THREAD	PART NO.		DESCRIPTION	PART DIMENSIONS				CAD
Type/Size	Black	Gray		A Wrenching Flats		B Overall Length
				in.	mm.	in.	mm.
NPT
NPT 1/4	3551B	3551	TVP NPT 1/4	.63	16,0	.66	16,8
NPT 3/8	3552B	3552	TVP NPT 3/8	.83	21,0	.69	17,5
NPT 1/2	3553B	3553	TVP NPT 1/2	.98	24,9	.81	20,6
NPT 3/4	3554B	3554	TVP NPT 3/4	1.29	32,8	.86	21,8
PG - PG Thread Specifications
Pg 7	3566B	3566	TVP Pg 7	.63	16,0	.53	13,5
Pg 9	3567B	3567	TVP Pg 9	.83	21,0
Pg 13.5	3568B	3568	TVP Pg 13.5	.98	24,9	.62	15,8
Pg 21	3569B	3569	TVP Pg 21	1.29	32,8	.76	19,3
Metric
M12	3557B	3557	TVP M12	.63	16,0	.53	13,5
M16	3558B	3558	TVP M16	.83	21,0
M20	3559B	3559	TVP M20	.98	24,9	.62	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 six (6) 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.
• View Liquid Tight Threaded Vent Plugs.

QuickSpecs