Dixon API Certified Permanently Attached Coupling
API Certified Permanently Attached Coupling from Dixon, in 4 sizes and with Buna Washer. 8 part numbers listed — supplied by Yash Enterprise, an authorized Dixon distributor in Mumbai.

Key features
- Thread: NPT
- Thread: NPSM
All part numbers (8)
Size, material and part number for every item in this range. Parts are supplied on request. We confirm availability and price within 24 hours.
| Part no. | Size | Material | Quote | |
|---|---|---|---|---|
| API Certified Permanently Attached Coupling — 520-H Series Female 4 | ||||
| H5241L-A-BU | 2 inch | with Buna Washer | ||
| H5251L-A-BU | 2½ inch | with Buna Washer | ||
| H5261L-A-BU | 3 inch | with Buna Washer | ||
| H5281L-A-BU | 4* inch | with Buna Washer | ||
| API Certified Permanently Attached Coupling — 520-H Series Male 4 | ||||
| H5242L-A | 2 inch | |||
| H5252L-A | 2½ inch | |||
| H5262L-A | 3 inch | |||
| H5282L-A | 4* inch | |||
Not sure which part you need? Send us the equipment and rating on WhatsApp and we will recommend the exact part.
No part numbers match those filters.
Common questions
Which sizes and materials does the Dixon API Certified Permanently Attached Coupling range come in?
This range has 8 part numbers in 4 sizes, in with Buna Washer. Every part number is listed in the table above — filter by size or material, or search by part number.
How do I order Dixon API Certified Permanently Attached Coupling?
Pick the part from the list, then request a quotation. There is no minimum order — single pieces and project quantities are quoted the same way, and we confirm availability and price within 24 hours.
Are these genuine Dixon products?
Yes. Yash Enterprise is an authorized Dixon distributor; every part is sourced through the principal brand, with the manufacturer's standard warranty passed through.


