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Setscrew NSN 5305-00-249-0591

Item Description

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

NSN 5305-00-249-0591 NSN: 5305-00-249-0591

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Fastener Length
Between 1.438 inches and 1.500 inches
Head Style
Square
Head Height
Between 0.178 inches and 0.196 inches
Width Between Flats
Between 0.241 inches and 0.250 inches
Point Style
Cup
Internal Drive Style
W/o internal drive
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Hardness Rating
45.0 rockwell c and 53.0 rockwell c
Part Name Assigned By Controlling Agency
Setscrew
Material
Steel comp 4037 or steel comp 4137 or steel comp 4140 or steel comp 8630 or steel comp 8740
Material Specification
66 federal standard all material responses
Thread Series Designator
Unc
Nondefinitive Specification/std Data
A type
FSC
5305 Screws
NIIN
002490591
NSN
5305002490591

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
FF-S-21
Cage Code:
81348
Status:
A
MSDS:
Part Number:
MILB933TYPEA
Cage Code:
81349
Status:
A
MSDS:
Part Number:
MIL-B-933TYPEA
Cage Code:
81349
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 5305-00-249-0591
What are the manufacturers of nsn 5305002490591?
Does this nsn 5305002490591 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305002490591
An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. a locking feature may be incorporated in the design of the head or threads.
Does nsn 5305002490591 contain any precious metals?
Precious metal content is unknown.
Does nsn 5305002490591 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305002490591?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
06672
FIIG:
A003B0
App. Key:
SQ
Cond. Code:
1
Status:
A

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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
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