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Recommended Drill Hole Charts

These charts were developed to help installers determine the proper drill hole sizes for all end and intermediate posts. We still recommend that you always call us to confirm your proper holes sizes and answer any questions prior to starting your project.

How To Use The Charts:

  1. Examine the drawings below to find your desired fitting combination.
  2. Search the corresponding chart for the assembly combination that has the exact part numbers
    you need.
  3. From that line you can read the drill hole sizes for end posts (A & C) and intermediate posts (B).

Important - Please Read:

    Only the most commonly used combinations of fittings are shown. If you do not see the exact part numbers for your desired pairing of fittings, please call us to confirm the proper hole sizes.

    If CableCrimp™ Hand Crimp fittings are being used, it is assumed that they will be crimped on to the cable after the cable has been laced through all of the intermediate posts. If you prefer to attach the fittings prior to lacing the cables, then please call us to confirm proper drill hole sizes.

    Drill hole sizes do not take into consideration the possible use of Rubber Grommets or Protector Sleeves. If you are using either of these items, please call us to confirm proper drill sizes.

    If you have an assembly with an In-Line Turnbuckle, please contact us to confirm proper drill sizes.


The Charts




ASSEMBLY #1


#1
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Quick-Connect® SS 3146 3/8" 1/4" 5/16" 3191 1/8" Threaded Terminal
3/16"Quick-Connect® SS 3147 9/16" 1/4" 3/8" 3253 3/16" Threaded Terminal
1/4"Quick-Connect® SS 3148 9/16" 5/16" 7/16" 5050 1/4" Threaded Terminal
*If desired, Quick-Connect® SS posts (A) may be through-drilled with a 5/16" diameter bit and then
counter-bored to the depth of the fitting using the corresponding recommended drill hole size noted in the chart above.



ASSEMBLY #2


#2
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Threaded Terminal 3191 M 5/16" 5/16" 5/16" 3191 M 1/8" Threaded Terminal
3193 M 5/16" 5/16" 5/16" 3193 M
3260 C 5/16" 3/16" 5/16" 3260 C
3251 C 5/16" 3/16" 5/16" 3251 C
 
3/16" Threaded Terminal 3253 M 3/8" 3/8" 3/8" 3253 M 3/16" Threaded Terminal
3256 M 3/8" 3/8" 3/8" 3256 M
3263 C 3/8" 1/4" 3/8" 3263 C
3264 C 3/8" 1/4" 3/8" 3264 C
 
1/4" Threaded Terminal 5050 M 7/16" 7/16" 7/16" 5050 M 1/4" Threaded Terminal




ASSEMBLY #3


#3
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Internal
Thread Adjuster
3266 M 5/16" 5/16" 5/16" 3266 M 1/8" Internal
ThreadAdjuster
3/16" Internal
Thread Adjuster
3267 M 3/8" 3/8" 3/8" 3267 M 3/16" Internal
Thread Adjuster




ASSEMBLY #4


#4
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Fixed Cap End 3315 M 5/16" 5/16" 5/16" 3325 M 1/8" Cap End Turnbuckle
3318 C 5/16" 3/16" 5/16" 3328 C
 
3/16" Fixed Cap End 3316 M 3/8" 3/8" 5/16" 3326 M 3/16" Cap End turnbuckle
3319 C 3/8" 1/4" 5/16" 3329 C
 
1/4" Fixed Cap End 3317 M 7/16" 7/16" 3/8" 3327 M 1/4" Cap End Turnbuckle




ASSEMBLY #5


#5
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Cap End Turnbuckle 3325 M 5/16" 5/16" 5/16" 3325 M 1/8" Cap End Turnbuckle
3328 C 5/16" 3/16" 5/16" 3328 C
 
3/16" Cap End Turnbuckle 3326 M 5/16" 3/8" 5/16" 3326 M 3/16" Cap End Turnbuckle
3329 C 5/16" 1/4" 5/16" 3329 C
 
1/4" Cap End Turnbuckle 3327 M 3/8" 7/16" 3/8" 3327 M 1/4" Cap End Turnbuckle




ASSEMBLY #6


#6
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Fixed Cap End 3315 M 5/16" 5/16" 5/16" 3300 M 1/8" Sleekline Cap End Turnbuckle
3318 C 5/16" 3/16" 5/16" 3305 C
 
3/16" Fixed Cap End 3316 M 3/8" 3/8" 5/16" 3302 M 3/16" Sleekline Cap End Turnbuckle
3319 C 3/8" 1/4" 5/16" 3282 C


ASSEMBLY #7


#7
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Sleekline Cap End
Turnbuckle
3300 M 5/16" *9/16" see note 5/16" 3300 M 1/8" Sleekline Cap End
Turnbuckle
3305 C 5/16" 3/16" 5/16" 3305 C
 
3/16" Sleekline Cap End Turnbuckle 3302 M 5/16" *9/16" see note 5/16" 3302 M 3/16" Sleekline Cap End
Turnbuckle
3282 C 5/16" 1/4" 5/16" 3282 C
*Using machine swage M style of fittings on both ends requires a very large drill hole for the intermediate posts. Recommend using either a combination of M & C or type C & C instead.


