension: Adoption Index for Captive Screw 4-40 in Service-oriented Assemblies

Explanation: This visualization demonstrates a data dimension titled "Adoption Index for Captive Screw 4-40 in Service-oriented Assemblies" across a 12-month horizon. The "Adoption Index" is presented as an arbitrary metric to illustrate relative uptake of captive-screw fastening practices in service-driven applications. The chart uses month-level data points to reveal overall direction, seasonality, and fluctuations in adoption. The line shows a gradual rise from January to December, with a mid-year dip around June–July followed by a rebound toward year-end. The tail-end increase suggests that as projects approach year-end maintenance cycles, installers and engineers lean more on standardized captive-screw solutions, reinforced by service expertise and supply-chain readiness. This pattern aligns with expectations that service-led offerings (design guidance, on-site support, and procurement assistance) contribute to higher adoption when project complexity increases. The horizontal gridlines provide reference levels for quick month-to-month comparisons. The dimension could be extended by adding factors such as application sector, environmental conditions, or batch size to enable more granular insights. For example, a sector-wise breakdown might reveal stronger uptake in automotive service projects versus consumer electronics assemblies, while high-temperature environments may show more conservative adoption. The 3:1 aspect emphasizes long-term momentum rather than short-term fluctuations, aiding strategic planning. It is important to note that the data are synthetic for demonstration; real-world validation is essential before using this measure for decisions. When paired with qualitative inputs from engineers and clients, this dimension can inform training priorities, documentation updates, and inventory planning to better support captive-screw applications. Future enhancements could include interactive tooltips and multiple series for comparative analysis.

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Dee Lopez 2022.12.29 17:10:55
This is a very professional and honest Chinese supplier, from now on we fell in love with the Chinese manufacturing.
Jean 2022.12.24 13:31:01
In our cooperated wholesalers, this company has the best quality and reasonable price, they are our first choice.
Edward 2022.12.24 11:22:25
The goods we received and the sample sales staff display to us have the same quality, it is really a creditable manufacturer.
Atalanta 2022.12.20 15:42:10
The sales manager is very patient, we communicated about three days before we decided to cooperate, finally, we are very satisfied with this cooperation!
Jenny 2022.12.19 06:43:13
Problems can be quickly and effectively resolved, it is worth to be trust and working together.
Barbara 2022.12.02 10:42:01
This supplier offers high quality but low price products, it is really a nice manufacturer and business partner.

Rigoberto Boler 2022.12.26 05:56:53

We are a small company that has just started, but we get the company leader's attention and gave us a lot of help. Hope we can make progress together!
Ina 2022.12.18 12:40:40

We are a small company that has just started, but we get the company leader's attention and gave us a lot of help. Hope we can make progress together!
Madeline 2022.12.16 22:21:50

Timely delivery, strict implementation of the contract provisions of the goods, encountered special circumstances, but also actively cooperate, a trustworthy company!
Erin 2022.12.09 22:23:04

The company's products can meet our diverse needs, and the price is cheap, the most important is that the quality is also very nice.
Anne 2022.12.08 09:34:06

The factory can meet continuously developing economic and market needs, so that their products are widely recognized and trusted, and that's why we chose this company.
Susan 2022.12.05 13:40:09

Company director has very rich management experience and strict attitude, sales staff are warm and cheerful, technical staff are professional and responsible,so we have no worry about product,a nice manufacturer.