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Close Tolerance Screw NSN 5305-00-031-2387

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 5305-00-031-2387 NSN: 5305-00-031-2387

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.400 inches and 0.450 inches
Fastener Length
Between 1.035 inches and 1.065 inches
Head Style
Pan no. 2
Head Diameter
Between 0.367 inches and 0.375 inches
Head Height
Between 0.133 inches and 0.150 inches
Locking Feature
Patch threads or pellet threads or strip threads
Grip Diameter
Between 0.2485 inches and 0.2495 inches
Internal Drive Style
Cross recess type 1
Thread Diameter
0.250 inches
Grip Length
Between 0.615 inches and 0.635 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Hardness Rating
36.0 rockwell c and 40.0 rockwell c
Surface Finish
32.0 microinches threads
Material
Steel comp 4140 fastener or steel comp e4340 fastener or steel comp 8740 fastener
Material Specification
Mil-s-5626 military specification 1st material response fastener or mil-s-5000 military specification 2nd material response fastener or mil-s-6049 military specification 3rd material response fastener
Surface Treatment
Cadmium fastener and chromate fastener
Surface Treatment Specification
Qq-p-416 ty2 cl2 federal specification single treatment response fastener
Thread Series Designator
Unjf
Specification Data
80502-nas1184 professional/industrial association standard
FSC
5305 Screws
NIIN
000312387
NSN
5305000312387

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
NAS1184-10
Cage Code:
80205
Status:
A
MSDS:
Part Number:
AIC1184-310
Cage Code:
06725
Status:
A
MSDS:
Part Number:
CA1184-310
Cage Code:
93907
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 5305-00-031-2387
What are the manufacturers of nsn 5305000312387?
Does this nsn 5305000312387 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305000312387
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 5305000312387 contain any precious metals?
Precious metal content is unknown.
Does nsn 5305000312387 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305000312387?
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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