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Vented Screws

Vented Screw is commonly translated as exhaust screw, vacuum screw, or hollow screw in Chinese. It is a special screw product designed with a through type vent hole/groove at the center or specific position of the fastener.
  • Socket Vented Screw

  • PDM

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Features of Socket Head Vented Screws


Vented Cap Head Screws Title:

High Strength vented button head screws stainless steel vented vacuum m6 screw 316 for fastening


Socket Head Vented Screw Specifications:

The core function is to provide an exhaust channel for air, gas, and pollutants in blind holes (threaded holes with one end closed) during the fastening process, avoiding gas entrapment and forming a "virtual leak", while balancing pressure, preventing material damage or system performance degradation. It is widely used in scenarios with strict requirements for sealing, vacuum degree, or assembly accuracy.


Screw Type: Hexagonal cylinder head exhaust screw, countersunk exhaust screw, pan head exhaust screw, tightening exhaust screw, etc


Material and type: Common materials include stainless steel (such as 304), alloy steel, etc., to meet the requirements of corrosion resistance and high strength. Structurally, it is divided into full thread and partial thread, and the central hole can be divided into through-hole and blind hole.


Material and surface treatment: Materials include stainless steel (300 series, A2), carbon steel, brass, plastic, etc; Surface treatment includes galvanizing, blackening, passivation, vacuum cleaning, etc;


Accuracy level: ordinary level (suitable for conventional scenarios), precision level (tolerance ± 0.01mm, suitable for precision instruments and vacuum systems), ensuring the stability of assembly accuracy and ventilation effect.


Thread specifications: metric (M3-M100), imperial (# 4-4 "), supports coarse and fine threads, adapts to different blind hole thread sizes, and meets different fastening strength requirements;


Screw length: Conventional 3mm-100mm, can be customized according to the depth of blind holes to ensure that the ventilation channel can penetrate the entire length of the screw, covering the gas retention area inside the blind hole and achieving thorough exhaust.

vented socket set screw

vented set screw

Socket Head Cap Vented Screws
M x L M x P A E B d
M3 x 6 M3 x 0.5 5.5 3 2.5 1.2
M3 x 8 M3 x 0.5 5.5 3 2.5 1.2
M3 x 10 M3 x 0.5 5.5 3 2.5 1.2
M3 x 12 M3 x 0.5 5.5 3 2.5 1.2
M3 x 15 M3 x 0.5 5.5 3 2.5 1.2
M4 x 6 M4 x 0.7 7 4 3 1.5
M4 x 8 M4 x 0.7 7 4 3 1.5
M4 x 10 M4 x 0.7 7 4 3 1.5
M4 x 12 M4 x 0.7 7 4 3 1.5
M4 x 15 M4 x 0.7 7 4 3 1.5
M4 x 20 M4 x 0.7 7 4 3 1.5
M5 x 8 M5 x 0.8 8.5 5 4 1.5
M5 x 10 M5 x 0.8 8.5 5 4 1.5
M5 x 12 M5 x 0.8 8.5 5 4 1.5
M5 x 15 M5 x 0.8 8.5 5 4 1.5
M5 x 20 M5 x 0.8 8.5 5 4 1.5
M5 x 25 M5 x 0.8 8.5 5 4 1.5
M6 x 8 M6 x 1.0 10 6 5 2
M6 x 10 M6 x 1.0 10 6 5 2
M6 x 12 M6 x 1.0 10 6 5 2
M6 x 15 M6 x 1.0 10 6 5 2
M6 x 20 M6 x 1.0 10 6 5 2
M6 x 25 M6 x 1.0 10 6 5 2
M6 x 30 M6 x 1.0 10 6 5 2
M8 x 12 M8x 1.25 13 8 6 2
M8 x 15 M8x 1.25 13 8 6 2
M8 x 20 M8x 1.25 13 8 6 2
M8 x 25 M8x 1.25 13 8 6 2
M8 x 30 M8x 1.25 13 8 6 2
M10 x 15 M10x 1.5 16 10 8 2
M10 x 20 M10x 1.5 16 10 8 2
M10 x 25 M10x 1.5 16 10 8 2
M10 x 30 M10x 1.5 16 10 8 2

