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Close Tolerance Screw NSN 5305-01-243-0755

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 5305-01-243-0755 NSN: 5305-01-243-0755

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Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.378 inches and 0.428 inches
Fastener Length
Between 1.763 inches and 1.793 inches
Head Style
Pan no. 2
Head Diameter
Between 0.477 inches and 0.492 inches
Head Height
Between 0.140 inches and 0.150 inches
Grip Diameter
Between 0.2485 inches and 0.2495 inches
Internal Drive Style
Offset cruciform (torque set)
Thread Diameter
0.250 inches
Grip Length
Between 1.365 inches and 1.385 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Surface Finish
32.0 microinches threads
Material
Iron alloy 660
Material Specification
Ams5731 assn standard single material response or ams5732 assn standard single material response or ams5737 assn standard single material response
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Thread Series Designator
Unjf
Specification Data
80205-nas1578 professional/industrial association standard
FSC
5305 Screws
NIIN
012430755
NSN
5305012430755

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
NAS1578C4T22
Cage Code:
80205
Status:
A
MSDS:
Part Number:
10113578
Cage Code:
A486G
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 5305-01-243-0755
What are the manufacturers of nsn 5305012430755?
Does this nsn 5305012430755 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305012430755
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 5305012430755 contain any precious metals?
No precious metal content.
Does nsn 5305012430755 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305012430755?
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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