Model: MS21281-12

Machine Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.876 inches
Fastener Length
1.000 inches
Head Style
Double hexagon w/hole
Head Height
0.375 inches
Width Between Flats
Between 0.367 inches and 0.376 inches
Extended Washer Diameter
0.419 inches
Extended Washer Thickness
Between 0.070 inches and 0.080 inches
End Application
F-119
Thread Diameter
0.312 inches
Features Provided
Finished head
Thready Qty Per Inch (tpi)
24
Surface Finish
32.0 microinches threads
Surface Finish
63.0 microinches bearing surface of head
Surface Finish
63.0 microinches grip
Material
Iron alloy 660
Material Specification
Ams 5732 assn standard single material response
Thread Series Designator
Unjf
NSN
5306-01-486-2356
Part Number
MS21281-12
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 MS21281-12 NSN 5306-01-486-2356

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:
A
ESD:
ESD:
MMAC:
RF
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

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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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