SPECIFICATIONS |
Thread Size |
M4X0.7 |
Coating |
No Finish |
Wire Insert Series |
Non-Locking |
Wire Insert Type |
Tanged |
Material |
Stainless Steel |
Material |
304 Stainless Steel |
Length Nominal Dia. |
1-1/2 Dia. |
Material Specification |
AS7245 |
Number of Free Coils |
6-1/8 |
Free Coil Diameter Min. |
5.05 mm |
Free Coil Diameter Max. |
5.60 mm |
Finish Specification |
n/a |
|
DRILLING DATA |
Minimum Drilling Depth for Bottoming Taps |
8.80 mm |
Minimum Drilling Depth for Plug Taps |
12.20 mm |
Drilling Information |
The 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 M8 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 M8 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 M10 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. |
4.70 mm |
Countersink Diameter Max. |
5.30 mm |
Pitch Diameter Min. |
4.46 mm |
Pitch Diameter Max. ~ Class of Fit 4H_mm |
4.51 mm |
Pitch Diameter Max. ~ Class of Fit 5H_mm |
4.53 mm |
Minimum Tapping Depth |
6.70 mm |
Tap Major Diameter Max. |
5.01 mm |
|
TAPS & GAGES |
Tap High Spiral Flute Bottoming 4H5H |
5081-4 |
Tap High Spiral Flute Bottoming 5H |
4681-4 |
Tap Spiral Point Plug 4H5H |
4863-4 |
Tap Spiral Point Plug 5H |
4763-4 |
Tap Straight Flute Bottoming 4H5H |
4693-4 |
Tap Straight Flute Bottoming 5H |
2093-4 |
Tap Straight Flute Plug 4H5H |
4687-4 |
Tap Straight Flute Plug 5H |
2087-4 |
Reference Gage 4H |
4624-4 |
Reference Gage 5H |
1324-4 |
|
REFERENCE |
Aerospace Standard Part Number |
MA3279-154 |