Model: 2743999-1

Setscrew

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.700 inches and 0.710 inches
Fastener Length
Between 2.490 inches and 2.510 inches
Head Style
Headless (setscrew)
Hole Diameter
Between 0.040 inches and 0.050 inches
Point Length
Between 1.780 inches and 1.810 inches
Point Diameter
Between 0.079 inches and 0.081 inches
Point Style
Chamfer dog
Internal Drive Style
Slot
Thread Diameter
0.250 inches
Hole Quantity
1
Hole Type
Drilled
Thready Qty Per Inch (tpi)
20
Point Chamfer Angle
Between 40.0 degrees and 50.0 degrees
Material
Steel comp 4130
Material Specification
Mil-2-6758, comp 4130 military specification single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2 federal specification single treatment response
Thread Series Designator
Unc
NSN
5305-01-398-4022
Part Number
2743999-1
Description
Setscrew
CAGE
70210

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

Part 2743999-1 NSN 5305-01-398-4022

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06672
FIIG:
A003B0
Concept No.:
App. Key:
SQ
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:
BA
CRITL:
X

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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