Custom Stainless Steel Slotted Pan Head Sealing Screws with O-Ring

Short Description:

Custom stainless steel slotted pan head sealing screws feature a black O-ring positioned beneath the screw head. When installed against a suitable mating surface, the O-ring compresses to help reduce the ingress of moisture, dust, oil and air around the fastening point. Screw size, material, thread specification, head dimensions and O-ring compound can be customized according to drawings, samples and assembly requirements.

Product Detail

Product Tags

Item	Specification
Product Name	Slotted Pan Head Sealing Screws with O-Ring
Head Type	Pan Head or Custom Low-Profile Round Head
Drive Type	Slotted Drive
Thread Type	Metric Machine Thread, UNC, UNF or Custom Thread
Thread Structure	Fully Threaded or Partially Threaded
Size	According to Customer Drawings or Samples; Special Sizes Available upon Evaluation
Standard	DIN, ISO, ANSI, JIS, GB or Customer Drawing
Material	Stainless Steel, Carbon Steel, Alloy Steel, Brass or Other Specified Materials
Strength Grade	Customized According to Material and Assembly Requirements
Surface Treatment	Passivation, Zinc, Nickel, Tin, Black Oxide or Custom Finish
O-Ring Material	NBR, EPDM, Silicone or FKM
O-Ring Color	Black, Red or Customized
Tolerance	According to Drawing and Application Requirements
Custom Service	Size, Head, Thread, O-Ring, Material, Finish, Marking and Packaging
Inspection	Dimensions, Hardness, Torque, Material and Optical Sorting
Application	Electronic Housings, Instruments, Covers, Panels and Industrial Equipment
OEM / ODM	Supported

Key Product Features

Integrated O-Ring Seal

The O-ring is positioned beneath the screw head to form a compressed sealing interface during installation.

Simple Slotted Drive

The straight-slot drive allows installation with commonly available tools and is suitable for manual assembly and maintenance.

Low-Profile Head Design

The rounded pan head provides a broad contact area while maintaining a compact appearance above the mating surface.

Custom Sealing Configuration

Screw dimensions, O-ring compound and sealing contact geometry can be adjusted to suit the customer’s assembly structure.

Typical Uses

Electrical Housings

Suitable for control boxes, switches, terminals and protective covers where localized sealing is required.

Electronic Equipment

Used in electronic housings, communication devices and small assemblies requiring compact fastening and moisture protection.

Precision Instruments

Applicable to instrument panels, measuring devices and inspection equipment where space and appearance are important.

Industrial Equipment

Suitable for equipment covers, control panels, brackets and housings exposed to dust, oil or moisture.

Household Appliances

Can be used in appliance covers, control components and internal assemblies, depending on the operating environment.

Maintenance Panels

The slotted drive is suitable for components that require straightforward manual installation or periodic servicing.

Product Application

Slotted pan head sealing screws are designed for fastening covers, panels and compact housings where both threaded retention and localized environmental sealing are required. The broad head supports the O-ring during compression, while the slotted drive allows simple installation using standard tools.

For reliable sealing performance, the O-ring material, mating-surface condition, screw-head geometry and installation torque should be evaluated together. The final sealing result depends on the complete assembly rather than the screw alone.

Why Slotted Sealing Screws May Still Leak

Insufficient O-Ring Compression

If the screw is not tightened enough, the O-ring may not create continuous contact with the mating surface.

Excessive Compression

Overtightening can flatten, cut or permanently deform the O-ring, reducing its sealing capability.

Incorrect O-Ring Material

An incompatible elastomer may swell, harden or crack after exposure to oil, chemicals, heat or outdoor conditions.

Uneven Mating Surface

Burrs, scratches or gaps beneath the screw head may interrupt the sealing contact.

Incorrect Head Geometry

The screw head must provide enough support to compress the O-ring without forcing it outward or damaging its surface.

About Our Factory

30+ Years of Fastener Manufacturing

Yuhuang has specialized in standard and custom fastener manufacturing since 1998, supporting product development, sampling and mass production.

20,000㎡ Production Area

Our two manufacturing bases cover approximately 20,000 square meters and support cold heading, thread rolling, machining, inspection and packaging.

In-House Manufacturing Capability

Our capabilities include cold heading, thread rolling, CNC machining, automatic lathe machining, mold development, sealing-component assembly and custom packaging.

Laboratory Verification

Available inspection capabilities include dimensional inspection, hardness testing, torque testing, tensile testing, pull-out testing, salt spray testing and material analysis.

Quality Management

Our quality management systems include ISO 9001, ISO 14001 and IATF 16949. RoHS and REACH compliance reports can be provided according to material and order requirements.