Zoro Select
Zoro Select 1RRK7 Square Head Plug 1/2 in MNPT 304 Stainless Steel Class 3000
Seals 1/2 in MNPT threaded outlets with a 304 stainless steel square head plug rated to 3000 psi at 100°F
- 304 stainless steel resists corrosion in harsh environments
- Square head design allows secure wrench grip for easy installation
- Class 3000 rating handles 3000 psi at 100°F for high-pressure systems
- 1/2 inch MNPT threads connect directly to standard pipe fittings
- Meets ASTM A182 and ASME B16.11 standards for industrial reliability
Industrial Square Head Plug
The Zoro Select 1RRK7 is a 1/2 in MNPT plug made from 304 stainless steel for sealing threaded pipe outlets and fittings. It carries a Class 3000 pressure rating and meets ASTM A182, ANSI/ASME B1.20.1, and ASME B16.11 standards. The square head provides a flat wrenching surface for installation and removal. Maximum service pressure is 3000 psi at 100°F.
Suits Threaded NPT Systems
This plug fits builders and maintenance teams sealing 1/2 inch male NPT connections in hydraulic, steam, or general piping service up to 3000 psi. It is not for buyers who need a plug with pre-applied thread sealant or an integrated sealing gasket. It also does not suit applications requiring a hex head profile or a different nominal pipe size.
3000 psi Class 3000 Rating
The Class 3000 designation confirms the fitting withstands 3000 psi at 100°F and 2500 psi steam pressure at 350°F. This single pressure-class figure decides whether the plug matches the system design pressure. Verify the rating against your piping specification before ordering.
Highlights
- 304 stainless steel resists corrosion in harsh environments
- Square head design allows secure wrench grip for easy installation
- Class 3000 rating handles 3000 psi at 100°F for high-pressure systems
- 1/2 inch MNPT threads connect directly to standard pipe fittings
- Meets ASTM A182 and ASME B16.11 standards for industrial reliability
Specifications
| Brand | ZORO SELECT |
|---|
Questions about this item
What size MNPT fitting does the 1/2 in square head plug thread into?
It threads into a 1/2 in female NPT port that follows ANSI/ASME B1.20.1 dimensions.
Will the Class 3000 rating of this plug match the pressure class of my existing 3000 lb forged fittings?
Yes, the plug is rated to ASME B16.11 Class 3000, so it aligns with the same pressure class as 3000 lb forged couplings and outlets.
How can I verify the plug is holding pressure after I install it?
Pressurise the system up to 3000 psi at 100 °F or 2500 psi steam at 350 °F and check for leaks at the threaded joint.
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