Model: 121B

Eccentric Head Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Fastener Length
2.375 inches
Head Style
Double hexagon
Head Diameter
Between 0.685 inches and 0.688 inches
Head Height
0.250 inches
Distance From Center Of Head To Center Of Shank
0.312 inches
Shank Unthreaded Hole Diameter
0.109 inches first hole
Internal Drive Style
W/o internal drive
Thread Diameter
0.437 inches
Thready Qty Per Inch (tpi)
20
Min. Tensile Strength (psi)
135000 pounds per square inch
Hardness Rating
28.0 rockwell c and 31.0 rockwell c
Distance From Head Largest Bearing Surface To Shank Hole Center
2.266 inches first hole
Material
Steel comp 3140
Material Specification
Sae assn standard single material response
Thread Series Designator
Unf
NSN
5306-00-362-3707
Part Number
121B
Description
Bolt,eccentric Head
CAGE
99267

An externally threaded fastener the head of which is usually flat with a periphery not concentric to the bolt shank. The head is not designed for wrenching. It may have a drive feature located at the threaded end, which can be used to rotate the screw and eccentric head into a locking position to secure a flanged or groove component.

Part 121B NSN 5306-00-362-3707

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
21861
FIIG:
A003B0
Concept No.:
App. Key:
BE
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:
--
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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