Hexagon Socket Cup Point Vented Set Screws
M x L M x P B t d
M3 x 8 M3 x 0.5 1.5 0.7 1.2
M3 x 10 M3 x 0.5 1.5 0.7 1.2
M3 x 15 M3 x 0.5 1.5 0.7 1.2
M4 x 12 M4 x 0.7 2.0 2.2 1.5
M4 x 15 M4 x 0.7 2.0 2.2 1.5
M4 x 20 M4 x 0.7 2.0 2.2 1.5
M4 x 25 M4 x 0.7 2.0 2.2 1.5
M5 x 15 M5 x 0.8 2.5 2.8 1.5
M5 x 20 M5 x 0.8 2.5 2.8 1.5
M5 x 25 M5 x 0.8 2.5 2.8 1.5
M5 x 30 M5 x 0.8 2.5 2.8 1.5
M6 x 15 M6 x 1.0 3.0 3.0 2.0
M6 x 20 M6 x 1.0 3.0 3.0 2.0
M6 x 25 M6 x 1.0 3.0 3.0 2.0
M6 x 30 M6 x 1.0 3.0 3.0 2.0
M8 x 20 M8 x 1.25 4.0 4.0 2.0
M8 x 25 M8 x 1.25 4.0 4.0 2.0
M8 x 30 M8 x 1.25 4.0 4.0 2.0
M8 x 35 M8 x 1.25 4.0 4.0 2.0

Hexagon Socket Low Head Cap Vented Screws
M x L M x P A E B d
M3 x 6 M3 x 0.5 5.5 2 2.0 1.2
M3 x 8 M3 x 0.5 5.5 2 2.0 1.2
M3 x 10 M3 x 0.5 5.5 2 2.0 1.2
M3 x 12 M3 x 0.5 5.5 2 2.0 1.2
M3 x 16 M3 x 0.5 5.5 2 2.0 1.2
M4 x 6 M4 x 0.7 7 2.8 2.5 1.5
M4 x 8 M4 x 0.7 7 2.8 2.5 1.5
M4 x 10 M4 x 0.7 7 2.8 2.5 1.5
M4 x 12 M4 x 0.7 7 2.8 2.5 1.5
M4 x 16 M4 x 0.7 7 2.8 2.5 1.5
M4 x 20 M4 x 0.7 7 2.8 2.5 1.5
M5 x 10 M5 x 0.8 8.5 3.5 3 1.5
M5 x 12 M5 x 0.8 8.5 3.5 3 1.5
M5 x 16 M5 x 0.8 8.5 3.5 3 1.5
M5 x 20 M5 x 0.8 8.5 3.5 3 1.5
M5 x 25 M5 x 0.8 8.5 3.5 3 1.5
M6 x 10 M6 x 1.0 10 4 4 2
M6 x 12 M6 x 1.0 10 4 4 2
M6 x 16 M6 x 1.0 10 4 4 2
M6 x 20 M6 x 1.0 10 4 4 2
M6 x 30 M6 x 1.0 10 4 4 2


Application:

Widely used in vacuum equipment, such as semiconductor manufacturing (FAB machine), LED epitaxial equipment (MOCVD), analytical instruments (Agilent), etc., where high vacuum requirements are needed.


set screw with through hole


Advantages:

It can significantly shorten the pumping time, improve the stability of vacuum degree, reduce pollution, and is a key component to ensure equipment performance.


Ventilation structure (core): divided into two mainstream designs - center through ventilation hole (most commonly, the screw axis is drilled with a through hole from beginning to end) and side groove ventilation (ventilation groove is designed on the screw shaft or head), among which the center through type can achieve more efficient gas discharge, and the side groove type is more suitable for the gas evacuation needs of threaded parts;


The basic structure is consistent with ordinary screws: retaining core components such as the head (hexagonal head, inner hexagonal head, pan head, countersunk head, etc.), screw, thread, etc. The installation method is exactly the same as ordinary screws, without the need for special tools, and is compatible with conventional wrenches, screwdrivers, and other assembly tools;


Adaptive design: Can be used with ventilated washers to further improve gas exhaust efficiency, avoid secondary gas retention between washers and screw heads, and achieve comprehensive exhaust, especially suitable for high vacuum systems.

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