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 eV Parts® Vacuum Components:  PART NUMBERING SYSTEM and ABBREVIATIONS

 XX-YY-WZZZ/ZZZ

XX = MATERIAL

YY = PART CLASS

W = SIZE, SERIES B or SERIES C

ZZZ = SPECIAL DIMENSIONS

Al2O Alumina (99% Purity, Vitreous)
Cu      Copper
(OFHC)
HTG    High Temperature Glass
Mo      Molybdenum
SS      Stainless Steel 
(Normally 304)
Ta      Tantalum
(High Purity)
W       Tungsten
(High Purity)
BA    Ball
BR    Bracket
CPA
  Clamping Plate Assy
CS    Compression Spring
CY    Cylinder
EC    Element Clamp
IP      Insulator Protector
KG    Knitted Grid
(Temporarily Unavailable)

LR     Lock Ring
MN    Machine Nut
MS    Machine Screw
PL     Plate
RO    Rod
RP    Round Plate
SC    Screw Clamp
SCA
  Screw Clamp Assy
SH    Sheet
SP    Spacer
TN    Triple Nut
TR     Threaded Rod
TU     Tubing
WI     Wire
WN    Wirenut
WR    Wire Ring
WW   Wound Wire
XT     Split Tubing

 SERIES B - 1/16" series
 SERIES C - 1/8" series
  B C B C

DIMENSION

 in millimeters  in inches
Material Thickness 0.317 0.635 0.012 0.025
Mounting Hole Diameter     1.5875  3.175 0.0625 0.125
Mounting Hole Spacing 3.810 7.620 0.150 0.300
Hole Center to Edge     1.270 2.540 0.050 0.100
Alumina Tubing Diameter  1.549 3.150 0.062 0.124

Conventions Vary With Part Class, See Drawings



 

Example (see top left drawing below): SS-PL-C7X7-S1400   is a Stainless Steel Plate of the C series (thicker and larger);
   for plates, 7X7 is 7 holes by 7 holes and S1400 is a Square hole with 1.400inch sides.

Representative eV Parts®  showing part numbers and dimensions
For more complete information, see 
Drawings & Technical Notes page for a list of eV Parts drawings (PDFs)

Most parts come in either of two basic size categories: B series (1/16" scale, based on the hole size in plates) and C series (1/8" scale). 
The C series parts are generally larger and thicker, but the hole spacing and other dimensions of Series B and C parts are designed to be compatible.

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