# MILL-MAX OFP Sockets: Are They Pick-and-Place Compatible?

**URL:** <https://forum.digikey.com/t/mill-max-ofp-sockets-are-they-pick-and-place-compatible/11274>\
**Category:** Interconnect\
**Tags:** mill-max, interconnect, faqs, documentation, connectors-interconnects\
**Created:** [January 14, 2021, 4:48pm UTC](https://forum.digikey.com/t/mill-max-ofp-sockets-are-they-pick-and-place-compatible/11274 "2021-01-14T16:48:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Bill\_Gust](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/bill_gust/32/2334_2.png) [@Bill\_Gust](https://forum.digikey.com/u/Bill_Gust)\
**Post date:** [January 14, 2021, 4:48pm UTC](https://forum.digikey.com/t/mill-max-ofp-sockets-are-they-pick-and-place-compatible/11274/1 "2021-01-14T16:48:14Z")

</div>

Mill-Max offers receptacles and pass-through sockets that include an **Organic Fibre Plug® (OFP®)** barrier at one end. This feature, also known as a ‘ **knockout bottom** ’, prevents solder, flux, or paste from entering the receptacle cavity and contaminating the contact surface during PCB placement and soldering.

**Question:** Given that Mill-Max OFP® products are available in tape/reel packing, are they compatible with automated pick-and-place procedures?

**Answer:** Yes, the OFP® feature creates a barrier at the bottom end of the cylinder, and this allows a pick-and-place vacuum head to pick up the piece from the top end which faces outward on the tape packing.

 ![MillMaxSocket.PNG](https://global.discourse-cdn.com/digikey/original/2X/3/3930e1d8c93d5c0eb056674fb907380f2264ca80.jpeg)

Note the statement, “The OFP® barrier permits the sockets to be vacuum picked from the tape prior to placement in a hole in the circuit board.” on the following Mill-Max page regarding [SOLDER BARRIER PIN RECEPTACLES & SOCKETS WITH OFP® KNOCKOUT BOTTOM](https://www.mill-max.com/products/new/solder-barrier-pin-receptacles-sockets-with-organic-fibre-plug-knockout-bottom).

On the same page, there is an Application Note link to more details regarding the [Assembly Sequence for Intrusive Reflow Soldering for OFP® Receptacles](https://www.mill-max.com/sites/default/files/external/assets/2017-07/Application%20Note%20-%20Assembly%20Sequence%20for%20Intrusive%20Reflow%20Soldering%20for%20OFP%20Receptacles.pdf).

The two photos, below, show the basic sequence for using pick-and-place vacuum heads with Organic Fibre Plug® receptacles and sockets.

![MillMaxPickOFP.PNG](https://global.discourse-cdn.com/digikey/original/2X/f/f880e8aad0de97ac77446a5a48678adf429775a8.jpeg)

![MillMaxPlaceOFP.PNG](https://global.discourse-cdn.com/digikey/original/2X/0/0391d83e133903883dc6b29945f882077632c861.jpeg)

Searching for [Organic Fiber Plug](https://www.digikey.com/short/47qqqf) (rather than ‘Fibre’) gives the Mill-Max OFP results, and searching for [Knockout Bottom](https://www.digikey.com/short/47qqj5) includes a few other manufacturers along with the previous OFP products.

For many similar products, check out the [Terminals – PC Pin Receptacles, Socket Connectors](https://www.digikey.com/en/products/filter/terminals-pc-pin-receptacles-socket-connectors/324) category, or search from the [Digi-key Home Page](https://www.digikey.com/).

For direct retrieval of the previous Mill-Max application note, use this file: [Application Note - Assembly Sequence for Intrusive Reflow Soldering for OFP Receptacles.pdf](https://forum.digikey.com/uploads/short-url/hyFtLsakSfeKC3g87Plg9mRN9l.pdf) (733.5 KB)

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**Relevant Manufacturer Product Codes on the Digi-key Site** (at the post date of this article).

0479-0-67-80-34-27-10-0  
4280-0-67-80-16-27-10-0  
0337-0-67-80-15-27-10-0  
5280-0-67-80-16-27-40-0  
0321-0-67-80-08-27-10-0  
0375-0-67-80-02-27-10-0  
5359-0-67-80-10-27-10-0  
0332-0-67-80-18-27-10-0  
4428-0-43-15-04-14-10-0  
0353-0-67-80-03-27-10-0  
4015-0-67-80-30-27-10-0  
0577-0-67-80-21-27-10-0  
0384-0-67-80-23-27-10-0  
0321-0-43-80-08-27-10-0  
0479-0-43-80-34-27-10-0  
0376-0-67-80-07-27-10-0  
4280-0-43-80-16-27-10-0  
0379-0-43-80-34-27-10-0  
0384-0-43-80-23-27-10-0  
4428-0-67-15-04-14-10-0  
4015-0-43-80-30-27-10-0  
0577-0-43-80-21-27-10-0  
0353-0-43-80-03-27-10-0  
9873-0-67-80-02-27-10-0  
3435-0-43-80-47-27-04-0  
5359-0-43-80-10-27-10-0  
0375-0-43-80-02-27-10-0  
0332-0-43-80-18-27-10-0  
5280-0-43-80-16-27-40-0  
0337-0-43-80-15-27-10-0  
0376-0-43-80-07-27-10-0

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#OFP #OrganicFibrePlug #OrganicFiberPlug #Mill-Max #MillMax