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AIR INLET
3
/
4
NPT is standard. See the selection guide
on page 32 for location (type 5). A centered 2" NPT air
inlet is also available for some rolled plate parts. (Consult
Firestone).
BLIND NUT
1
/
2
-13 UNC thread x
3
/
4
" deep (four each
plate). Used for mounting the part. A stud adapter for this
size blind nut is not available.
UPPER BEAD PLATE (9 gauge carbon steel, .149").
Permanently crimped to bellows to form an airtight assem-
bly. Allows for leak testing before the unit leaves the
factory. Zinc/chromate plated for rust protection.
The convoluted parts, with 17, 20, and 22 inch diameter,
are shown with bead rings as standard. We have devel-
oped a method for permanently attaching plates to these
larger sized Airstrokes (called rolled plate assembly).
These parts may be an advantage over the bead ring
parts in some cases, because installation is much easier
(they attach the same way as the bead plate parts).
When installing the rolled plate parts, a backup plate as
large in diameter as the bead plate must be used. This
plate should be a minimum of
1
/
2
inch thick.
Again, for the blind nut and air entrance locations of rolled
plate parts (bead rings are shown as standard on the
data pages), please refer to the selection guide on page
32. The static data chart on each individual part may be
used for the rolled plate version; but, two modifications
must be made:
1. Increase the minimum height by .70 inch.
2. Add .70 inch to the height (bottom axis) before
reading loads.
9mm
END CLOSURE OPTIONS
LARGE PARTS WITH ROLLED PLATES
CLAMP RING This ring is crimped up under the bel-
lows bead to permanently attach the bead plate to the
bellows. It is also zinc/chromate plated for rust
protection.
LOWER BEAD PLATE Usually the same as upper
bead plate, except without air inlet. See the selection
guide on page 32 for diameter (type 5).
LARGE CONVOLUTED AIR SPRINGS
(#203 is shown, with rolled plates instead of bead rings)