SLB 1840: This is a 12 mm fully threaded and slotted head design (SLB) with separate hex nut.
The "18" indicates the required hole size in mm for anchor installation and the "40" is the MAXIMUM
"fixture thickness" or "grip range" recommended in mm. The "40" mm dimension is noted by the
visible groove in the spacer sleeve. This groove is physically located 40 mm under the flat washer
at the head of the anchor. From a functional standpoint this groove represents the MINIMAL
insertion depth required for the anchor. Therefore, this groove should be flush or subset into the
concrete as shown in the photo on the right. Popular sleeve and groove dimensions (in mm)
are 40, 25, 15, and 0.
SLB 1840-15: This part number indicates the 1840 sleeve has been replaced with the 1815 sleeve. By using a shorter
sleeve a 25 mm "gap" (40 mm -15 mm) is available for the addition of plate washers, isolator bushings,
hold-down plates or locking hardware. See our page on custom anchors for more details.
SLS xxxx: This part number designation applies to the head design of the "stud" version anchor.
By cold heading a metric hex head into the shaft a lower profile is obtained. This
reduced height of the anchor head facilitates installation in restricted areas at the base
of racks or enclosures.
The most popular anchor sizes are:
M10: A 10 mm threaded shaft is our designation SLB/SLS 14xx
M12: A 12 mm threaded shaft is our designation SLB/SLS 18xx
M16: A 16 mm threaded shaft is our designation SLB/SLS 24xx.
Other sizes are available including M6, M8, and M20. All anchors are also available in A4 (316 ) stainless steel.
NOTE: MKT Inc. anchors are the "house" anchors used by one of the premier testing labs in the Southeast.
As a result, our anchors are seismically tested frequently on a very wide array of racks and enclosures.
Because U.S. standards and specifications for seismic testing only recognize a maximum anchor size
up to 12 mm, any anchors above that size (i.e. 16 mm) are not eligible for qualification testing. However,
the larger anchors (16 mm) do provide an alternative for heavy load installations such as battery racks
in non-seismic locations. For seismic zones excellent results have been reported for battery racks and
seismic qualification testing using (8) to (12) M12 anchors per unit.
