Model: 50281

Thin Steel Square

Special Features:

The blade of the starrtt 55 square is beveled on both edges; bevel thickness is 0.015-0.020 inch; material aisi-01 steel; hardness beam 57-63 rockwell c, blade 53-59 rockwell c; finish grain rubbed steel; blade to base squareness 0.0001 inch; beam flatness is to shut out light; lateral squareness 0.008 inch max; length of blade 4.5 inch from the inner edge of the beam to the end of the blade; length of beam 3.5 inch

Properties:

Part Name Assigned By Controlling Agency
Master precision square with beveled edges
Material
Steel
NSN
5210-01-551-9992
Part Number
50281
Description
Square,thin Steel
CAGE
57163

A measuring tool consisting of a onepiece, precision-ground steel body and tongue forming a 90 degree angle. It is graduated on the inside edge of the tongue (short leg) and the outside edge of the body (long leg).

Part 50281 NSN 5210-01-551-9992

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
13769
FIIG:
A23900
Concept No.:
App. Key:
A
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:
A
ESD:
A
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 9017208060
  • SITC: 87422
  • End Use: Measuring, testing, control instruments
  • NAICS: 334519
  • USDA: 1

Freight Class: Drawing, marking-out or mathematical calculating instruments, nesoi

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