Self-drilling screw mushroom head BTT

Self-drilling screw wider head and SIT recess for easier screwing
Self-drilling screw mushroom head BTT
Self-drilling screw mushroom head BTT
Product overview

CELO's self-drilling screw BTT mushroom head and SIT recess which brings a perfect fit between recess and screw for easy screwing. The SIT recess allows a perfect transmission of the tightening torque. Its conical inner shape centers the screwing and keeps the screw fixed to the recess, facilitating its installation. Made of high-quality steel and stainless steel with blue zinc plated and aluminium zinc flakes which resist 480 HNS.

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Reference
94213BTT
94216BTT
94219BTT
94225BTT
94819BTT
9K44819BTT
94825BTT
9K44825BTT
9X4825BTT
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Screw material
Steel
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Head diameter [mm]
11
12
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Head height [mm]
2.35
3.1
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Point type
Selfdrilling
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Suitable for
Metal sheet assembly
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Packaging units
500
250
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Packaging type
Box
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Column
Reference
Screw material
Head diameter [mm]
Head height [mm]
Point type
Suitable for
Packaging units
Packaging type
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Ascending
Descending
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Reference
94213BTT
94216BTT
94219BTT
94225BTT
94819BTT
9K44819BTT
94825BTT
9K44825BTT
9X4825BTT
Length
13
16
19
25
19
19
25
25
25
Diameter
4.2
4.2
4.2
4.2
4.8
4.8
4.8
4.8
4.8
Screw material
Steel
Steel
Steel
Steel
Steel
Steel
Steel
Steel
-
Head diameter [mm]
11
11
11
11
12
12
12
12
12
Head height [mm]
2.35
2.35
2.35
2.35
3.1
3.1
3.1
3.1
3.1
Point type
Selfdrilling
Selfdrilling
Selfdrilling
Selfdrilling
Selfdrilling
Selfdrilling
Selfdrilling
Selfdrilling
Selfdrilling
Suitable for
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Metal sheet assembly
Packaging units
500
500
250
250
500
500
500
500
500
Packaging type
Box
Box
Box
Box
Box
Box
Box
Box
Box
9 / 9 references are shown
Applications
  • Metal profile fittings
  • Metal facades
  • Fittings
Further specifications

Key features:

  • This oversized hole allows the expansion of the plate absorbing any dilation
  • The SIT recess allows a perfect power transfer to the screw thanks to the conial form

Base materials:

  • Metal sheet

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