Model: 494D7

Externally Relieved Body Bolt

Special Features:

Sixth diameter from head 0.387 in. Min and 0.391 in. Max length from largest bearing of head to end of sixth diameter 8.510 in.

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.900 inches and 0.960 inches
Fastener Length
9.440 inches
Head Style
Hexagon
Head Height
0.344 inches
Width Between Flats
Between 0.741 inches and 0.750 inches
Hole Diameter
0.070 inches
First Diameter From Head
Between 0.494 inches and 0.500 inches
Second Diameter From Head
Between 0.387 inches and 0.391 inches
Third Diameter From Head
Between 0.494 inches and 0.500 inches
Fourth Diameter From Head
Between 0.426 inches and 0.430 inches
Fifth Diameter From Head
Between 0.494 inches and 0.500 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
0.300 inches
Distance From Largest Bearing Surface Of Head To End Of Second Diameter
0.400 inches
Distance From Largest Bearing Surface Of Head To End Of Third Diameter
0.600 inches
Distance From Largest Bearing Surface Of Head To End Of Fourth Diameter
0.800 inches
Distance From Largest Bearing Surface Of Head To End Of Fifth Diameter
1.000 inches
Thread Diameter
0.500 inches
Hole Quantity
6
Hole Type
Drilled
Thready Qty Per Inch (tpi)
20
Hardness Rating
26.0 rockwell c and 32.0 rockwell c
Hardness Rating
26.0 rockwell c and 32.0 rockwell c
Hole Configuration Style
Hexagon longitudinal hole
Externally Relieved Body Diameter Quantity
5
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel comp 8740
Surface Treatment
Cadmium
Thread Series Designator
Unf
NSN
5306-00-589-7704
Part Number
494D7
Description
Bolt,externally Relieved Body
CAGE

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 494D7 NSN 5306-00-589-7704

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06675
FIIG:
A003B0
Concept No.:
App. Key:
BF
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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
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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