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Table 402. Dimension and Installation Data for Heavy Duty Keensert Thread Inserts (Cont)

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Table 403.  Dimension and Installation Data for Light Weight Keensert Thread Inserts
DIMENSIONS  INSTALLATION DATA  REMOVAL   DATA 
Non-Locking  Internal Thread Locking  Internal Thread Class 3B  External Thread  *L  *A  Tap Drill  Dia  C'Sink Dia   +.010   -.000  Thread Tap  Drill 
Size Class 2A  Shear Engag.  Size Class 2B  Min Depth  Installation Tool Part Number  Size  Depth 
X  10-32  5/16-18  .1517  .31  .272  .323  5/16-18  .37  TD 1032L  7/32  5-32 
X  .0945  .31 
X  10-24  .1517  TD 1024L 
X  .0945  .31 
X  1/4-28  3/8-16  .2371  .37  .332  .385  3/8-16  .43  TD 428L  9/32  3/16 
X  .1726  .33 
X  1/4-20  .2371  TD 420L 
X  .1726  .36 
X  5/16-24  7/16-14  .3049  .43  .397  .447  7/16-14  .50  TD 524L  11/32 
X  .2321  .34 
X  5/16-18  .3049  TD 518L 
X  .2321  .37 
X  3/8-24  1/2-13  .4299  .50  .453  .510  1/2-13  .56  TD 624L  13/32 
X  .3366  .36 
X  3/8-16  .4299  TD 616L 
X  .3366  .40 
X  7/16-20  9/16-12  .5665  .56  .516  .572  9/16-12  .62  TD 720L  15/32 
X  .4606  .41 
X  7/16-14  .5665  TD 714L 
X  .4606  .45 
X  1/2-20  5/8-11  .7175  .62  .578  .635  .68  TD 820L  17/32 
X  .5906  .42 
X  1/2-13  .7175  TD 813L 
X  .5906  .47
            L = Lenth of external threads   A= Maximum distance to then of thread lock.with internal thread size 5/16 and more are furnished with 4 locking Kees. STANDARD MATERIALS:  INSERT - 303 CRES (passivated)                        Kees - 302 CRES        Inserts 

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20-00-02/70-00-01

B.  Method No. 407B: Loose or Damaged Thread Inserts (Aluminum or Magnesium Parts) Replacement
Replace loose or damaged thread inserts in aluminum or magnesium-alloy parts as follows:
(1)  
Use long-nosed pliers (SECTION VII) to remove loose or damaged inserts.

WARNING: SOLVENT VAPORS ARE TOXIC AND FLAMMABLE.  DO NOT INHALE
VAPORS. OBSERVE FIRE PRECAUTIONS.

(2)  
Clean hole from which insert was removed, using solvent (Federal Specification P-D-680, Type 1) (SECTION VII) and remove corrosion if present.

NOTE:  Refer to applicable manual to verify type of primer required.

(3)  
Apply a thin, even coat of primer (Type I, Class C) (SECTION VII) to threaded area in which new insert is to be installed.

NOTE:  Use a modified screwdriver, or a rod, with the correct outside diameter to fit inside diameter of insert and slotted to fit over tang of insert, to install new insert.
　
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