• Home
  • 3591-8CN1250 Tanged Locking Insert
Prop 65 warning

3591-8CN1250 Tanged Locking Insert

SKU: 04548 | MPN: 3591-8CN1250
/ Eaches
Quantity Available
Discount by: unit
1 - 49
50 - 99
100 - 499
500 - 999
1000 - 4999
5000 - 9999
10000 - 24999
25000 - 49999
50000 - 99999
100000 +


Thread Size1/2-20
CoatingNo Finish
Wire Insert SeriesLocking
Wire Insert TypeTanged
MaterialStainless Steel
Material304 Stainless Steel
Length Nominal Dia.2-1/2 Dia.
Material SpecificationAS7245
Number of Free Coils21-3/8
Free Coil Diameter Min..592 in
Free Coil Diameter Max..617 in
Finish SpecificationDyed Red for Identification
Finish AppearanceDyed Red
Locking Torque Data
Locking Torque Max.150 in·lb
Locking Torque Min. 15th Cycle18.0 in·lb
Drilling Data
Suggested Drill Size ~ Aluminum33/64
Suggested Drill Size ~ Steel, Magnesium, Plastic33/64
Minimum Drilling Depth for Bottoming Taps1.450 in
Minimum Drilling Depth for Plug Taps1.550 in
Drilling InformationThe minimum drilling depths shown below allow for the following recommended practices: 1. Countersinking the drilled hole to prevent a feather edge at the start of the tapped hole. 2. 3/4 - 1-1/2 pitch of insert ""set-down"" to allow for maximum production tolerance. Dimensions are shown for both plug and bottoming taps. (Note: Plug taps 5/16"" and smaller have a male center and the drilled hole depth dimensions allow for this length (one half of the diameter of the holt). Calculation of dimension ""F"" is as follows For Plug Taps 5/16"" and smaller: F = Insert Nominal Length (Q) + .5 (Bolt Nominal Diameter) + 4P (Tap Chamfer) + 1P (allowance for countersink and maximum insert set-down). For Plug Taps 3/8"" and larger: F = Insert Nominal Length(Q) + 4P (Tap Chamfer) + 1P (allowance for countersink and maximum insert set-down). For Bottoming Taps: F = Insert Nominal Length (Q) + 2P (Tap Chamfer) + 1P (allowance for countersink and maximum insert set-down).
Tapping Data
Countersink Diameter Min..560 in
Countersink Diameter Max..590 in
Pitch Diameter Min..532 in
Pitch Diameter Max. ~ Class of Fit 3B_in.536 in
Pitch Diameter Max. ~ Class of Fit 2B_in.537 in
Minimum Tapping Depth1.300 in
Tap Major Diameter Max..569 in
Taps & Gages
Tap High Spiral Flute Bottoming 2B6906-8
Tap High Spiral Flute Bottoming 3B5906-8
Tap Roughing8CRU
Tap Spiral Point Plug 2B8FSA
Tap Spiral Point Plug 3B8FSB
Tap Straight Flute Bottoming 2B8FBA
Tap Straight Flute Bottoming 3B8FBB
Tap Straight Flute Plug 2B8FPA
Tap Straight Flute Plug 3B8FPB
Reference Gage 2B1441-8
Reference Gage 3B1694-8
Working Gage 2B3694-8
Working Gage 3B1443-8