5/8 in. Captive Sleeve Nut
5/8 in. Captive Sleeve Nut
Overview
The Midland 26008 is a 5/8 in. brass captive sleeve nut for compression tube fittings. The captive design holds the sleeve in the nut so it cannot be lost during assembly, speeding installation on metering pump and instrumentation lines. It carries a 0.87 in. hex for a standard wrench and a 0.51 in. body length.
Technical Specifications
| Manufacturer Part Number | 26008 |
| Connection Size | 5/8 in. Compression |
| Fitting Type | Captive Sleeve Nut |
| Hex Size | 0.87 in. |
| Length | 0.51 in. |
| Pressure Rating | 150 psi |
| Temperature Rating | -65°F to 250°F |
Materials of Construction
| Body | Brass |
| Sleeve | Brass (captive) |
Typical Applications
Used to compress and seal 5/8 in. tube onto compression fitting bodies in instrumentation, fuel, air, and light fluid-handling lines. The captive sleeve is convenient for field service on chemical feed and metering systems where dropped sleeves are easy to lose.
Cross-Reference and Interchange
This captive sleeve nut cross-references to these competitor and industry part numbers: 61X10, 61CA-10, 61CS-10, 61-CM-10, 961A-10, CS61-H. 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
- NPT Thread Tightening: Turns Past Hand Tight
- Teflon Tape vs. Pipe Dope
- Brass Fitting Types and Sizes Guide
FAQ
What does captive sleeve mean?
The brass compression sleeve is retained inside the nut, so it stays in place during assembly and will not drop out and get lost.
What hex size does the 26008 use?
It has a 0.87 in. hex across the flats for a standard open-end or socket wrench.
What is the pressure rating?
The 26008 is rated to 150 psi over a temperature range of -65°F to 250°F.
Does it fit any 5/8 in. compression body?
It is designed for Midland 5/8 in. captive-sleeve compression bodies; confirm thread and sleeve style when mixing brands.
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.