Mill-Max Factory News from PSC Electronics


Mill-Max Introduces .050” (1,27 mm) Pitch Solder Cup Headers & Sockets

Mill-Max Mfg., Corp., North America’s largest manufacturer of Precision Machined interconnects is proud to present new, .050” (1,27 mm) pitch solder cup headers and sockets for termination of fine gauge wires and cables.  These solder cup connectors are ideal for applications that demand a highly reliable interconnect in a compact format.

Our high quality,  .050” (1,27 mm) pitch solder cup interconnects  are the choice for terminating cables and wires used in critical applications such as medical and industrial equipment.  The headers and sockets each feature closed cavity pins and receptacles providing isolation between the soldering and interconnect areas; keeping solder from contaminating the pin and socket connection.  The solder cups are uniformly aligned to facilitate efficient soldering, especially useful for terminating cables, and can accept up to 26 AWG stranded wire.

PR684The male headers have .016” (0,41 mm) diameter tails suitable for mating with all Mill-Max .050” (1,27 mm) pitch   SMT and through hole board mount sockets, perfect for making wire to board connections.  The socket receptacles are a two-piece construction with a precision-machinedouter shell and stamped beryllium copper internal contact designed for repeated mating while maintaining reliable contact over the life of the product. The insulator material is high performance Nylon 46 with excellent chemical resistance, mechanical strength and an HDT of 290° C to withstand most soldering processes.  The standard plating option is gold, providing interconnect reliability, corrosion protection and wear resistance.

Connectors are available in single and double row configurations:

Single row 1-50 positions:  850-10-0XX-10-003000  (Male Header) &  851-13-0XX-10-003000  (Female Socket)

Double row 2 -100 positions:  852-10-XXX-10-00300  (Male Header) &  853-13-XXX-10-00300  (Female Socket)

For more information use the links to the right for additional product details, to order a sample, to find related products, or contact  Mill-Max Technical Services  for custom design options.


Mill-Max Offers Swage Mount PCB Pins for Interconnect Applications

Oyster Bay, NY, June 13, 2017 – Mill-Max is adding to its diverse mix of swage mount PCB pins with six new offerings designed for interconnect applications.  These swage mount terminals are designed to be mechanically fastened to a board or panel and plugged into sockets or soldered into mating boards in board stacking and other interconnect configurations.

Swage pins are often thought of as wire-to-board soldering terminals and test points or as hardware such as PCB standoffs, but they are also an excellent choice for board-to-board interconnects.  They are cost effective due to their simple design, don’t require the more precise PCB hole specifications associated with most press-fit pins and can be processed in volume with semi-automatic or automatic equipment.  Swage assembly is a method of mechanically fastening pin terminals to a circuit board, similar in style to riveting.  After the pins are swaged, they are soldered, providing a robust mechanical and reliable electrical connection.

PR673The swage pins featured here are offered in various diameters and lengths to suit a wide variety of interconnect applications.  They are useful when space is limited, near the edge of a board for example, where a connector with its housing is not an option.   The swaged pin takes up relatively little space and is secure without the need of an insulator.  The longer pins are perfect for overcoming the height of taller board components (large capacitors, transformers, power supplies, potentiometers) to connect to a daughter card or other module, while the low profile 4658-0 may be used on boards which are primarily SMT, to keep the overall stacked board assembly height to a minimum .

All the pins are high speed precision turned from brass alloys and annealed to prevent cracking during the swaging operation.  The standard plating for these pins is matte tin over nickel with other plating options available upon request.


Part # Pin Dia. (in) Pin Length for Mating (in.) Suggested Mounting Hole Diameter (in) Maximum Board or Panel thickness (in)
4658-0-00-80-00-00-08-0 .040 .094 .043 .062
4275-0-00-80-00-00-08-0 .040 .235 .043 .075
9103-0-00-80-00-00-08-0 .040 .300 .043 .031
4639-0-00-80-00-00-08-0 .062 .432 .065 .062
4717-0-00-80-00-00-08-0 .062 .332 .065 .062
9242-0-00-80-00-00-08-0 .083 .375 .094 .075



Mill-Max Introduces 3 mm (.118”) Maximum Stroke Spring-Loaded Pin

Mill-Max Introduces 3 mm (.118”) Maximum Stroke Spring-Loaded Pin

Mill-Max is proud to announce a new addition to its spring-loaded pin selection with the introduction of the 0919-0-15-20-89-14-11-0.  This new offering has a maximum stroke of 3 mm (.118”) with an initial height of .379” (9,63 mm).  It is designed for SMT termination and can be used at a minimum spacing of .100” (2,54 mm).

