Model: 1638-20

Twist Drill

Properties:

Shank Style
Externally threaded
Overall Length
2.125 inches
Thread Diameter
0.250 inches
Cutting End Style
General purpose
Cutting Diameter
0.1610 inches
Cutting Rotation Direction
Right-hand
Flute Length
1.125 inches
Flute Quantity
2
Point Type
Notched
Hardness Rating
Between 40.0 rockwell c and 53.0 rockwell c
Thread Quantity
28 per inch
Material
Steel
Thread Series Designator
Unf
NSN
5133-00-850-3307
Part Number
1638-20
Description
Drill,twist
CAGE
1NEX4

An end cutting tool having two or more cutting edges, and having helical flutes or grooves adjacent thereto for the admission of coolant and the ejection of cuttings or chips. It is used for drilling holes in various materials. Excludes drill, masonry (as modified); and drill,twist, bone. See also drill, pivot, jeweler's and drill, hardened steel, carbide tipped.

Part 1638-20 NSN 5133-00-850-3307

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05237
FIIG:
A188A0
Concept No.:
App. Key:
L
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8205100000
  • SITC: 69541
  • End Use: Photo, service industry machinery
  • NAICS: 332216
  • USDA: 1

Freight Class: Drilling, threading or tapping tools and parts thereof, base metal

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