/ Precision Measuring Tools / Precision Hand Tools / Hole Gages / Small Hole Gages / 831D * Not actual product image 53086 831D Small Hole Gage 53086 Other similar products The Starrett 831 Small Hole Gage is exactly the same as the 829 Series except that the gaging surface is a half-ball with a flat bottom. This permits use in even the most shallow holes, slots, and recesses. .400-.500" (10.2-12.7mm) Range, 3 1/2" (90mm) Length recesses. Features Specifications Parts Contact Starrett Features Ideal for accurately measuring small holes, slots, grooves, and recesses Precision Ground Radius on each gage provides two-point contact for maximum accuracy Used for general work Permits use in shallow holes, slots, and recesses Well balanced More accurate measurements Hardened-ball measuring surface with two-point contact Half-ball with a flat bottom Smooth, sensitive adjustment Adjustment of the gage beyond their range is restricted by a safety stop that prevents breakage Specifications Range (in): .400-.500" Range (mm): 10.2-12.7mm Length (in): 3-1/2" Length (mm): 90mm Parts Member of Kit Item #DescriptionPart No.QtyInformation 10BALL END #831D08868-01 20ROD, ADJUSTING08879-01 30NUT, #1-64 ADJ. ROD18290-01 40RING, RETAINING, .116X.166X.02518292-01 50HANDLE08872-01