ASSEMBLY #8


#8
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Fixed Ball End 3352 M 5/16" 5/16" 5/16" 3340 M 1/8" Ball End Turnbuckle
3355 C 5/16" 3/16" 5/16" 3343 C
 
3/16" Fixed Ball End 3353M 3/8" 3/8" 5/16" 3341 M 3/16" Ball End Turnbuckle
3256 C 3/8" 1/4" 5/16" 3344 C
 
1/4" Fixed Ball End 3354 M 7/16" 7/16" 3/8" 3342 M 1/4" Ball End Turnbuckle


ASSEMBLY #9


#9
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Ball End Turnbuckle 3340 M 5/16" 5/16" 5/16" 3340 M 1/8" Ball End Turnbuckle
3343 C 5/16" 3/16" 5/16" 3343 C
 
3/16" Ball End Turnbuckle 3341M 5/16" 3/8" 5/16" 3341 M 3/16" Ball End Turnbuckle
3344 C 5/16" 1/4" 5/16" 3344 C
 
1/4" Ball End Turnbuckle 3342 M 3/8" 7/16" 3/8" 3342 M 1/4" Ball End Turnbuckle


ASSEMBLY #10


#10
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Fixed Ball End 3352 M 5/16" 5/16" 5/16" 3345 M 1/8" Sleekline Ball End Turnbuckle
3355 C 5/16" 3/16" 5/16" 3350 C
 
3/16" Fixed Ball End 3353 M 3/8" 3/8" 5/16" 3346 M 3/16" SleeklineBall End Turnbuckle
3356 C 3/8" 1/4" 5/16" 3351 C


ASSEMBLY #11


#11
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ DrillØ DrillØ Part# Fitting
1/8" Sleekline Ball End Turnbuckle 3345 M 5/16" *9/16" see note 5/16" 3345 M 1/8" Sleekline Ball End Turnbuckle
3350 C 5/16" 3/16" 5/16" 3350 C
 
3/16" Sleekline Ball End Turnbuckle 3346 M 5/16" *9/16" see note 5/16" 3346 M 3/16" Sleekline Ball End Turnbuckle
3351 C 5/16" 1/4" 5/16" 3351 C
*Using machine swage M style of fittings on both ends requires a very large drill hole for the intermediate posts. Recommend using either a combination of M & C or type C & C instead.


ASSEMBLY #12


#12
End Post A Intermediate Posts B End Post C
Fitting Part # *PinØ DrillØ *PinØ Part# Fitting
1/8" Fixed Jaw End 3288 M 5/16" 5/16" 5/16" 3270 M 1/8" Jaw Turnbuckle
3279 C 5/16" 3/16" 5/16" 3268 C
 
3/16" Fixed Jaw End 3331 M 5/16" 3/8" 5/16" 3271 M 3/16" Jaw Turnbuckle
3280 C 5/16" 1/4" 5/16" 3269 C
 
1/4" Fixed Jaw End 3336 M 3/8" 7/16" 3/8" 3332 M 1/4" Jaw Turnbuckle
*Before drilling pin hole through bar or tab, make sure there is adequate clearance, especially if jaw end terminates at an angle.



ASSEMBLY #13


#13
End Post A Intermediate Posts B End Post C
Fitting Part # *PinØ DrillØ *PinØ Part# Fitting
1/8" Jaw Turnbuckle 3270 M 5/16" 5/16" 5/16" 3270 M 1/8" Jaw Turnbuckle
3268 C 5/16" 3/16" 5/16" 3268 C
 
3/16" Jaw Turnbuckle 3271 M 5/16" 3/8" 5/16" 3271 M 3/16" Jaw Turnbuckle
3269 C 5/16" 1/4" 5/16" 3269 C
 
1/4" Jaw Turnbuckle 3332 M 3/8" 7/16" 3/8" 3332 M 1/4" Jaw Turnbuckle
*Before drilling pin hole through bar or tab, make sure there is adequate clearance, especially if jaw end terminates at an angle.



