Model: N31251E

Machine Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.875 inches
Fastener Length
1.750 inches
Head Style
Hexagon
Head Height
Between 0.365 inches and 0.385 inches
Width Between Flats
Between 0.737 inches and 0.750 inches
Thread Diameter
0.500 inches
Features Provided
Finished head
Thready Qty Per Inch (tpi)
20
Min. Tensile Strength (psi)
124000 pounds per square inch
Hardness Rating
25.0 rockwell c and 34.0 rockwell c
Material
Steel comp 1340 or steel comp 2330 or steel comp 3135
Material Specification
Sae assn standard all material responses
Thread Series Designator
Unf
NSN
5306-00-272-3750
Part Number
N31251E
Description
Bolt,machine
CAGE
56442

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 N31251E NSN 5306-00-272-3750

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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