Model: 44788

Valve Tappet Adjusting Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Casehardening Indicator
Not casehardened
Slot Depth
0.078 inches
Slot Depth
0.078 inches
Thread Length
1.016 inches
Slot Width
0.047 inches
Overall Length
1.156 inches
Taper Length
0.031 inches
Taper Length
0.031 inches
Taper Minor Diameter
0.188 inches
Thread Size
1/4-28
End Length
0.141 inches
Smallest Diameter
0.250 inches
Thread Series
Unf
Material
Steel
Material
Steel
Style Designator
Flat head, straight, thread, tapered drive end
Fsc Application Data
Aircraft eng r1830
NSN
2810-00-118-4250
Part Number
44788
Description
Screw,adjusting,valve Tappet
CAGE
00198

An externally threaded screw-like device with a hexagon, square, slotted or any other type drive end. The other end may have a spherical ball, socket or other type of machined surface. It may have a concentric hole along the longitudinal centerline and a hole perpendicular to the axis joining the concentric hole for lubrication. It is specifically designed to be used as a means for adjusting engine poppet valve tappet clearances and may be furnished with a lock nut.

Part 44788 NSN 2810-00-118-4250

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
33266
FIIG:
T267-M
Concept No.:
App. Key:
MA
Cond. Code:
2
Status:
A

Material Classification

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

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Schedule B and Export
  • Schedule B: 8409100080
  • SITC: 71319
  • End Use: Engines and turbines for military aircraft
  • NAICS: 336412
  • USDA: 1

Freight Class: Parts for spark-ignition or compression-ignition internal combustion piston engines for use in aircraft except civil

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