2UA51 – 1/2 in FNPT 304 Stainless Steel Coupling, Class 3000, Female-Female
2UA51 – 1/2 in FNPT 304 Stainless Steel Coupling, Class 3000, Female-Female
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Commercial Ordering FAQ
How do I verify that 2UA51 – 1/2 in FNPT 304 Stainless Steel Coupling, Class 3000, Female-Female is the correct replacement part for my equipment?
Check the OEM part number (2UA51) against your equipment nameplate or the manufacturer's repair parts list before ordering. If you are not sure, call the National Boiler Supply order desk at 850-565-3492 and we can cross-reference your equipment model and serial numbers before the order ships.
What are the shipping and freight options for Generic orders?
Standard parcel orders ship quickly from commercial distribution centers. Shipping is a $35 flat rate on orders under $999, and qualifying orders of $999 or more ship free by ground. Heavy equipment that has to move by LTL freight is quoted after the order is placed and confirmed with you before dispatch.
Can contractors or facility managers request a formal quote or use a Purchase Order (PO)?
Yes. National Boiler Supply works with commercial contractors, mechanical engineers, municipalities, and facility teams. Call 850-565-3492 for a formal quote, bulk pricing, or PO and tax-exempt order processing.
What if this Generic part is marked Call to Order or needed for an emergency repair?
Call our order desk at 850-565-3492. We can confirm factory lead times right away and arrange expedited air or hot-shot delivery when a repair cannot wait.
The 2UA51 Fitting is available from National Boiler Supply. We support purchasing teams with fast dispatch, formal quotes, and a live order desk at 850-565-3492.
Product Overview
Made from 304 stainless steel, this coupling is rated for a maximum internal pressure of 3000 psi at 100°F and a maximum steam pressure of 2500 psi at 350°F. It features FNPT connections on both ends; 1/2 inch nominal size; 14 threads per inch; conforms to ASME B16.11. The coupling's Class 3000 rating defines its pressure classification per industry standards.
Features
- Material: 304 Stainless Steel
- Style: Coupling with female threaded connections on Side A and Side B
- Connection Type: FNPT (Female National Pipe Thread)
- Pipe Size: 1/2 inch nominal size on both ends
- Thread Size: 14 threads per inch on both connections
- Pressure Rating: Class 3000; maximum 3000 psi at 100°F internal pressure
- Maximum Steam Pressure: 2500 psi at 350°F
- Standards: Material conforms to ASTM A182; threads conform to ANSI/ASME B1.20.1; meets ASME B16.11
Technical Specifications
| Manufacturer Part Number | 2UA51 |
|---|
OEM Part Verification: Confirm part number 2UA51 against your equipment nameplate or parts list before ordering. Our order desk can cross-check it for you.
Order Desk Support: Call 850-565-3492 for formal quotes, lead times, and volume pricing.
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
Apply for Trade Account & Terms →📋 Procurement & Shipping Notice
- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.