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Company
Bossard Catalog
Description
BN 991 - Slotted oval countersunk head tapping screws with cone end type C (DIN 7973 C; ~ISO 1483), zinc plated blue
Bill of material
BN 991 1373862 slotted oval countersunk head tapping screw C 3.5x13
BNARTNR
Identification
BNNORM1
DIN 7973 C
BNNORM2
~ISO 1483
BNMAT
Material
Steel, case hardened 450 HV
BNSURFACE
Surface
zinc plated blue
D
Nominal thread diameter
mm
D3
Nominal core diameter
mm
P
Pitch
mm
L
Nominal length
mm
DK
Head diameter
mm
K
Head height ~
mm
A
Distance from the last full form thread to the bearing face
mm
F
Height of the raised portion of the head screw ~
mm
N
Width of slot
mm
R
Transition radius under head max.
mm
RF
Radius of the raised portion of a head
mm
T
Depth of the driving feature max.
mm
Y
Length of point of shank Form C
mm
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Anteprime
3D
Dimensione
2D
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