1/4 in. Captive Sleeve Nut
1/4 in. Captive Sleeve Nut
Sizes in This Series
Brass captive sleeve nuts for compression fittings. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/8 in. | 26001 | $1.68 | Add to cart |
| 1/4 in. (this page) | 26003 | $1.18 | — |
| 5/8 in. | 26008 | $4.37 | Add to cart |
Overview
The Midland 26003 is a brass captive sleeve nut for 1/4 in. OD compression fittings. The sleeve is held captive inside the nut so it stays aligned on the tube and cannot fall out during assembly. It threads onto 1/4 in. union bodies, adapters, elbows, and tees and is rated to 300 psi.
Technical Specifications
| Part Number | 26003 |
| Connection Size | 1/4 in. compression |
| Fitting Type | Captive Sleeve Nut |
| Hex Size | 1/2 in. |
| Length | 0.4 in. |
| Material | Brass |
| Pressure Rating | 300 psi |
| Temperature Rating | -65°F to 250°F |
Materials of Construction
| Nut | Brass |
| Captive Sleeve | Brass |
| For Use With | 1/4 in. OD copper, aluminum, and thermoplastic tubing |
Typical Applications
Used to complete or repair 1/4 in. brass compression joints on union bodies, adapters, elbows, and tees. The pre-assembled captive sleeve speeds field and production assembly and is common on water, fuel, oil, and compressed air lines as well as instrument tubing.
Cross-Reference and Interchange
This brass captive sleeve nut cross-references to these competitor and industry part numbers: 00261-04, 1761x4, 261X4, 5220K203, 611x4, 61A-4, 61CA-4, 61-CM-04, 61CS-4, 61x4, 961-1/4, 961-4, 961A-4. Replacing one of these? Match nominal size, connections, and rating, or send us your part number and we will confirm the interchange.
Sizing and Installation Resources
- Compression Fitting Sizing Chart
- Brass Fitting Types and Sizes Guide
- NPT Thread Tightening: Turns Past Hand-Tight
Frequently Asked Questions
What is a captive sleeve nut?
The brass sleeve is pre-assembled inside the nut, so it stays aligned on the tube and cannot be dropped or lost during assembly.
What does it thread onto?
1/4 in. brass compression union bodies, adapters, elbows, and tees.
What is the pressure rating?
300 psi over a -65°F to 250°F range.
WARNING: This product can expose you to chemicals including Lead, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.