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Close Tolerance Screw NSN 5305-01-139-0850

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 5305-01-139-0850 NSN: 5305-01-139-0850

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.313 inches and 0.363 inches
Fastener Length
Between 0.823 inches and 0.853 inches
Head Style
Flat countersunk
Head Diameter
Between 0.339 inches and 0.381 inches
Grip Diameter
Between 0.1885 inches and 0.1895 inches
Shank Unthreaded Hole Diameter
0.070 inches first hole and 0.080 inches first hole
Internal Drive Style
High-torque
Thread Diameter
0.190 inches
Grip Length
Between 0.490 inches and 0.510 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
180000 pounds per square inch
Hardness Rating
39.0 rockwell c and 43.0 rockwell c
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Distance From Head Largest Bearing Surface To Shank Hole Center
0.696 inches first hole and 0.746 inches first hole
Surface Finish
32.0 microinches threads
Material
Steel comp 8740
Material Specification
Mil-s-6049 military specification single material response
Surface Treatment
Aluminum and chromate
Surface Treatment Specification
Mil-c-83488 type 2 class 3 military specification single treatment response
Thread Series Designator
Unjf
FSC
5305 Screws
NIIN
011390850
NSN
5305011390850

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
HT4054-3D8A
Cage Code:
06950
Status:
A
MSDS:
Part Number:
ST3M730-3DL8
Cage Code:
76301
Status:
A
MSDS:
Part Number:
10115401
Cage Code:
A486G
Status:
A
MSDS:
Part Number:
ST3M730-3D8
Cage Code:
76301
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 5305-01-139-0850
What are the manufacturers of nsn 5305011390850?
Does this nsn 5305011390850 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305011390850
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 5305011390850 contain any precious metals?
No precious metal content.
Does nsn 5305011390850 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305011390850?
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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  •   Certificate of Conformance
  •   Quality Inspected Parts
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