New How Der (Taiwan) 3-Pole Closed Barrier Terminal Blocks, 9.5 MM Pitch (or also 3/8" probably), Tin Plated Brass Terminals, Rated at 15A / 250V, Through Hole PCB, Part Number HB-952 (we think), Customer Number M810-07-03-01W.  Each bid quantity is for a Lot of Five (5) Pieces.  You may bid / buy any number of lots, up to the total quantity available above.

These were purchased at an industrial liquidation earlier this year, and they were brand new in the original factory bags.  We packaged them in heavy Ziplok bags for resale.  The part number M810-07-03-01W on the bags doesn't Google anything meaningful.  There is a number laser etched into each block, which is HB-95S.  How Der does not make a P/N HB-95S, but they do make a HB-952 which matches these perfectly.  Since these were made where Chinese is the official language, we figure their linguistically dyslexic typesetter got his 2's and S's mixed up.  We see that more than you'd think in this line of work.

Technically, these are 9.5 Millimeter pitch.   However, since 9.5MM (.374") is only .001" difference from 3/8" (.375"), and since these are only three position, you can probably use them interchangeably for most applications.

According to the calipers:

Overall length:  1.184" / 30.09 MM

Pitch / Pin Spacing:  .374" / 9.50 MM

Height:  .593" / 15.07 MM

Depth:  .709" / 18.00 MM

Pin length:  .207" / 5.25 MM

Pin width:  .047" / 1.20 MM