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better ideas for the real world.

34 Malco Products Inc. Est. 1950

Dampers

Hardware / Components

Malco 28 Gauge Dampers feature 1/4” (6.4 mm) bearings allowing bearing holes to be made in round duct with the use of a

scratch awl. Squeeze pipe so that it is oval shaped. Insert damper into pre-punched bearing hole(s). Pipe will spring back to round

when released. Secure with wing nut(s) provided. Damper may be adjusted with screwdriver or optional damper handle. Available

with or without handles. See below.

D8HT100 D5100D7HT100 D6HT100

D6NA D4AST

D6100

CAUTION: Malco Dampers are designed for forced air systems, they

are not capable of being used in wood, coal, or other similar systems.

• Fast installing hammer-on design.

• For use on 30-24 gauge (0.41-0.71 mm) galvanized steel.

• Standard 5/16” (8 mm) threads. / Packaged 12 sets per bag.

• Note: Not for stove pipe: Use only for air handling applications

where temperature does not exceed 350°F (176°C).

Single Bearing / Spring Loaded:

1-spring bearing / 1-inside washer / 1-handle / 1-wing nut

Double Bearing :

2-spring bearing / 1-inside washer / 1-handle / 1-wing nut

Double Bearing :

1-spring bearing / 1-ﬁxed tip / 1-inside washer / 1-handle /

1-wing nut

Catalog Pipe Diameter

Number in. (mm) Bearing

Standard Dampers, including Wingnuts (Unassembled) 28 Gauge (0.48 mm) 100 packs

D5100 5 (127) single

D6100 6 (152) single

D6HT100 6 (152) double

D7HT100 7 (178) double

D8HT100 8 (203) double

Standard Dampers, including Wingnuts (Pre-assembled) 28 Gauge (0.48 mm) 100 packs

D4AST 4 (102) single

D5AST 5 (127) single

D6AST 6 (152) single

D7AST 7 (178) single

D8AST 8 (203) single

D6HTAST 6 (152) double

D7HTAST 7 (178) double

D8HTAST 8 (203) double

Standard Damper, Handles & Wingnuts (Unassembled) 28 Gauge (0.48 mm) 100 packs

D6NA 6 (152) single

Speciﬁcations

Bulk Components

(100 pack) Wing Nuts

H1100

(1000 piece carton) Inside Washer

DRW

(100 pack) Damper Handles

WN100

(1000 piece carton)

Head/Tail Piece, Fixed

(5/16” threads)

DT516

Damper

Regulator Hardware

DR69 DR70 DR71