4381004620 – 1-1/2 in Stainless Steel Weld Neck Flange, Class 300, Raised Face, Schedule 40
4381004620 – 1-1/2 in Stainless Steel Weld Neck Flange, Class 300, Raised Face, Schedule 40
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Commercial Ordering FAQ
How do I verify that 4381004620 – 1-1/2 in Stainless Steel Weld Neck Flange, Class 300, Raised Face, Schedule 40 is the correct replacement part for my equipment?
Check the OEM part number (4381004620) 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 4381004620 Fitting 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 long, tapered hub intended for butt-welding to a pipe, creating a smooth flow path and a strong, radiused weld joint. Made from 304/304L stainless steel, it offers corrosion resistance and strength suitable for demanding environments. The flange has a bolt circle diameter of 3 7/8 inches, bolt holes of 5/8 inches, and a flange outside diameter of approximately 6 1/16 inches. It is rated for operation at pressures up to 720 psi; steam pressure limit of 300 psi, and conforms to standards ASTM-SA182 and ANSI B16.5. The flange is specifically designed as a weld neck type with a flange thickness of 3/4 inches, and a total length of 2 11/16 inches.
Features
- Made of Forged 304/304L Stainless Steel for durability and corrosion resistance.
- Class 300 pressure rating indicating suitability for high-pressure service.
- Welded connection type for a secure, permanent joint to piping systems.
- Bolt circle diameter of 3 7/8 inches with 4 bolt holes, each 5/8 inches in diameter.
- Flange outside diameter of 6 1/16 inches and flange thickness of 3/4 inches.
- Nominal pipe size of 1 1/2 inches, compatible with standard piping dimensions.
- Overall length of approximately 2 11/16 inches and outside diameter at connection end of 6-1/8 inches.
- Standards: ASTM-SA182 and ANSI B16.5 for compliance with industry specifications.
Technical Specifications
| Manufacturer Part Number | 4381004620 |
|---|
OEM Part Verification: Confirm part number 4381004620 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.