# Aluminum Standoff: 3/8" Length, 4-40 Thread, F-F (4-Pack)

**Type:** Product page · **SKU:** POLOLU-2090 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/aluminum-standoff-3-8-length-4-40-thread-f-f-4-pack.html ([markdown](https://core-electronics.com.au/aluminum-standoff-3-8-length-4-40-thread-f-f-4-pack.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

| [![](https://a.pololu-files.com/picture/0J3697.250.jpg?65a028eb17e5491e530a5fd365a8b4b2)](https://a.pololu-files.com/picture/0J3697.1200.jpg?65a028eb17e5491e530a5fd365a8b4b2) |
|---|

These F-F (female-female) aluminum standoffs are great for separating stacked components or chassis tiers and can be used as an alternative to Pololu's [nylon spacers](https://core-electronics.com.au/hardware/spacers-standoffs.html). Each hexagonal standoff is 3/16" wide and has threading running through the entire length, similar to an elongated hex nut. A variety of lengths are available with either 2-56 or 4-40 threading:

Alternatives available with variations in these parameter(s): [length thread type Select variant… ](https://core-electronics.com.au/catalog/select-by-specification?parameters=0J76%2C0J109&product=2090&products=2080)

Longer standoffs can be made by stacking multiple F-F standoffs on a single screw.

[M-F (male-female) standoffs](https://core-electronics.com.au/hardware/spacers-standoffs.html) are also available, and can be screwed together or combined with F-F versions to make longer standoffs:

 | BodyLength | Thread | Price per4-pack |  | BodyLength | Thread | Price per4-pack |
|---|---|---|---|---|---|---|
| 0.25" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-1-4-length-2-56-thread-m-f-4-pack.html) | [\#4-40](https://core-electronics.com.au/aluminum-standoff-1-4-length-4-40-thread-m-f-4-pack.html) | $1.75 |  | 11 mm | [M2.5, 4mm](https://core-electronics.com.au/aluminum-standoff-for-raspberry-pi-11mm-length-4mm-m2-5-thread-m-f-4-pack.html) | $1.95 |
| 0.375" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-3-8-length-2-56-thread-m-f-4-pack.html) | [\#4-40](https://core-electronics.com.au/aluminum-standoff-3-8-length-4-40-thread-m-f-4-pack.html) | $1.75 |  | 11 mm | [M2.5, 6mm](https://core-electronics.com.au/aluminum-standoff-for-raspberry-pi-11mm-length-6mm-m2-5-thread-m-f-4-pack.html) | $1.95 |
| 0.5" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-1-2-length-2-56-thread-m-f-4-pack.html) | [\#4-40](https://core-electronics.com.au/aluminum-standoff-1-2-length-4-40-thread-m-f-4-pack.html) | $1.75 |  | 18.6 mm | [M2.5, 6mm](https://core-electronics.com.au/aluminum-standoff-for-raspberry-pi-18-6mm-length-6mm-m2-5-thread-m-f-4-pack.html) | $2.25 |
| 0.75" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-3-4-length-2-56-thread-m-f-4-pack.html) | [\#4-40](https://core-electronics.com.au/aluminum-standoff-3-4-length-4-40-thread-m-f-4-pack.html) | $1.95 |  |  |  |  |
| 1.0" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-1-length-2-56-thread-m-f-4-pack.html) | [\#4-40](https://core-electronics.com.au/aluminum-standoff-1-length-4-40-thread-m-f-4-pack.html) | $2.25 |  |  |  |  |
| 1.25" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-1-1-4-length-2-56-thread-m-f-4-pack.html) | [\#4-40](https://core-electronics.com.au/aluminum-standoff-1-1-4-length-4-40-thread-m-f-4-pack.html) | $2.95 |  |  |  |  |
| 1.5" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-1-1-2-length-2-56-thread-m-f-4-pack.html) | – | $3.15 |  |  |  |  |

Pololu carry a variety of 2-56 and 4-40 [screws and hex nuts](https://core-electronics.com.au/hardware/screws-nuts.html) that can be used with these standoffs.

**People often buy this product together with:**

 | [![Machine Hex Nut: #4-40 (25-pack)](https://a.pololu-files.com/picture/0J2958.100.jpg?c8ec9aa6fe7fbb56955f9ffa731072fa)](https://core-electronics.com.au/machine-hex-nut-4-40-25-pack.html) | [Machine Hex Nut: #4-40 (25-pack)](https://core-electronics.com.au/machine-hex-nut-4-40-25-pack.html) |
|---|---|

 | [![Aluminum Standoff: 3/8" Length, 4-40 Thread, M-F (4-Pack)](https://a.pololu-files.com/picture/0J2791.100.jpg?fb294e361988de15487d9c01e0d73f44)](https://core-electronics.com.au/aluminum-standoff-3-8-length-4-40-thread-m-f-4-pack.html) | [Aluminum Standoff: 3/8" Length, 4-40 Thread, M-F (4-Pack)](https://core-electronics.com.au/aluminum-standoff-3-8-length-4-40-thread-m-f-4-pack.html) |
|---|---|

 | [![Machine Screw: #4-40, 1/4](https://a.pololu-files.com/picture/0J2956.100.jpg?bccbd065670bd1b3982b8b343a36bd3e)](https://core-electronics.com.au/machine-screw-4-40-1-4-length-phillips-25-pack.html) | [Machine Screw: #4-40, 1/4" Length, Phillips (25-pack)](https://core-electronics.com.au/machine-screw-4-40-1-4-length-phillips-25-pack.html) |
|---|---|

**Dimensions**

 | Length: | 0.375 in |
|---|---|

**General specifications**

 | Gender: | Female-Female |
|---|---|
| Thread type: | 4-40 |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/a/l/aluminum_standoff_3_8_inch_length_4_40_thread_f_f__4_pack___pololu_2090__00.jpg)