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Close Tolerance Bolt NSN 5306-00-121-8851

Item Description

An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

NSN 5306-00-121-8851 NSN: 5306-00-121-8851

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Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.282 inches and 0.333 inches
Fastener Length
Between 2.043 inches and 2.063 inches
Head Style
Dished hexagon
Head Height
Between 0.126 inches and 0.141 inches
Width Between Flats
Between 0.430 inches and 0.439 inches
Grip Diameter
Between 0.2483 inches and 0.2492 inches
Shank Unthreaded Hole Diameter
0.076 inches first hole and 0.086 inches first hole
Thread Diameter
0.250 inches
Grip Length
Between 1.625 inches and 1.641 inches
Thready Qty Per Inch (tpi)
28
Hardness Rating
36.0 rockwell c and 41.0 rockwell c
Distance From Head Largest Bearing Surface To Shank Hole Center
1.943 inches first hole and 1.973 inches first hole
Surface Finish
63.0 microinches grip
Special Features
W/retaining element on shank
Material
Steel
Material Specification
Mil-b-83050 military specification single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 type 2 cl 2 federal specification all treatment responses
Thread Series Designator
Unjf
FSC
5306 Bolts
NIIN
001218851
NSN
5306001218851

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
106467-4-26
Cage Code:
80539
Status:
A
MSDS:
Part Number:
AS194-4-26
Cage Code:
84256
Status:
A
MSDS:
Part Number:
MS27576-4-26
Cage Code:
80205
Status:
A
MSDS:
Part Number:
CA4510-4-26
Cage Code:
29372
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 5306-00-121-8851
What are the manufacturers of nsn 5306001218851?
Does this nsn 5306001218851 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5306001218851
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. the head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. for items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. for items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.
Does nsn 5306001218851 contain any precious metals?
Precious metal content is unknown.
Does nsn 5306001218851 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5306001218851?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
27851
FIIG:
A003B0
App. Key:
BC
Cond. Code:
1
Status:
A

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