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Precision Twist Drill CO500-127/32, part number 5995799, 7/32" (0.2188") HSS-E Cobalt aircraft extension drill with bronze finish and 135° point. NAS907 standard, 2-1/2" flute length, 12" overall length, cylindrical shank, right-hand cut. For aerospace holemaking in steel, stainless steel, cast iron, and high-temperature alloys.
MODEL 5995799
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$24.23 Each
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Drill point 135°
Basic Standard
NAS907
Coating
Bronze
Connection (shank) description
Cylindrical shank
Cutting diameter - fractional inch (DC)
7/32"
Cutting diameter - inch (DC)
0.2188
Cutting diameter - millimeter (DC)
5.56
Drill Length
XL
Hand (Cutting direction)
Right
Length chip flute - fractional inch (LCF)
2.1/2
Length chip flute - inch (LCF)
2.5
Material
HSS-E
Overall length - fractional inch (OAL)
12
Overall length - millimeter (OAL)
304.8
Point Angle (SIG)
135
Spiral form
Standard Spiral
Surface treatement
Steam Tempered
Usable length (ULDR)
4
The 500-12 long series aircraft extension drill bits conform to NAS907 type J, in fractional sizes from 1/16” to 1/4” in 1/64 “ increments.
The drills are manufactured from premium High Speed cobalt so are suitable for drilling in many materials, including steels, stainless steel and aluminum and have a long overall length of 12 inches with short flute length to provide stable drilling in hard to reach areas.
The drills have a 135 degree split point, designed to self-center, with low thrust for better penetration, and a bronze oxide finish to prevent workpiece material from sticking to the cutting edges of the tool for cleaner, more accurate holes.
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