“Stay Connected with Heyco”
Venting Solutions
Heyco Threaded Vent Plugs
®
Open vent holes only
THREAD
Type/Size
PART NO.
Black
Gray
DESCRIPTION
PART DIMENSIONS
A
B
Wrenching Flats
Overall Length
in.
mm.
in.
mm.
NPT
NPT 1/4
NPT 3/8
NPT 1/2
NPT 3/4
3551B
3552B
3553B
3554B
3551
3552
3553
3554
TVP NPT 1/4
TVP NPT 3/8
TVP NPT 1/2
TVP NPT 3/4
.63
.83
.98
1.29
16,0
21,0
24,9
32,8
.66
.69
.81
.86
16,8
17,5
20,6
21,8
PG -
for PG Thread specifications, see page 3-49
Pg 7
Pg 9
Pg 13.5
Pg 21
3566B
3567B
3568B
3569B
3566
3567
3568
3569
TVP Pg 7
TVP Pg 9
TVP Pg 13.5
TVP Pg 21
.63
.83
.98
1.29
16,0
21,0
24,9
32,8
.53
.62
.76
13,5
15,8
19,3
Metric
M12
M16
M20
3557B
3558B
3559B
3557
3558
3559
TVP M12
TVP M16
TVP M20
.63
.83
.98
16,0
21,0
24,9
.53
.62
13,5
15,8
Standard color Black. Consult Heyco for other colors.
•
Permit the passage of air for
ventilation and heat dissipation.
•
Quick and easy installation into
Threaded Holes.
•
For multiple thread sizes and types.
•
All sizes and types feature seven (7)
.094˝ (2,4 mm) diameter vent holes.
•
Threaded plugs for hydraulic and
pneumatic applications.
•
Lower cost option over brass or
steel plugs.
•
Non-corrosive-resist salt water, weak
acids, gasoline, alcohol, oil, grease
and common solvents. Resist oil and
heat up to 221°F (105°C).
•
Approximate Head Thickness:
.21˝ (5,3 mm). Thickness may vary.
•
Hex shaped head for wrench
installation.
•
Electrically non-conductive Nylon 6/6.
•
For
Liquid Tight
Threaded Vent Plugs,
see page 5-5.
A
B
Material
Flammability Rating
Temperature Range
Nylon 6/6 bodies with UL (f1) rating
94V-2
-40°F (-40°C) to 221°F (105°C)
Quick
Specs
5-4
1-800-526-4182 • 732-286-1800 (NJ) • FAX: 732-244-8843 • www.heyco.com
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