Drilled Socket Head Cap Screws & Extra Long Socket Head | Sale
๐ฉ Drilled Socket Head Cap Screws & Extra Long Socket Head โ Factory Direct
Eliminate thread-locking failures & reduce total cost of ownership with precision-engineered drilled socket head cap screws and extra long socket head cap screws โ built for high-vibration, heavy-load applications.
โ๏ธ Handan Boen โ 30,000+ mยฒ smart factory
โ ๏ธ The Hidden Cost of Cheap Fasteners in High-Stress Environments
Vibration Loosening
68% of unscheduled downtime in heavy machinery is traced to fastener failure (2025 Industry Benchmark Report).
Hidden TCO Spikes
Replacing substandard screws 3x per year adds 37% more cost than investing in premium drilled socket head cap screws once.
Length Limitations
Standard screws often can't reach deep thread engagements. Extra long socket head cap screws bridge that gap โ but many suppliers don't stock them.
Supply Chain Delays
Lead times of 12โ18 weeks from traditional mills force costly last-minute airfreight. Boen's factory-direct model cuts that to 4โ6 weeks.
๐ You're not alone โ procurement managers report that 1 in 4 fastener orders fail quality checks on arrival. We fix that.
โ Boen's Solution: Precision, Strength & Global Reach
Whether you need drilled socket head cap screws for safety-wiring or extra long socket head cap screws for deep-bolt applications, our factory delivers consistent quality.
Full Material Traceability
Alloy steel 12.9 / 10.9, stainless 304 / 316 โ with mill certificates and batch trace codes.
Drilled & Slotted Options
Cross-hole, side-hole, or slot โ per NAS, MS, or custom drawings. Extra long socket head cap screws up to 500 mm available.
Dimensional Consistency
Cpk โฅ 1.67 on key threads and head dimensions. Every batch is tested with optical comparators and torque analyzers.
Global Logistics, Local Service
DDP / FOB / CIF โ we handle customs, duties, and door-to-door tracking. 30+ countries, 4โ6 week lead time.
๐ Technical Specifications โ Drilled Socket Head Cap Screws
| Parameter | Standard Range | Boen Capability |
|---|---|---|
| Thread size | M3 โ M36 | M3 โ M48 (custom on request) |
| Length (extra long) | 10 mm โ 300 mm | Extra long socket head cap screws up to 500 mm |
| Drill hole diameter | 1.0 mm โ 6.0 mm | ยฑ0.05 mm tolerance |
| Material grades | 12.9 / 10.9 / 304 / 316 | All with mill certs + 3rd-party tests |
| Coating / plating | Zinc, black oxide, HDG, Dacromet | 48+ h neutral salt spray (NSS) standard |
๐ All drilled socket head cap screws meet NAS 6703 / MS 24665 / DIN 912 standards. Custom lengths, hole positions, and packaging available.
๐ Trusted by Global OEMs & Distributors
+ 50+ industrial partners
ISO 9001 ยท CE ยท RoHS ยท FCC
โWe switched to Boen's drilled socket head cap screws for our turbine assembly line. Reject rate dropped from 4.7% to 0.3% โ and their extra long socket head cap screws arrived 4 weeks faster than our previous supplier.โ
โ Frequently Asked Questions
What are drilled socket head cap screws used for?
They are designed for safety-wiring or locking wire applications in high-vibration environments โ aerospace, motorsports, heavy machinery, and military equipment. The cross-hole or side-hole allows a lock wire to secure the screw.
Do you offer extra long socket head cap screws beyond standard lengths?
Yes. Our standard range goes up to 300 mm, but we regularly produce extra long socket head cap screws up to 500 mm in diameters M6โM30. For longer requirements, please contact our engineering team for a custom quote.
What is the minimum order quantity (MOQ) for drilled socket head cap screws?
For standard sizes (M3โM20) we accept MOQ of 500 pcs per size. For extra long socket head cap screws or custom diameters, MOQ is 200 pcs. We also offer sample orders (50โ100 pcs) for qualification.
How do you ensure quality consistency across batches?
Every production lot is tested for hardness, tensile strength, thread gauging, and hole position. We provide a Certificate of Conformance (CoC) with each shipment. Third-party inspections (SGS, TรV) are also available.
What shipping options do you offer to the USA and Europe?
We ship via sea (FOB, CIF, DDP) and air freight. Typical lead time: 4โ6 weeks for standard orders, 2โ3 weeks for express. We handle all customs documentation and can deliver DDP to your warehouse.
Can you customize the drilling position or slot orientation?
Absolutely. We frequently produce custom hole patterns per customer drawings. Whether you need a 90ยฐ cross-hole, a single side-hole, or a slotted head, our tooling team can accommodate with a short setup time.
Do you provide free samples for evaluation?
Yes. We offer free samples (up to 10 pcs) for standard sizes. You only pay for shipping. For extra long socket head cap screws or custom items, we charge a nominal sample fee, refundable on the first production order.
โญ What Our Customers Say
โWe use Boen's drilled socket head cap screws in our press line. The hole alignment is precise, and the thread fit is consistent. Lead time was 5 weeks โ incredible.โ
โI needed extra long socket head cap screws for a hydraulic cylinder repair. Boen had them in stock and shipped within 72 hours. Saved my project timeline.โ
โWe tested 5 suppliers for drilled cap screws. Boen delivered the best dimensional accuracy and the shortest lead time. Now our preferred partner.โ
โBoen's customer service is outstanding. They helped me choose the right coating for our marine environment. Extra long socket head cap screws in 316 stainless โ perfect.โ
15+ years in industrial fastener design and manufacturing. I've overseen over 800 production runs of drilled socket head cap screws and extra long socket head cap screws for global clients. Every spec in this article is backed by our factory's real capabilities.
๐ Ready to Secure Your Fastener Supply Chain?
Get factory-direct pricing on drilled socket head cap screws & extra long socket head cap screws.
๐ Daily 09 am โ 05 pm (GMT+8) ยท WhatsApp / Email reply within 2 hours
Handan Boen Fastener Manufacturing Co., Ltd. ยท Hanguang Industrial Park, Yongnian District, Handan, Hebei, China
