Model: MIL-S-24240/4-20406

Machine Bolt

Special Features:

Construction of extended washer is optional

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.734 inches and 0.766 inches
Fastener Length
Between 0.734 inches and 0.766 inches
Head Style
Double hexagon extended washer
Head Height
Between 0.244 inches and 0.250 inches
Width Between Flats
Between 0.249 inches and 0.253 inches
Extended Washer Diameter
Between 0.365 inches and 0.375 inches
Extended Washer Thickness
Between 0.068 inches and 0.088 inches
Thread Diameter
0.250 inches
Grip Length
Between 0.734 inches and 0.766 inches
Thready Qty Per Inch (tpi)
28
Material
Steel
Surface Treatment
Cadmium
Thread Series Designator
Unf
Specification Data
81349-mil-s-24240/4 government specification
NSN
5306-01-272-5795
Part Number
MIL-S-24240/4-20406
Description
Bolt,machine
CAGE
81349

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

Part MIL-S-24240/4-20406 NSN 5306-01-272-5795

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01847
FIIG:
A003B0
Concept No.:
App. Key:
BR
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:
U
ESD:
ESD:
MMAC:
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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