The 0919 spring pin has a recommended working travel range of .030” (0,762 mm) to .100” (2,54 mm) and a maximum mechanical travel of .118” (3 mm), the greatest in our current spring pin lineup.  There is a hard stop incorporated to prevent over compression and minimize the risk of damage to the spring.  This pin is ideal for applications where greater compliancy is desired.  It can compensate for problematic tolerance stack ups in assemblies featuring board-to-board or device-to-board connections.  The 0919 allows a greater range of movement between mating components, providing stable connectivity in assemblies subject to motion, such as mobile devices and light weight devices that often use more flexible housings and materials.  When compressed to mid-stroke, it still allows for .040” (1,02 mm) additional travel while remaining in the recommended working range.  Because the 0919 has more stroke capability, it provides higher forces at its recommended working travel than similar spring pins of this scale.  This may be desirable to a designer seeking to sustain reliable contact during cycles of high shock and vibration.  The 0919 exhibits an average 85 gram force at mid-stroke with the ability to achieve 127 grams at the top of the recommended travel.

The 0919 is also available packaged in single and double row strips on .100” (2,54 mm) centers.  The single row series part number is 837-22-0XX-30-001101 (change last three digits to 191 for tape & reel packaging); the double row series part number is 839-22-0XX-30-001101 (change last three digits to 191 for tape & reel packaging).

Gold-plated brass components and stainless steel springs ensure the highest reliability, corrosion resistance and durability.  The spring-loaded plunger is suitable for mating with gold-plated PCB pads or Mill-Max target pins and connectors.

For more information, please visit: or view or data-sheet.


Mill-Max Introduces Five New Wire Termination Contacts

Mill-Max has expanded its selection of wire termination products with the addition of new wire crimp and solder cup receptacles.

The three new wire crimp receptacles can accommodate wires from 22-26 AWG and accept mating pins in the popular .025” (,63 mm) – .040” (1,02 mm) range.  The two solder cup receptacle additions provide solutions for solder terminations of disparate uses.  The 9177 is ideal for high current, rugged applications handling currents in the 15 amp range while the 4485 can be used on pin-to-pin spacing down to 2 mm.  Three of the five parts have inspection holes to accommodate wire viewing and to promote plating coverage inside the wire termination holes.  Please see Tables 1 & 2 below for details.

Table 1
Wire Crimp Receptacle P/N Wire Accommodation Mating Pin Range Ø Inspection Hole (Yes/No) Receptacle Current Rating (Amps) at 10º C Temp. Rise
6368-0-33-15-47-27-10-0 22-26 AWG .025″ – .037″ Yes 4.5
4130-0-33-15-34-27-10-0 22-26 AWG .032″ – .046″ Yes 8
8731-0-19-15-34-27-10-0 22-26 AWG .032″ – .046″ No 8


Table 2
Solder Cup Receptacle P/N Wire Accommodation Mating Pin Range Ø Inspection Hole (Yes/No) Receptacle Current Rating (Amps) at 10º C Temp. Rise
4485-0-51-15-21-27-10-0 22 AWG Max. .015″ – .022″ Yes 3
9177-0-18-80-07-27-10-0 16 AWG Max. .065″ – .082″ No 15

The receptacles are a two piece construction with a precision-machined outer shell and stamped beryllium copper internal contact.  Like all Mill-Max receptacles, they are capable of multiple insertion and extraction cycles while maintaining reliable contact over the life of the product.

Various shell and contact plating options are available.

Please visit for more information and to view Mill-Max’s complete line of wire crimp and solder cup receptacles.


Mill-Max Connections

Mill-Max Maximum Connections

The largest manufacturer of precision machined interconnect components in North America.

Here is the latest developments from Mill-Max Manufacturing Corporation:   Mill-Max New products Newsletter


Mill-Max Expands its Line of Solder Cup Spring-Loaded Pins

Mill-Max Expands its Line of Solder Cup Spring-Loaded Pins

Mill-Max is proud to announce a new addition to its spring-loaded pin selection with the introduction of the 0973-0-15-20-77-14-11-0.  This new offering has a solder cup designed to accept up to 20 AWG wire, has a maximum stroke of .080” (2,03 mm) and can be used at a minimum spacing of .100” (2,54 mm).

The shoulder and barb features are located and designed to allow easy and reliable assembly into connector housings. The terminating wires may be passed through a connector housing and soldered to the cup of the 0973.  Once the soldering is complete the wires can now draw the 0973 spring pins into the housing and the spring pins can be secured with the press-fit.  With the pins securely pressed into the housing, the shoulder acts as a stop, retaining the pins in the event the cable or wires are strained.   The shoulder will also prevent push out of the spring pin if the plunger end is over compressed.  These design features make the 0973 ideal for cable and bulkhead style connector assemblies.

The 0973 spring pin has a working travel of .040” (1,02 mm) and a maximum mechanical travel of .080” (2,03 mm).  There is a hard stop incorporated to prevent over compression and minimize the risk of damage to the spring.  The high retention force press-fit of the solder cup to the body of the spring pin insures the reliability of the component during soldering and assembly operations.

