Lead Gages   Thread Lead Print This Data Sheet LG-5002 Print Operation Manual LG-5003 Print Operation Manual  How To Order Select the LG-5002 or LG-5003 gage model. Select the proper contact points for the application, based on the type of connection and pitch/TPI (sold separately and individually). Select the lead gage setting standard, based on the type of connection, taper and threads per inch (sold separately). The lead gage inspects both internal and external thread lead using contact points that seat in the threads of the part. Thread lead is the distance between threads, measured on a plane parallel to the threaded part. The pitch of the thread determines the diameter of the contact points required for taking measurements. The LG-5002 uses a two-point system to inspect thread lead for ACME, Stub ACME, UN or API threads. The two points allow for a sweeping action to obtain the measurement. The LG-5003 uses the three point system to inspect thread lead for ACME, Stub ACME, UN or API threads. Two fixed points at the rear of the gage and one movable contact point at the front of the gage, provide complete stability when taking thread lead measurements. This unique design does not require sweeping to obtain measurements. Plus, contact points can be easily changed to allow the gage to be used on a variety of thread forms. Before inspecting parts, the lead gage must be preset to a nominal predetermined dimension using a lead gage setting standard. These setting standards are manufactured according to ANSI and API specifications. Lead standards are available for ACME, Stub ACME, UN and API threads. Feature - Uses a three-point system for greater stability when inspecting parts (LG-5003). - Uses interchangeable contact points to allow inspection on a variety of thread forms. - Requires presetting using Gagemaker's lead gage setting standards. LG-5002 & LG-5003 Gage Model No. Description Range LG-5002 Two-Point Lead Gage 1/2"-4" Thread Leads LG-5003 Three-Point Lead Gage 1/2"-4" Thread Leads LG-5002 & LG-5003 Lead Gage Contact Points (Sold Individually) Two contact points per LG-5002 & three contact points per LG-5003 ACME or Stub ACME Threads Model No. Chrome/Carbide Thread Pitch T531T 1 pitch T344T 1.5 pitch T266T 2 pitch T219T 2.5 pitch T188T/T188TC 3 pitch T144T/T144TC 3.5 pitch T128T/T128TC 4 pitch T105T/T105TC 5 pitch T090T/T090TC 6, 7 pitch T062T/T062TC 8 pitch T050T/T050TC 10 pitch T041T/T041TC 12 pitch T041T/T041TC 14 pitch T032T/T032TC 16 pitch UN Series Threads Model No. Chrome/Carbide Thread Pitch T562 1 pitch T288 2 pitch T188/T188C 3 pitch T188/T188C 3.5 pitch T144/T144C 4 pitch T128/T128C 4.5 pitch T115/T115C 5 pitch T105/T105C 5.5 pitch T090/T090C 6 pitch T072/T072C 8 pitch T057/T057C 10 pitch T050/T050C 11.5 pitch T050/T050C 12 pitch T041/T041C 14 pitch T041/T041C 16 pitch T032/T032C 18 pitch API Threads Model No. Connection Type Point Diameter Threads Per Inch T235 Hughes Slim Line H-90 0.235" 3 T200 All Hughes H-90 0.200" 3 1/2 T144 API Rotary Shouldered Connections 0.144" 4 T128 API Rotary Shouldered Connections 0.128" 4 1/2 T115 API Rotary Shouldered Connections 0.115" 5 T105T Truncated for Extreme Line 0.105" 5 1/2 T096 API Rotary Shouldered Connections 0.096" 6 T072 API Tubing, Casing and Line Pipe 0.072" 8 T062 Buttress Casing - Lead 0.062" 5 T057 API Tubing and Line Pipe 0.057" 10 T050 API Line Pipe 0.050" 11 1/2 T041 API Line Pipe 0.041" 14 T032 API Line Pipe 0.032" 18 T021 API Line Pipe 0.021" 27 LG-5002 & LG-5003 Lead Gage Setting Standards Model No. Connection Type Taper Threads per Inch LS-1001 8 & 10 Round Tubing / Casing 3/4" 8 & 10 LS-1002 8 & 10 V Form Tubing (Straight) 0 8 & 10 LS-1003 Line Pipe Tubing / Casing 3/4" 11 1/2 LS-1004 Line Pipe (Straight) 0 11 1/2 LS-1005 13 3/8" & Smaller Buttress Casing 3/4" 5 LS-1006 16" & Larger Buttress Casing 1" 5 LS-1007 6 5/8" API Reg 4", 5 1/2"-6 5/8" FH 2 3/8"-5 1/2" IF 2 7/8"-5" XH NC56-NC50 2" 4 LS-1008 5 1/2" Reg 7 5/8"-8 5/8" Reg NC56-NC77 3" 4 LS-1009 2 3/8"-4 1/2" Reg 2 7/8"-3 1/2", 4 1/2" FH 3" 5 LS-1010 2 3/8" Open Hole 1 1/2" 4 LS-1011 3 1/2"-6 5/8" H-90 2" 3 1/2 LS-1012 7"-8 5/8" H-90 3" 3 1/2 LS-1013 2 3/8"-3 1/2" Slim line H-90 1 1/4" 3 Specifications Model No. Dimensions Weight  LG-5002 5 7/8 in x 2 in x .875 in (149.2 mm x 50.8 mm x 22.2 mm) 1.0 lb (.45 kg)  LG-5003 7 in x 2 in x 2 in (177.8 mm x 50.8 mm x 50.8 mm) 1.0 lb (.45 kg)  Lead Standards 4.5 in x .75 in x .375 in (114.3 mm x 19.05 mm x 9.53 mm) .5 lb (.22 kg)