4381038060 – 1-1/4 in FNPT 304 Stainless Steel Locknut, Class 150, 2-1/16 in Hex Size
4381038060 – 1-1/4 in FNPT 304 Stainless Steel Locknut, Class 150, 2-1/16 in Hex Size
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Commercial Ordering FAQ
How do I verify that 4381038060 – 1-1/4 in FNPT 304 Stainless Steel Locknut, Class 150, 2-1/16 in Hex Size is the correct replacement part for my equipment?
Check the OEM part number (4381038060) 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 4381038060 1-1/4 in FNPT 304 Stainless Steel Locknut 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
Constructed from 304 stainless steel, this locknut offers resistance to corrosion and includes a threaded FNPT connection compatible with 1 1/4 inch Class 150 pipe fittings. It is rated for use with air, natural gas, non-potable water, oil, and steam systems within specified pressure ranges, with a maximum operating pressure of 300 psi and a maximum steam pressure of 150 psi. The product conforms to ASTM-A-351 material standards, ANSI/ASME B1.20.1 thread specifications, and MSS-SP-114 Class 150 pressure rating.
Features
- Material: 304 stainless steel, providing corrosion resistance.
- Nominal Pipe Size: 1 1/4 in with FNPT connection type.
- Pressure Rating: Class 150 with a maximum operating pressure of 300 psi.
- Applicable for conveying air, natural gas, non-potable water, oil, and steam.
- Hex Size: 2 1/16 in for wrench engagement.
- Overall Length: 7/16 in and bolt hole center-to-center distance of 1 1/4 in.
- Standards Compliance: ASTM-A-351 material, ANSI/ASME B1.20.1 threads, MSS-SP-114 Class 150 pressure rating.
Technical Specifications
| Manufacturer Part Number | 4381038060 |
|---|
OEM Part Verification: Confirm part number 4381038060 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.