# Aluminum Standoff: 1/2" Length, 4-40 Thread, F-F (4-Pack)

**Type:** Product page · **SKU:** POLOLU-2091 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/aluminum-standoff-1-2-length-4-40-thread-f-f-4-pack.html ([markdown](https://core-electronics.com.au/aluminum-standoff-1-2-length-4-40-thread-f-f-4-pack.html.md))

These 1/2"-long hexagonal female-female aluminum standoffs keep parts spaced 0.5 inches (13 mm) apart. They are like elongated, 3/16″-wide hex nuts, with 4-40 threads running through the entire length of each standoff. They are sold in packs of 4.

## Pricing

- **Price:** $7.20 (inc GST) — $6.55 AUD, exc GST
- **Quantity discounts:** 10+ $6.28 (exc GST) · 25+ $6.09 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 31 and Sep 02.

## Description

| [![](https://core-electronics.com.au/attachments/localcontent/0J3697_13425616ad6.jpg)](https://core-electronics.com.au/attachments/localcontent/0J3697_111249e7540.jpg) |
|---|

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. 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:

| Body Length | Thread |  | Body Length | Thread |
|---|---|---|---|---|
| 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) |  | 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) |
| 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) |  | 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) |
| 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) |  | 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) |
| 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) |  |  |  |
| 1.0" | [\#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) |  |  |  |
| 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) |  |  |  |
| 1.5" | [\#2-56](https://core-electronics.com.au/aluminum-standoff-1-1-2-length-2-56-thread-m-f-4-pack.html) | – |  |  |  |

Pololu carries 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://core-electronics.com.au/attachments/localcontent/0J2958_3987815d6b.jpg)](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: 1/2" Length, 4-40 Thread, M-F (4-Pack)](https://core-electronics.com.au/attachments/localcontent/0J2792_2571b6e263.jpg)](https://core-electronics.com.au/aluminum-standoff-1-2-length-4-40-thread-m-f-4-pack.html) | [Aluminum Standoff: 1/2" Length, 4-40 Thread, M-F (4-Pack)](https://core-electronics.com.au/aluminum-standoff-1-2-length-4-40-thread-m-f-4-pack.html) |
|---|---|

| [![Aluminum Standoff: 1" Length, 4-40 Thread, M-F (4-Pack)](https://core-electronics.com.au/attachments/localcontent/0J2794_3558c181bd.jpg)](https://core-electronics.com.au/aluminum-standoff-1-length-4-40-thread-m-f-4-pack.html) | [Aluminum Standoff: 1" Length, 4-40 Thread, M-F (4-Pack)](https://core-electronics.com.au/aluminum-standoff-1-length-4-40-thread-m-f-4-pack.html) |
|---|---|

**Dimensions**

| Length: | 0.5 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_1_2_inch_length_4_40_thread_f_f__4_pack___pololu_2091__00.jpg)