Gold-plated brass components and beryllium copper springs ensure the highest conductivity, corrosion resistance and durability.  The spring-loaded plunger is suitable for mating with gold- plated PCB pads or Mill-Max target pins and connectors.  For wire termination target pins consider Mill-Max 3024-0-01-15-00-00-03-0 and for connectors, see the single row 330-10-1XX-00-240000 and double row 430-10-2XX-00-240000.

For more information, please visit:


Fine Pitch Right Angle & Horizontal SMT Spring Loaded (Pogo) Connectors

Mill-Max is pleased to introduce new .050” (1,27 mm) pitch spring-loaded right angle and horizontal SMT connectors to its standard product lineup.  These new connectors offer space saving spring-loaded solutions for a variety of interconnect applications.

Both connector series are ideal for mating boards in a perpendicular orientation or for parallel, daisy chaining applications.  The centerline mating height is .0435” (1,1 mm) from the board surface with a total profile height of .087” (2,21 mm).  The fine pitch and low profile are desirable for dense packaging requirements while maintaining the durability and reliability expected of quality interconnect components.

The right angle, 854-22-0XX-20-001101, is a through-hole mount connector with .016” (0,41 mm) diameter solder tails suitable for board thickness up to .100” (2,54 mm).  The 854-22-0XX-40-001101 is a horizontal surface mount (HSMT) with .016” (0,41 mm) diameter termination leads held to a .005” (0,13 mm) co-planarity.  They each have a .0275” (0,7 mm) working travel (mid-stroke) and a maximum stroke capability of .055” +/-.005” (1,4 mm – 0,13 mm).

Each series is single row and has standard availability of 1 to 20 positions (higher pin counts available upon request).  These connector series are also available with mounting pegs on the insulator housing to provide additional strength and alignment.  To specify connectors with mounting pegs, modify the part numbers as follows: right angle series, 854-22-0XX-20-601101; horizontal SMT series, 854-22-0XX-40-601101. (See the attached datasheets for pad and hole layouts, as well as part number information).  These connectors, along with new right angle and HSMT target connectors, provide great versatility for diverse mating configurations.

These two new series also maintain the quality and reliability of current Mill-Max spring pin connectors by utilizing the same precision-machined external components and internal spring technology.  Gold-plated components and springs ensure the highest conductivity, corrosion resistance and durability. The spring-loaded pins used in these connectors have a current rating of 2 amps continuous use (3 amps maximum).  The high temperature plastic housing is suitable for all soldering processes and the connectors are RoHS compliant.

For more information use the links to the right for additional product details, to find related products, or contact Mill-Max Technical Services for additional questions.


MillMax – Target Connector Lineup Expanded with .050″ and .100″ Concave Face Right Angle, HSMT and More

Mill-Max is expanding its selection of target connectors in both our .100″ (2,54mm) and .050″ (1,27mm) grid families. Target connectors are used in place of SMT pads on a PCB as the mating surface for spring-loaded pins. The new series include right angle with concave mating face (.100″ grid), through-hole and surface mount with concave face (.050″ grid) and horizontal surface mount and right angle (.050″ grid) with both flat and concave face options available.

Combining target connectors with spring-loaded connectors on opposing boards can be a simple and convenient solution for making connections between stacked boards or docking stations and devices.

As a complement to our existing .100″ grid right angle target connectors, we are introducing two new series featuring targets with concave faces. The single row series is 399-10-1XX-10-007000 and the double row is 499-10-2XX-10-007000; both are for through-hole mounting.

In our .050″ grid lineup, we have added concave face versions of our SMT and through-hole target connectors: 856-10-0XX-10-002000 (single row, through-hole); 856-10-0XX-30-002000 (single row, SMT); 857-10-0XX-10-002000 (double row, through hole); 857-10-0XX-30-002000 (double row, SMT).

Concave face target connectors provide additional surface area for mating and can aid in centering/alignment of components and/or boards fitted with spring-loaded connectors.

Rounding out the lineup of new target connectors are right angle and horizontal surface mount (HSMT) versions on .050″ grid. These connectors provide low profile options for parallel or right angle board mating arrangements. The HSMT version is especially suited for daisy chaining applications such as those found in LED strip lighting assemblies. These connectors will be available with both flat and concave face options. The right angle series are 856-10-0XX-20-001000 (flat face) and 856-10-0XX-20-002000 (concave face); the HSMT series are 856-10-0XX-40-001000 (flat face) and 856-10-0XX-40-002000 (concave face).

All the pins are precision-machined and gold-plated for environmental protection, durability and reliable conductivity. The connector insulators are molded from high temperature plastic suitable for most soldering processes, including RoHS environments. All of these products are RoHS compliant.