NAS1205-1
View detailed technical data, stock status, and sourcing information for: NAS1205-1
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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.
0.375 inches nominal thread length, flat countersunk head style, 3a thread class, 0.437 inches nominal fastener length, right-hand thread direction
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.375 inches nominal
- Fastener Length
- 0.437 inches nominal
- Head Style
- flat countersunk
- Head Diameter
- 0.577 inches minimum and 0.635 inches maximum
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.312 inches
- Thread Quantity Per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell c minimum and 40.0 rockwell c maximum
- Countersink Angle
- 100.0 degrees nominal
- Screw Material
- steel
- Screw Surface Treatment
- cadmium and chromate or zinc and chromate
- Thread Series Designator
- unf
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 |
|---|---|
| NAS1205-1 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-890-0086?
Does the NSN 5305-00-890-0086 have a Schedule B code assigned?
Does NSN 5305-00-890-0086 require demilitarization?
Does NSN 5305-00-890-0086 contain precious materials?
Does NSN 5305-00-890-0086 contain hazardous materials?
When the NSN 5305-00-890-0086 was assigned to the Federal Catalog?
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