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Close Tolerance Screw NSN 5305-00-351-4521

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 5305-00-351-4521 NSN: 5305-00-351-4521

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.421 inches and 0.453 inches
Fastener Length
Between 1.124 inches and 1.144 inches
Head Style
Flat countersunk
Head Diameter
Between 0.568 inches and 0.635 inches
Grip Diameter
Between 0.2480 inches and 0.2492 inches
Internal Drive Style
Offset cruciform (torque set)
Thread Diameter
0.250 inches
Grip Length
Between 0.584 inches and 0.604 inches
Thready Qty Per Inch (tpi)
28
Countersink Angle
100.0 degrees
Special Features
Retaining element in shank
Material
Iron alloy 660 or steel comp 303 or steel comp 303se or steel comp 303 plus x
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Thread Series Designator
Unf
FSC
5305 Screws
NIIN
003514521
NSN
5305003514521

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
CA2720-4-0594
Cage Code:
29372
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 5305-00-351-4521
What are the manufacturers of nsn 5305003514521?
Does this nsn 5305003514521 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305003514521
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 5305003514521 contain any precious metals?
Precious metal content is unknown.
Does nsn 5305003514521 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305003514521?
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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