diff --git a/js/common/view/GravityAndDampingControlNode.js b/js/common/view/GravityAndDampingControlNode.js
index 1c490850..d795b1a3 100644
--- a/js/common/view/GravityAndDampingControlNode.js
+++ b/js/common/view/GravityAndDampingControlNode.js
@@ -23,6 +23,7 @@ define( function( require ) {
   var NumberControl = require( 'SCENERY_PHET/NumberControl' );
   var PhetFont = require( 'SCENERY_PHET/PhetFont' );
   var StringUtils = require( 'PHETCOMMON/util/StringUtils' );
+  var SunConstants = require( 'SUN/SunConstants' );
   var Text = require( 'SCENERY/nodes/Text' );
   var Util = require( 'DOT/Util' );
   var Vector2 = require( 'DOT/Vector2' );
@@ -127,7 +128,7 @@ define( function( require ) {
           }
         } ),
         valuePattern: StringUtils.fillIn( gravityValueString, {
-          gravity: '{0}'
+          gravity: SunConstants.VALUE_NAMED_PLACEHOLDER
         } ),
         valueFont: new PhetFont( { size: 14 } ),
         useRichText: true,
diff --git a/js/common/view/MassValueControlPanel.js b/js/common/view/MassValueControlPanel.js
index e3b9fb7e..c5980e42 100644
--- a/js/common/view/MassValueControlPanel.js
+++ b/js/common/view/MassValueControlPanel.js
@@ -16,6 +16,7 @@ define( function( require ) {
   var MassesAndSpringsConstants = require( 'MASSES_AND_SPRINGS/common/MassesAndSpringsConstants' );
   var Node = require( 'SCENERY/nodes/Node' );
   var NumberControl = require( 'SCENERY_PHET/NumberControl' );
+  var SunConstants = require( 'SUN/SunConstants' );
   var Panel = require( 'SUN/Panel' );
   var PhetFont = require( 'SCENERY_PHET/PhetFont' );
   var Property = require( 'AXON/Property' );
@@ -64,7 +65,7 @@ define( function( require ) {
     } );
 
     var trackSizeProperty = new Property( options.basics ? new Dimension2( 132, 0.1 ) : new Dimension2( 125, 0.1 ) );
-    var valuePattern = StringUtils.fillIn( massValueString, { mass: '{0}' }, {
+    var valuePattern = StringUtils.fillIn( massValueString, { mass: SunConstants.VALUE_NAMED_PLACEHOLDER }, {
       font: new PhetFont( { size: 14, weight: 'bold' } )
     } );
     var numberControl = new NumberControl( massString, massInGramsProperty, range, {