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Unified Fine Thread Gages

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Is the tapped hole correct?Accuracy of the finished thread when the insert is installed is dependant upon the accuracy of the tapped hole.If the finished tapped hole gages satisfactorily,the installed insert will be within the thread tolerance.

It is not necessary to gage the installed insert. After the insert is installed,the GO thread plug gage may not enter freely;however,the insert will always seat itself when the bolt or screw is installed and tightened. (Reference NASM33537).

Gage handles and all gage nibs are marked with the extreme product limits for the particular size and class of fit.(See p.20-21,Tables VII & VIII, pitch Diameter Limits.)

When gaging tapped holes which have been thoroughly cleaned or which have a protective finish applied, the gage should always be lubricated with light oil.
HI nib may enter provided a definite drag results on or before 3rd turn from entry- Ref. FED-STD-H28, Screw thread Standards for Federal Services.





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  Results 1 - 21 of 21 1 

Item #

Complete Working Gages Suggested For Longer Wear Life 3B

Complete Working Gages Suggested For Longer Wear Life 2B

Complete Reference Gages Suggested as Master Gages 3B

Complete Reference Gages Suggested As Master Gages 2B

Nominal Thread Size

2-643694-02 3694-02 1443-02 1694-02 1441-02 2 in (.086)-64
3-563694-03 3694-03 1443-03 1694-03 1441-03 3 in (.099)-56
4-483694-04 3694-04 1443-04 1694-04 1441-04 4 in (.112)-48
5-403694-06 3694-06 1443-06 1694-06 1441-06 5 in (.125)-40
6-403694-2 3694-2 1443-2 1694-2 1441-2 6 in (.138)-40
8-363694-3 3694-3 1443-3 1694-3 1441-3 8 in (.164)-36
10-323694-4 3694-4 1443-4 1694-4 1441-4 10 in (.190)-32
1/4-283694-5 3694-5 1443-5 1694-5 1441-5 1/4 in (.2500)-28
5/16-243694-6 3694-6 1443-6 1694-6 1441-6 5/16 in (.3125)-24
3/8-243694-7 3694-7 1443-7 1694-7 1441-7 3/8 in (.3750)-24
7/16-203694-8 3694-8 1443-8 1694-8 1441-8 7/16 in (.4375)-20
1/2-20 N/A N/A 1694-9 1441-9 1/2 in (.5000)-20
9/16-18 N/A N/A 1694-10 1441-10 9/16 in (.5625)-18
5/8-18 N/A N/A 1694-12 1441-12 5/8 in (.6250)-18
3/4-16 N/A N/A 1694-14 1441-14 3/4 in (.7500)-16
7/8-9 N/A N/A 1694-16 1441-16 7/8 in (.8750)-9
1-8 N/A N/A 1694-161 1441-161 1 in (1.000)-8
1-1/8-7 N/A N/A 1694-18 1441-18 1-1/8 in (1.1250)-7
1-1/4-7 N/A N/A 1694-20 1441-20 1-1/4 in (1.2500)-7
1-3/8-6 N/A N/A 1694-22 1441-22 1-3/8 in (1.3750)-6
1-1/2-6 N/A N/A 1694-24 1441-24 1-1/2 in (1.5000)-6
  Results 1 - 21 of 21 1