ASSEMBLY #14


#14
End Post A Intermediate Posts B End Post C
Fitting Part # *PinØ DrillØ *PinØ Part# Fitting
1/8" Fixed Jaw End 3288 M 5/16" **9/16" see note 5/16" 3295 M 1/8" Sleekline Jaw Turnbuckle
3279 C 5/16" 3/16" 5/16" 3297 C
 
3/16" Fixed Jaw End 3331 M 5/16" **9/16" see note 5/16" 3296 M 3/16" Sleekline Jaw Turnbuckle
3280 C 5/16" 1/4" 5/16" 3299 C
*Before drilling pin hole through bar or tab, make sure there is adequate clearance, especially if jaw end terminates at an angle.
**Using machine swage M style of fittings on both ends requires a very large drill for the intermediate posts. Recommend using either a combination of M & C or type C & C instead.




ASSEMBLY #15


#15
End Post A Intermediate Posts B End Post C
Fitting Part # *PinØ DrillØ *PinØ Part# Fitting
1/8" Sleekline Jaw Turnbuckle 3295 M 5/16" **9/16" see note 5/16" 3295 M 1/8" Sleekline Jaw Turnbuckle
3297 C 5/16" 3/16" 5/16" 3297 C
 
3/16" Sleekline Jaw Turnbuckle 3296 M 5/16" **9/16" see note 5/16" 3296 M 3/16" Sleekline Jaw Turnbuckle
3299 C 5/16" 1/4" 5/16" 3299 C
*Before drilling pin hole through bar or tab, make sure there is adequate clearance, especially if jaw end terminates at an angle.
**Using machine swage M style of fittings on both ends requires a very large drill for the intermediate posts. Recommend using either a combination of M & C or type C & C instead.



ASSEMBLY #16


#16
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ Part# Fitting
1/8" Fixed Surface Mount 3281 M 5/16" 3278 M 1/8" Surface Mount Turnbuckle
3333 C 3/16" 3275 C
 
3/16" Fixed Surface Mount 3284 M 3/8" 3277 M 3/16" Surface Mount Turnbuckle
3334 C 1/4" 3276 C
 
1/4" Fixed Surface Mount 3337 M 7/16" 3338 M 1/4" Surface Mount Turnbuckle
*Surface mounted fittings are normally mounted with lag screws (#3183) or bolts (#3322) sold separately. Metal posts may be tapped to accommodate the bolt threads.



ASSEMBLY #17


#17
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ Part# Fitting
1/8" Surface Mount Turnbuckle 3278 M 5/16" 3278 M 1/8" Surface Mount Turnbuckle
3275 C 3/16" 3275 C
 
3/16" Surface Mount Turnbuckle 3277 M 3/8" 3277 M 3/16" Surface Mount Turnbuckle
3276 C 1/4" 3276 C
 
1/4" Surface Mount Turnbuckle 3338 M 7/16" 3338 M 1/4" Surface Mount Turnbuckle
*Surface mounted turnbuckles are normally mounted with lag screws (#3183) or bolts (#3322) sold separately. Metal posts may be tapped to accommodate the bolt threads.



ASSEMBLY #18


#18
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ Part# Fitting
1/8" Fixed Surface Mount 3281 M **9/16" see note 3309 M 1/8" Sleekline Surface Mount Turnbuckle
3333 C 3/16" 3311 C
 
3/16" Fixed Surface Mount 3284 M **9/16" see note 3310 M 3/16" Sleekline Surface Mount Turnbuckle
3334 C 1/4" 3312 C
*Surface mounted turnbuckles are normally mounted with lag screws (#3183) or bolts (#3322) sold separately. Metal posts may be tapped to accommodate the bolt threads.
*Using machine swage M style of fittings on both ends requires a very large drill for the intermediate posts. Recommend using either a combination of M & C or type C & C instead.




ASSEMBLY #19


#19
End Post A Intermediate Posts B End Post C
Fitting Part # DrillØ Part# Fitting
1/8" Sleekline Surface Mount Turnbuckle 3309 M **9/16" see note 3309 M 1/8" Sleekline Surface Mount Turnbuckle
3311 C 3/16" 3311 C
 
3/16" Sleekline Surface Mount Turnbuckle 3310 M **9/16" see note 3310 M 3/16" Sleekline Surface Mount Turnbuckle
3312 C 1/4" 3312 C
*Surface mounted turnbuckles are normally mounted with lag screws (#3183) or bolts (#3322) sold separately. Metal posts may be tapped to accommodate the bolt threads.
*Using machine swage M style of fittings on both ends requires a very large drill for the intermediate posts. Recommend using either a combination of M & C or type C & C instead.

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