Model: MS21279-24

Machine Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.625 inches and 0.685 inches
Fastener Length
Between 1.615 inches and 1.635 inches
Head Style
Double hexagon w/hole
Head Height
Between 0.250 inches and 0.270 inches
Width Between Flats
Between 0.243 inches and 0.251 inches
Extended Washer Diameter
Between 0.365 inches and 0.385 inches
Extended Washer Thickness
Between 0.040 inches and 0.050 inches
Thread Diameter
0.190 inches
Grip Length
Between 0.940 inches and 1.000 inches
Features Provided
Finished head
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
130000 pounds per square inch
Hardness Rating
24.0 rockwell c and 35.0 rockwell c
Minimum Yield Strength
85000 pounds per square inch
Surface Finish
125.0 microinches head
Surface Finish
32.0 microinches threads
Surface Finish
63.0 microinches grip
Material
Iron alloy 660
Material Specification
Ams5736, uns s66286 assn standard single material response
Supplementary Features
Mfr specification ams 7478, 649.0 degrees c temp max appl, except hot or cold upset formed heads
Thread Series Designator
Unjf
Specification Data
96906-ns21279 government standard
NSN
5306-01-282-7488
Part Number
MS21279-24
Description
Bolt,machine
CAGE
96906

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 MS21279-24 NSN 5306-01-282-7488

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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