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Stackable 0.100″ Female Header with Extra 0.3″ Spacer: 2x20-pin, Straight


$4.00 AUD, inc GST
$3.64 AUD, exc GST

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Stackable 0.100″ Female Header with Extra 0.3″ Spacer: 2x20-pin, Straight


$4.00 AUD, inc GST
$3.64 AUD, exc GST

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In stock, with a short lead time. 426 units dispatch in 4 to 9 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Tue, 30th of Jan with Express Post within Australia.
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This stackable 40-pin female header features two rows of 20 pins spaced with a standard 0.1″ (2.54 mm) pitch; this spacing is the same as on most solderless breadboards and matches 0.1″ male header strips. The extended pins allow multiple units to be stacked as popularized on Arduino shields, enabling removable daughter boards that can access pins without blocking them. The 2×20 size is notably used on the Raspberry Pi Model A+ and Model B+.

This header includes three 0.1″-thick spacers, which gives it the necessary height to clear everything all the components on the Raspberry Pi Model B+. The locations of these spacers can be adjusted if so desired to provide more clearance, or they can be removed to provide less clearance:

The spacers can be adjusted on the Stackable 0.100″ Female Header with Extra 0.3″ Spacer: 2×20-pin, Straight.

Pololu also carry a shorter 2×20 stackable female header (with no spacers) and a standard (non-stackable) 2×20 female header.


Dimensions (in mm) of straight stackable 0.100″ female headers with extra spacers.

The dimensions in the above diagram are: A = 48.3 mm, B = 51.3 mm, H = 16.1 mm, and P = 7.1 mm.

Documentation and Resources:

Product Comments

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
NSW, 2289

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.