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Close Tolerance Screw NSN 5305-00-842-1641

Item Description

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

NSN 5305-00-842-1641 NSN: 5305-00-842-1641

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Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.312 inches and 0.332 inches
Fastener Length
1.290 inches
Head Style
Flat chamfer
Head Diameter
Between 0.436 inches and 0.437 inches
Head Height
Between 0.253 inches and 0.273 inches
Grip Diameter
Between 0.3112 inches and 0.3117 inches
Shank Unthreaded Hole Diameter
0.076 inches first hole and 0.086 inches first hole
Internal Drive Style
Hexagon
Thread Diameter
0.312 inches
Grip Length
Between 0.750 inches and 0.790 inches
Width Across Flats
Between 0.210 inches and 0.221 inches
Thready Qty Per Inch (tpi)
24
Distance From Head Largest Bearing Surface To Shank Hole Center
1.144 inches first hole
Special Features
Retaining element in shank
Material
Steel comp 630
Material Specification
Fms 0131 fscm 81755 mfr ref single material response
Surface Treatment
Passivate
Surface Treatment Specification
Zc00035 fsmc 29372 mfr ref single treatment response
Thread Series Designator
Unf
FSC
5305 Screws
NIIN
008421641
NSN
5305008421641

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
AS104-05-12
Cage Code:
84256
Status:
A
MSDS:
Part Number:
CA2730-5-12
Cage Code:
29372
Status:
A
MSDS:
Part Number:
CC00035-5-12
Cage Code:
81755
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 5305-00-842-1641
What are the manufacturers of nsn 5305008421641?
Does this nsn 5305008421641 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305008421641
A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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 designed to be held or driven with an inserted driver. it is not designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads.
Does nsn 5305008421641 contain any precious metals?
Precious metal content is unknown.
Does nsn 5305008421641 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305008421641?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
29294
FIIG:
A003B0
App. Key:
SS
Cond. Code:
1
Status:
A

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