1/4" Hex Female Standoffs
1/4 hex female standoffs are compact threaded spacers with tapped bores on both ends and a hexagonal body for wrench installation, providing a precise 1/4" separation between PCBs, chassis surfaces, and panels. The female-female thread configuration makes these standoffs the standard choice for single-board mounting where a board fastens to a surface at a controlled, fixed height. The 1/4" body length is one of the most common standoff sizes in PCB assemblies.
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What Are Hex Female Standoffs?
Hex female standoffs, also called female-female standoffs, accept screws at both ends without a pass-through male post. A screw from below secures the board to the standoff, and a second screw from above attaches the next panel or component. This makes them well-suited for mounting a single PCB to a chassis floor or spacing two panels at a fixed, secure gap.Male-female standoffs add a threaded post on one end for sequential board stacking. Unthreaded round spacers are a simpler alternative when a bolt or screw passes through the body to control height without threading into the spacer itself.
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Key Features
- Hexagonal body with flat-to-flat wrench engagement for reliable tool-driven installation
- Female-female thread configuration for board-to-surface and panel-to-panel mounting
- Available in nylon, aluminum, brass, and stainless steel
- Nylon option provides electrical insulation in sensitive PCB and electronic assemblies
- Precision tapped bores maintain consistent 1/4" spacing under assembly load
- Hex geometry prevents rotation during installation in confined enclosures
- Compatible with standard inch threading
Applications
1/4" hex female standoffs are used in a broad range of PCB and panel assembly applications:- PCB mounting to enclosure floors and chassis standoff posts
- Board-to-board stacking in automation, control systems, and instrumentation
- Panel spacing in power supplies and industrial enclosures
- RF shield mounting and panel separation
- Prototyping setups and R&D breadboard assemblies
Selection Guidance
- Standoff vs. Spacer: Female standoffs are threaded at both ends; use them where secure, independent thread engagement is needed at each mounting point. Unthreaded round spacers work well where a single fastener passes through the full height gap.
- Measuring Spacing: Body length equals the standoff's spacing contribution. Add PCB thickness and fastener head height when calculating total stack height.
- Material Selection: Nylon works well for insulating standoffs in PCB layouts. For high-cycle or structural applications, brass and stainless steel provide better thread retention. Aluminum is a lighter metal option for weight-sensitive assemblies.
- Hex vs. Round Body: Hex profiles allow tool-driven installation and resist rotation during tightening. Round standoffs are lower-profile and suit accessible, hand-tightened configurations where cross-body clearance is at a premium.
