Model: 121B

Eccentric Head Bolt

Properties:

Thread Class

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)

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:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

TCC:

SHC:

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