What types of fasteners does YH Fastener manufacture?

We manufacture machine screws, self tapping screws, sealing screws, shoulder screws, sems screws, captive screws, security screws, nylon patch screws, carbide insert screws and set screws, plus hex keys, Torx keys and spring and ball plungers, in both standard and custom versions.

Can you produce non-standard screws from my drawings?

Yes. Our engineering team reviews 2D drawings, 3D models or physical samples, confirms material, head style, drive, thread and finish, and then builds tooling for cold heading and thread rolling. Non-standard and international-standard parts are both supported.

Which quality certifications does your factory hold?

Our production system operates under ISO 9001, ISO 14001 and IATF 16949. Every batch passes multi-stage inspection from incoming wire rod to final packing, and inspection records can be provided with shipments.

How do you prevent screws from loosening under vibration?

Depending on the application we recommend pre-applied nylon patches, sems screws with captive washers, or shoulder and sealing designs. The right solution is selected based on joint material, required re-use cycles, torque and operating temperature.

Do you export to my country and how do I start a project?

YH Fastener ships to more than 60 countries. Request our catalog or contact our sales engineers with your drawing, quantity and target application, and we will reply with a technical review within 24 hours.

Custom Waterproof Sealing Screws Industrial O Ring Fasteners Wholesale OEM ODM Manufacturer Supplier Factory Direct

What You Can Get (Specs & Custom Options)

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Sizes we work with: Threads from M2 to M20, lengths 5mm–100mm, head styles (pan, round, flat) — and if you need something off-book (weird thread pitch, unique head diameter), send over your drawing; we’ll make it.

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Seal gaskets to match your space: Pick NBR (for oil-heavy areas), EPDM (outdoor/wet spots), silicone (high-heat gear), or Viton (chemical-resistant setups) — no generic gaskets here.

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Base materials & finishes: 304/316 stainless steel (won’t rust in damp spots), carbon steel (for heavy strength); finishes like zinc plating (extra rust protection) or passivation (tougher against corrosion).

Where These Screws Actually Work

These aren’t just “sealing screws” — they’re for setups where leaks or gunk break things:

01

Hydraulic/pneumatic gear

Seal valve covers or cylinder parts so hydraulic oil stays put (no messy, expensive leaks).

02

Outdoor electrical boxes

Lock junction boxes/sensor housings tight — rain and dust won’t fry your equipment.

03

Chemical processing machines

Fasten reactor lids or pipeline flanges — corrosive liquids won’t seep out (or in).

04

Medical gear casings

Keep sterile environments sterile — no dust or moisture getting into sensitive instruments.

How We Make Them (And Keep Them Good)

Our build process:

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Cut raw material, then cold-head to shape the screw (tough, no weak spots).

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Roll threads (way more precise than cutting — threads hold tighter).

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Press-fit gaskets with machines (no loose seals from hand-fitting).

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Add finish (plating/passivation) then check every part.

How we make sure they don’t fail:

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Measure every screw (calipers, thread gauges) — no “close enough” sizes.

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Pressure-test seals (up to 10MPa, 24 hours no leaks).

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Salt-spray test (48–120 hours) — if they rust, we scrap ’em.

Quick Tips for Installing (So They Work Right)

1.

Wipe the mounting surface clean first (no dirt or oil under the gasket — that kills the seal).

2.

Use a torque wrench (don’t crank it too hard — you’ll crush the gasket and ruin the seal).

3.

For hot/chemical spots: Check the seal every 6–12 months (swap the gasket if it looks cracked/dry).

Why Pick Us Over Generic Screws?

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Your specs, fast: Non-standard designs can be sampled within half a month, without the need to wait for a long time for mold opening.

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No batch surprises: Whether you need 100 or 100,000, every screw’s the same quality.

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We help you pick: Not sure which material/gasket? Tell us your setup — we’ll point you to what works.

Professional Customization

Have other questions for us?

Ask our experts directly!

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Frequently Asked Questions

1. What materials and finishes are available for custom sealing screws?

We manufacture sealing fasteners in grade 304 and 316 stainless steel for exceptional corrosion resistance, as well as high-strength carbon steel. Available surface finishes include clear/yellow zinc plating, black oxide, and chemical passivation.

2. How do I select the right O-ring or gasket material?

The ideal gasket material depends on your working environment: NBR is best for oil and fuel resistance; EPDM performs optimally in outdoor, weather-exposed, and steam applications; Silicone handles extreme high/low temperatures; Viton (FKM) is recommended for aggressive chemical and solvent exposure.

3. Can you manufacture screws according to custom technical drawings?

Yes. We specialize in custom thread pitches, non-standard diameters, customized head designs, and specific under-head groove dimensions to seat the seal precisely. Custom prototyping samples can typically be delivered within half a month.

4. How are the sealing screws pressure tested?

Our sealing screws undergo hydrostatic and pneumatic pressure testing up to 10 MPa for continuous 24-hour periods to ensure leak-free performance under rigorous industrial operating loads.

5. Are the sealing gaskets reusable after disassembly?

While our pre-assembled gaskets are made of elastic, resilient compounds, we recommend inspecting the seal upon disassembly. If the elastomer shows signs of flattening, cracking, or chemical degradation, replacing the gasket is advised to ensure optimal sealing integrity.

6. What is the typical turnaround time for orders?

Standard catalog items and rapid prototypes are delivered in approximately 10 to 15 days, while high-volume production schedules are adjusted to meet customer supply chain and delivery requirements.

ODM Custom Sealing Screws: Industrial Waterproof Fasteners Manufacturers, Supplier

Product Description

What You Can Get (Specs & Custom Options)