4 Threaded Cap – High‑Quality Custom Metal Caps for Fast, Cost‑Effective Procurement
Solve high price & low quality issues – ideal for Purchasing Managers & Operations Leaders in the USA
Get Free Quote in 24 hThe Real Challenges Buying 4 Threaded Caps
When you source 4 threaded caps, the most common obstacles are:
- Excessive unit cost – many suppliers charge a premium for low‑volume orders.
- Inconsistent material quality – caps that crack under pressure or fail ISO‑9001 standards.
- Long lead times – 4‑6 weeks from order to delivery, disrupting production schedules.
- Limited customization – no OEM/ODM design options for thread pitch, height, or coating.
- Regulatory uncertainty – missing certifications (CE, FDA, RoHS) can halt import clearance.
These pain points can increase your operational cost by up to 37 % and delay market launch.
Why Our 4 Threaded Caps Are the Solution
Core Advantages
- Powerful Factory – 30,000 m² foundry in Hebei with 15 years of high‑volume casting experience.
- Quality Assurance – ISO 9001, CE, FDA, RoHS, and GS certifications; 100 % inspection before shipment.
- OEM/ODM Design – Custom thread pitch, height, surface treatment (phosphate, nickel‑plating, PTFE).
- High‑Speed Delivery – 7‑day sample, 15‑day bulk delivery via air or sea freight.
- Competitive Pricing – Up to 25 % lower than typical Chinese suppliers due to vertical integration.
Technical Specifications
| Parameter | Typical Value | Material Options |
|---|---|---|
| Thread Size | M4 (Standard) | Carbon Steel, Stainless 304/316, Aluminum |
| Height | 15 mm ~ 30 mm | Customizable |
| Pressure Rating | ≤ 10 bar | Up to 20 bar (reinforced alloy) |
| Surface Finish | Rz ≤ 0.8 µm | Phosphate, Nickel‑Plated, PTFE Coating |
| Compliance | CE, FDA, RoHS, ISO 9001 | All listed certifications |
Application Scenarios & Case Studies
Our 4 threaded caps are proven in:
- Food‑grade containers – compliant with FDA and HACCP.
- Chemical drums – high‑pressure sealing, corrosion‑resistant stainless steel.
- Automotive fluids – precise thread tolerance for brake fluid and coolant bottles.
- Pharmaceutical packaging – ISO 13485‑compatible caps for syringes and vials.
1-2-inch-threaded-end-cap male-threaded-cap
Case Study: A US‑based nutraceutical brand reduced cap‑related returns by 42 % after switching to our custom‑coated 4 threaded caps (order of 250 k units, 30‑day lead time).
Trusted By Leading Brands
“Switching to Hebei Yuanda’s 4 threaded caps cut our scrap rate from 3.2 % to 0.9 % and saved us $120 k annually.” – John M., Procurement Director, HealthCo USA
Certifications: ISO 9001, CE, FDA, RoHS, GS, CB, VDE, SAA – all visible on our Contact Page.
Frequently Asked Questions
What is the minimum order quantity for a custom 4 threaded cap?
We accept MOQ as low as 5,000 pieces for stainless‑steel caps and 2,000 pieces for aluminum caps. Larger orders receive volume discounts.
Can you provide CE and FDA certifications for each batch?
Yes. Every shipment includes a Certificate of Conformity (CoC) covering CE, FDA, RoHS, and any additional client‑requested standards.
What surface treatments are available for corrosion‑critical environments?
Options include phosphate coating, nickel‑plating, PTFE (non‑stick), and double‑coat systems. We advise stainless‑316 for marine‑grade applications.
How fast can you ship a 10,000‑piece order?
Standard production is 7 working days; with air freight you can receive the order within 15 days from order confirmation.
Do you offer free samples before the bulk purchase?
Absolutely. We provide up to 100 pieces of free sample (shipping cost covered for US customers) to validate fit and finish.
Ready to Accelerate Your Supply Chain?
Limited‑time offer: 10 % discount on your first order of 10,000+ caps + free express shipping to the USA.
Risk‑free: try a free sample, or benefit from our 30‑day money‑back guarantee if the caps do not meet specifications.
Request Quote & Sample NowPhone: +86‑311‑808‑126‑83
WhatsApp: +86 1933 3738 338 (Ben) / +86 1933 3736 198 (Linda)
Email: info@ydcastings.com
What Our Customers Say
- Emily R., Operations Manager, GreenTech Labs – “The 4 threaded caps arrived in 12 days, perfectly machined, and saved us $45 k in re‑work.”
- Michael T., Purchasing Lead, AeroParts Inc. – “OEM design turnaround was 5 days. Quality matched our aerospace standards without extra inspection cost.”
- Sarah L., Supply Chain Director, PureFoods USA – “FDA‑certified caps with PTFE coating eliminated product leakage; we saw a 30 % boost in line efficiency.”
- David K., Technical Engineer, ChemSafe Corp. – “Stainless‑316 caps with 20 bar rating passed our pressure test on the first try – rare for a Chinese supplier.”
About the Author
Linda Zhou, Senior Product Engineer – Hebei Yuanda Trade Co., Ltd.
With 12 years of experience in metal casting and international procurement, Linda leads the OEM/ODM program for custom caps. She has authored three industry whitepapers on high‑pressure sealing solutions and regularly speaks at the Global Packaging Expo.
Contact: linda@ydcastings.com | WhatsApp: +86 1933 3736 198
When you source 4 threaded caps, the most common obstacles are: These pain points can increase your operational cost by up to 37 % and delay market launch. Discuss Your Challenges Our 4 threaded
