Model: 138912

Externally Relieved Body Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.300 inches and 0.330 inches

Fastener Length

1.880 inches

Head Style

Flat chamfer

Head Diameter

Between 0.490 inches and 0.519 inches

Head Height

0.120 inches

Shank Unthreaded Hole Diameter

0.073 inches first hole

First Diameter From Head

Between 0.344 inches and 0.345 inches

Second Diameter From Head

Between 0.341 inches and 0.342 inches

Third Diameter From Head

0.240 inches

Fourth Diameter From Head

Between 0.305 inches and 0.312 inches

Fifth Diameter From Head

0.240 inches

Distance From Largest Bearing Surface Of Head To End Of First Diameter

Between 0.265 inches and 0.305 inches

Distance From Largest Bearing Surface Of Head To End Of Second Diameter

0.275 inches

Distance From Largest Bearing Surface Of Head To End Of Third Diameter

0.855 inches

Distance From Largest Bearing Surface Of Head To End Of Fourth Diameter

1.850 inches

Thread Diameter

0.312 inches

Thready Qty Per Inch (tpi)

Hardness Rating

26.0 rockwell c and 32.0 rockwell c

Distance From Head Largest Bearing Surface To Shank Hole Center

1.760 inches first hole

Externally Relieved Body Diameter Quantity

Material

Steel comp 4140 or steel comp 8740

Thread Series Designator

Unf

NSN

5306-00-302-8637

Part Number

138912

Description

Bolt,externally Relieved Body

CAGE

0AHP5

An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercuts for thread relief). It is no. 10 (0.190 in.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, internal wrenching and thumbscrew. See also screw, externally relieved body.

Part 138912 NSN 5306-00-302-8637

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06675

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