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Close Tolerance Screw NSN 5305-01-249-3076

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 5305-01-249-3076 NSN: 5305-01-249-3076

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.444 inches and 0.494 inches
Fastener Length
Between 1.142 inches and 1.172 inches
Head Style
Flat countersunk
Head Diameter
Between 0.497 inches and 0.507 inches
Grip Diameter
Between 0.2490 inches and 0.2495 inches
Internal Drive Style
High-torque
Thread Diameter
0.250 inches
Grip Length
Between 0.678 inches and 0.698 inches
Thready Qty Per Inch (tpi)
28
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Part Name Assigned By Controlling Agency
Navy special project
Special Features
Tapped hole in head 0.1380-32, unjc-3b threads; distance from head top to injection port 0.400 in. ; injection port 0.120 in. Lg, 0.060 in. W
Material
Titanium alloy uns r56400
Material Specification
Ams4928 assn standard single material response or ams4967 assn standard single material response
Thread Series Designator
Unf
FSC
5305 Screws
NIIN
012493076
NSN
5305012493076

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
HT4075V4-11-40
Cage Code:
06950
Status:
A
MSDS:
Part Number:
3M1034V4-11-40
Cage Code:
76301
Status:
A
MSDS:
Part Number:
11839V4-11-40
Cage Code:
59563
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8109900000
  • NAICS: 331491
  • SITC: 69987
  • Description: Zirconium and articles thereof nesoi
  • End Use (Code 12300):
    Finished metal shapes

Q & A

Frequently asked questions for NSN 5305-01-249-3076
What are the manufacturers of nsn 5305012493076?
Does this nsn 5305012493076 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305012493076
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 5305012493076 contain any precious metals?
No precious metal content.
Does nsn 5305012493076 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305012493076?
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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