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#4-40 Male-Female Hex Standoff Spacer Jackscrew Brass Nickel-Plated for PCB Motherboard VGA DVI COM 5mm+L
#4-40 Male-Female Hex Standoff Spacer Jackscrew Brass Nickel-Plated for PCB Motherboard VGA DVI COM 5mm+L
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#4-40 Male-Female Hex Standoff Spacer Jackscrew — Brass Nickel-Plated for PCB, Motherboard, VGA, DVI & COM
The #4-40 UNC male-female hex standoff spacer (jackscrew) is the standard fastener for securing D-sub connector backshells (VGA, DVI, COM, LPT) to PC motherboards, expansion cards, and panel brackets. Brass construction with nickel plating provides excellent conductivity for EMI shielding and corrosion resistance for long-term reliability in electronics assemblies.
Key Specifications
| Parameter | Value |
|---|---|
| Thread Standard | UNC #4-40 |
| Material | Brass |
| Finish | Nickel-plated |
| Type | Male-female hex standoff (jackscrew) |
| Length | 5mm + L (per variant) |
| Drive | Hex (spanner / pliers) |
| Application | D-sub connector, PCB, motherboard, VGA, DVI, COM, LPT |
Why Choose #4-40 Brass Hex Standoffs?
- #4-40 UNC standard — universal thread for D-sub connector jackscrews (VGA HD-15, DVI-D, DB9 COM, DB25 LPT, DE15)
- Brass + nickel plating — excellent electrical conductivity for EMI/RFI shielding; corrosion-resistant for long-term reliability
- Male-female configuration — male thread on one end, female thread on the other; stacks and extends for custom panel depths
- Hex body — tighten with a spanner, pliers, or hex driver for secure, rattle-free connector retention
- Multiple lengths — 5mm base + variable length to suit different panel thicknesses and connector depths
Typical Applications
- VGA (HD-15) connector jackscrew retention on graphics cards and monitors
- DVI-D / DVI-I connector jackscrew on GPU and display adapters
- DB9 COM / RS-232 serial port connector retention on motherboards and expansion cards
- DB25 LPT parallel port connector retention
- PCB-to-panel standoff spacing in electronics enclosures
- Custom bracket and panel assembly requiring #4-40 UNC thread
Compatible With
- D-sub connector backshells: VGA HD-15, DVI-D, DVI-I, DB9, DB25, DE15
- PC motherboard I/O panel and expansion card bracket mounting
- Standard #4-40 UNC threaded holes in PC cases and brackets
- Spanner wrench, needle-nose pliers, or 4-40 hex driver for installation
Package Contents
- #4-40 male-female hex standoff spacers in selected length and quantity (per variant)
Frequently Asked Questions
- Q: What connectors use #4-40 jackscrews?
- A: All D-sub connectors use #4-40 UNC jackscrews: VGA (HD-15), DVI-D, DVI-I, DB9 (COM/RS-232), DB25 (LPT/parallel), and DE15. The #4-40 thread is the universal standard for D-sub connector retention worldwide.
- Q: What is the difference between a jackscrew and a standoff?
- A: A jackscrew is a male-female threaded fastener used to retain D-sub connector backshells — the male end threads into the connector housing and the female end accepts the mating screw from the other connector. A standoff spaces two PCBs or panels apart. This product functions as both.
- Q: Can I use these for PCB mounting?
- A: Yes. The male-female configuration allows these standoffs to be used for PCB-to-panel spacing where #4-40 UNC thread is specified. They are commonly used in industrial electronics and test equipment enclosures.
