U Type Nuts Retainers
Advantages
PSM U Type Nuts Retainers are spring steel fasteners combining the utility of a captive nut with the flexibility of a clip. They grip onto panel edges or into slots to provide a captive, threaded attachment point. Designed for ease of assembly, they eliminate the need for back-side access, welding, or extra hardware.
- High load bearing faces
- Enables high torque on machine screws
- Electro-plated finish not subject to embrittlement failure
- Removes need for expensive rivet bushes
MATERIAL
Carbon steel
WHEN SPECIFYING, PLEASE STATE:
- Quantity
- Prefix (CBUR)
- Part No.
- Finish code (e.g. 1000 CBUR-0170-13)
U Type Nuts Retainers Key Features
- Self-retaining: The U-nut holds itself in position, allowing quick assembly without tools.
- High strength and torque: Designed to handle higher tightening torques while resisting loosening due to vibration.
- Alignment flexibility: The captive nut allows slight lateral movement to accommodate misaligned holes.
- Full bearing surface: The lower leg provides a strong bearing area, offering better load distribution compared to J-type nuts.
- Blind and center-panel mounting: Can be used in blind locations or through slots where access to both sides is limited.
Method of Assembly
Exactly the same as conventional ‘U-Nut.
U Type Nuts Retainers Dimensions
| PART NO. | THREAD SIZE | A | B | C | H | PANEL RANGE |
|---|---|---|---|---|---|---|
| 0166 | M5 | 26.2 | 15.9 | 11.1 | 9.5 | 0.71 - 1.62 |
| 0168 | M6 | 26.2 | 15.9 | 11.1 | 9.5 | 0.71 - 1.62 |
| 0979 | M6 | 26.0 | 15.9 | 11.1 | 9.5 | 2.0 - 2.2 |
| 0170 | M8 | 31.8 | 17.5 | 15.1 | 12.7 | 0.71 - 1.62 |
Recommended Installation Torque
| SCREW SIZE |
lbs. ins | N.M. | SCREW SIZE |
lbs. ins | N.M. |
|---|---|---|---|---|---|
| 4 | 6 | 0.68 | 10 UNC | 11 | 1.24 |
| 6 | 12 | 1.35 | 10 UNF | 7 | 0.79 |
| 8 | 18 | 2.03 | 6 BA | 2 | 0.23 |
| 10 | 24 | 2.71 | 4 BA | 4 | 0.46 |
| 12 | 30 | 3.39 | 2 BA | 7 | 0.79 |
| 14 | 42 | 4.75 | 6 mm | 16 | 1.81 |
| 1/4 ACME | 50 | 5.65 | 4 mm | 6 | 0.69 |
| 5/16 ACME | 75 | 8.48 | 1/4 BSW | 20 | 2.26 |
| 2 BA | 7 | 0.79 | |||
| 3/16 BSW | 11 | 1.24 |
| CODE | DESCRIPTION | COLOUR | USAGE |
|---|---|---|---|
| 00 | Blue, oil dipped | Blue temper | Very light corrosive conditions |
| 09 | Phosphate, oil dipped | Dark grey | Light corrosive conditions |
| 13 | Chromate passivated electro plated zinc | Pale translucent yellow | Highly corrosive conditions |
| 08 | Phosphate & zinc chromate paint | Green | Highly corrosive conditions |
| 10 | Phosphate & zinc chromate paint | Black | Highly corrosive conditions |
| 11 | Plastic coating | Black | As required |
| 14 | Polyester | Various | As required |
| 22 | Polyseal | Black | Highly corrosive conditions |
| 24 | Dacromet | Silver | Highly corrosive conditions |
Design & Specification Guidelines
Panel and Slot Requirements
Panels should be within the recommended thickness range to ensure proper grip. Slots or holes must be clean and properly dimensioned so the spring legs can snap securely in place without damaging the fastener or the panel edge.
Material and Finish
U-Type Nut Retainers are commonly made from high-quality spring carbon steel for durability and resilience. Finishes such as zinc plating or passivation improve corrosion resistance and maintain smooth engagement between components.
Installation and Assembly
- Position the U-nut retainer over the panel edge or slot.
- Slide it on until the lower leg snaps into the hole or aligns over the screw position.
- Insert the screw and tighten to the recommended torque. The spring action prevents the nut from rotating during tightening.
Ensure that the fastener is properly aligned before applying torque and avoid twisting or overloading during installation.
Recommended Installation Torque
| SCREW SIZE | lbs. ins | N.M. | SCREW SIZE | lbs. ins | N.M. |
|---|---|---|---|---|---|
| 4 | 6 | 0.68 | 10 UNC | 11 | 1.24 |
| 6 | 12 | 1.35 | 10 UNF | 7 | 0.79 |
| 8 | 18 | 2.03 | 6 BA | 2 | 0.23 |
| 10 | 24 | 2.71 | 4 BA | 4 | 0.46 |
| 12 | 30 | 3.39 | 2 BA | 7 | 0.79 |
| 14 | 42 | 4.75 | 6 mm | 16 | 1.81 |
| 1/4 ACME | 50 | 5.65 | 4 mm | 6 | 0.69 |
| 5/16 ACME | 75 | 8.48 | 1/4 BSW | 20 | 2.26 |
| 2 BA | 7 | 0.79 | |||
| 3/16 BSW | 11 | 1.24 |
| CODE | DESCRIPTION | COLOUR | USAGE |
|---|---|---|---|
| 00 | Blue, oil dipped | Blue temper | Very light corrosive conditions |
| 09 | Phosphate, oil dipped | Dark grey | Light corrosive conditions |
| 13 | Chromate passivated electro plated zinc | Pale translucent yellow | Highly corrosive conditions |
| 08 | Phosphate & zinc chromate paint | Green | Highly corrosive conditions |
| 10 | Phosphate & zinc chromate paint | Black | Highly corrosive conditions |
| 11 | Plastic coating | Black | As required |
| 14 | Polyester | Various | As required |
| 22 | Polyseal | Black | Highly corrosive conditions |
| 24 | Dacromet | Silver | Highly corrosive conditions |
Enhance Your Assembly with Our U Type Nuts Retainers
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Frequently Asked Questions About U Type Nuts Retainers
What is a U Type Nut Retainer?
How do U Type Nut Retainers attach to a panel?
U Type Nut Retainers are installed by sliding its U-shaped spring-steel body over the edge of a panel, flange, or bracket. Spring tension in the clip secures the retainer — and the nut it holds — firmly in position, ready to accept a mating screw from the opposite side without further alignment or holding required.po