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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List of references
Filters
Screw diameter [mm]
4.2
4.8
Close
Screw length [mm]
13
16
19
25
Close
Head diameter [mm]
11
12
Close
Head height [mm]
2.35
2.6
3.1
Close
Reference
d
J
94213BTT
94216BTT
94219BTT
94225BTT
94819BTT
94825BTT
9X4825BTT
Diameter [mm]
d
J
4.2
4.2
4.2
4.2
4.8
4.8
4.8
Length [mm]
d
J
13
16
19
25
19
25
25
Screw diameter [mm]
d
J
4.2
4.2
4.2
4.2
4.8
4.8
4.8
Screw length [mm]
d
J
13
16
19
25
19
25
25
Screw material
d
J
Steel
Steel
Steel
Steel
Steel
Steel
-
Head diameter [mm]
d
J
11
11
11
11
12
12
12
Head height [mm]
d
J
2.35
2.6
2.35
2.6
3.1
3.1
3.1
Packaging units
d
J
500
500
250
250
500
500
500
Packaging type.
d
J
Box
Box
Box
Box
Box
Box
Box
A
t
7 / 7 references
Applications
  • Metal profile fittings
  • Metal facades
  • Fittings
Base materials
  • Metal sheet

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