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Sealed [Closed] Blind Rivets

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CLOSED End “CUP”

Also known as Sealed Blind Rivet.

Designed with a completely closed body, this rivet is ideal for applications that need to be water/pressure tight or where mandrel retention is paramount.

Used for providing a leak-proof joint.

 

 

Head Styles

 

 

 

 

 

 


Dome Head

Dome Headed or sometimes called Round head blind rivet is the most versatile and commonly used type whose lower profile head is approx. twice the diameter of the rivet body.

This provides adequate bearing surface for nearly all applications where metals are being joined.

 

Available in a number of material combinations.

Aluminium:

Aluminium-Steel – Lightweight and inexpensive. Easily available. Has low strength. Rivets can tear/fail with load.

Download-Datasheet AL-ST

Aluminium-Aluminium  – Extremely lightweight and useful for Aerospace applications. Low strength. Usage must be carefully planned for load.

Download-Datasheet AL-AL

Aluminium – Stainless Steel – This combination has excellent corrosion resistance and better strength. Offers a flexible option for many situations.

Download-Datasheet AL-SS


Steel:

Steel-Steel          – Good strength and relatively low cost of rivet. As the rivet body is Steel they are subject to corrosion.

Stainless Steel – Stainless Steel – Has excellent corrosion resistance and high strength. Rivets are relative expensive and require stronger tools for installation.

Download Datasheet A2-A2

Stainless Steel – Steel – This combination permits easier installation because the steel mandrel breaks easily compared to an SS one. Reduced cost as compared with SS mandrel.


Copper:

Copper-Steel  – Use where electrical conductivity is required.

Download Datasheet CU-ST

Copper-Stainless Steel  – Use where electrical conductivity and corrosion resistance is required.

Download Datasheet CU-SS


CSK Head

 

Countersunk or CSK head profile provides a neat and flush finish to the joint.

This enables multiple layered assembly and also a safe surface without any projection.

 

 

Available in a number of material combinations.

Aluminium – Aluminuim            Download-Datasheet AL-AL

Aluminium – Steel                    Download-Datasheet AL-ST

Aluminium – Stainless Steel       Download-Datasheet AL-A2

Stainless Steel – Stainless Steel Download-Datasheet A2-A2


Material Usage Guide

Galvanic Corrosion • When dissimilar metals come into contact in the presence of an electrolyte, a galvanic action occurs which corrodes one metal at a faster rate and the other more slowly. This phenomenon can cause major riveted joint failures and care must be taken to avoid the occurrence. The following table is a guide.

METAL JOINED
RIVET MATERIAL↓ Aluminium Coated Steel Stainless Steel Copper Brass
Aluminium YES CARE NO NO NO
Coated Steel NO YES NO NO NO
Stainless Steel CARE CARE YES YES YES
Copper NO NO YES YES YES
Monel NO NO YES YES YES
YES Compatible
NO Incompatible – Avoid contact with each other
CARE Use with care. Painting metals will help

Hence,

1) Select materials that are as close together as possible in the Galvanic
Series Chart
2) Provide a barrier between the two metals, such as paint, non-metallic
washer or gaskets
3) Design the fastener as the cathode so the cathodic area is small as
compared to the anodic area
4) Use a metallic finish on the fastener that is close on the chart to the
mating material

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