4307000454 – 3/8 in Hex Head Plug, 304 Stainless Steel, MNPT, Class 3000, 11/16 in Hex Size
4307000454 – 3/8 in Hex Head Plug, 304 Stainless Steel, MNPT, Class 3000, 11/16 in Hex Size
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Commercial Ordering FAQ
How do I verify that 4307000454 – 3/8 in Hex Head Plug, 304 Stainless Steel, MNPT, Class 3000, 11/16 in Hex Size is the correct replacement part for my equipment?
Check the OEM part number (4307000454) 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.
National Boiler Supply supplies the 4307000454 3/8 in Hex Head Plug to contractors, facility teams, and purchasing departments. Get fast dispatch, contractor-ready quotes, and order desk support at 850-565-3492.
Product Overview
It features a six-sided hex head that allows tightening or removal using a wrench, rated to withstand up to 2,570 psi at 100°F and up to 1,965 psi steam at 350°F per the product's pressure ratings. This plug has a 3/8 inch nominal pipe size and is constructed from 304 stainless steel, which provides corrosion resistance and temperature tolerance within the material specifications.
Features
- Material: 304 stainless steel for corrosion and temperature resistance.
- Connection Type: Male National Pipe Thread (MNPT) for threaded pipe fittings.
- Nominal Pipe Size: 3/8 inch.
- Pressure Rating: Class 3000, with a maximum pressure of 2,570 psi at 100°F and a maximum steam pressure of 1,965 psi at 350°F.
- Hex Size: 11/16 inch across flats for wrench engagement (3/8 inch hex drive).
- Overall Length: 13/16 inch with an outside diameter of 11/16 inch.
- Standards: Threads meet ASME B1.20.1 NPT, materials conform to ASTM A182, and dimensions comply with ASME B16.11.
- Does not include pre-applied thread sealant or sealing components.
Technical Specifications
| Manufacturer Part Number | 4307000454 |
|---|
OEM Part Verification: Confirm part number 4307000454 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.