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Externally Relieved Body Bolt NSN 5306-00-251-2181

Item Description

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.

NSN 5306-00-251-2181 NSN: 5306-00-251-2181

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Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.656 inches and 0.718 inches
Fastener Length
Between 1.094 inches and 1.156 inches
Head Style
Square
Head Height
Between 0.155 inches and 0.160 inches
Width Between Flats
Between 1.094 inches and 1.156 inches
First Diameter From Head
Between 0.620 inches and 0.625 inches
Second Diameter From Head
Between 0.499 inches and 0.501 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
Between 0.219 inches and 0.281 inches
Distance From Largest Bearing Surface Of Head To End Of Second Diameter
Between 0.313 inches and 0.385 inches
Thread Diameter
0.625 inches
Thready Qty Per Inch (tpi)
18
Hardness Rating
30.0 rockwell c and 34.0 rockwell c
Externally Relieved Body Diameter Quantity
2
Material
Steel
Surface Treatment
Cadmium
Thread Series Designator
Unf
FSC
5306 Bolts
NIIN
002512181
NSN
5306002512181

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
4X181C1
Cage Code:
98296
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7318152000
  • NAICS: 332722
  • SITC: 69421
  • Description: Bolts and bolts and their nuts or washers exported in the same shipment
  • End Use (Code 12110):
    Iron and steel products, other

Q & A

Frequently asked questions for NSN 5306-00-251-2181
What are the manufacturers of nsn 5306002512181?
Does this nsn 5306002512181 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5306002512181
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.
Does nsn 5306002512181 contain any precious metals?
Precious metal content is unknown.
Does nsn 5306002512181 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5306002512181?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
06675
FIIG:
A003B0
App. Key:
BF
Cond. Code:
1
Status:
A

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