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Close Tolerance Screw NSN 5305-01-497-2680

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 5305-01-497-2680 NSN: 5305-01-497-2680

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.340 inches
Fastener Length
1.510 inches
Head Style
Hexagon
Head Height
0.156 inches
Width Between Flats
Between 0.615 inches and 0.627 inches
Grip Diameter
Between 0.4362 inches and 0.4367 inches
Shank Unthreaded Hole Diameter
0.106 inches first hole
End Application
B-52 aircraft
Thread Diameter
0.438 inches
Grip Length
Between 1.000 inches and 1.010 inches
Thready Qty Per Inch (tpi)
20
Distance From Head Largest Bearing Surface To Shank Hole Center
1.230 inches first hole
Material
Steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140
Thread Series Designator
Unf
FSC
5305 Screws
NIIN
014972680
NSN
5305014972680

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
3-55588-1
Cage Code:
81205
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 5305-01-497-2680
What are the manufacturers of nsn 5305014972680?
Does this nsn 5305014972680 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305014972680
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 5305014972680 contain any precious metals?
No precious metal content.
Does nsn 5305014972680 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305014972680?
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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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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