S235A163-105
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A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.
2a thread class, 0.406 inches minimum and 0.437 inches maximum fastener length, right-hand thread direction, 0.213 inches minimum and 0.223 inches maximum thread length, flat countersunk head style
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.213 inches minimum and 0.223 inches maximum
- Fastener Length
- 0.406 inches minimum and 0.437 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.225 inches nominal
- First Diameter From Head
- 0.073 inches minimum and 0.083 inches maximum
- Distance From Largest Bearing Surface Of Head To End Of First Diameter
- 0.219 inches nominal
- Point Style
- cone
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.112 inches
- Thread Quantity Per Inch
- 40
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Externally Relieved Body Diameter Quantity
- 1
- Material
- steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316 overall
- Material Document And Classification
- fed std 66 fed std all material responses overall
- Surface Treatment
- passivate overall
- Surface Treatment Document And Classification
- qq-p-35 fed spec single treatment response overall
- Thread Series Designator
- unc
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| S235A163-105 | Externally Relieved Body Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-406-5450?
Does the NSN 5305-01-406-5450 have a Schedule B code assigned?
Does NSN 5305-01-406-5450 require demilitarization?
Does NSN 5305-01-406-5450 contain precious materials?
Does NSN 5305-01-406-5450 contain hazardous materials?
When the NSN 5305-01-406-5450 was assigned to the Federal Catalog?
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