321-E
View detailed technical data, stock status, and sourcing information for: 321-E
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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.
plug flow control device, plain (pipe) 1st end connection style, threaded external pipe 1st end connection type, right-hand all ends thread direction, manual valve operation method
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Direction
- right-hand all ends
- Flow Control Device
- plug
- Connection Style
- plain (pipe) 1st end
- Valve Operation Method
- manual
- Connection Type
- threaded external pipe 1st end
- Maximum Operating Pressure
- 150.0 pounds per square inch single response
- Nominal Thread Size
- 0.250 inches all ends
- Material
- copper alloy body
- Style Designator
- straight thru
- Thread Series Designator
- npt all ends
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5120-00-319-0105 | No Name Available | 10/01/1976 |
| 4820-01-169-7580 | No Name Available | 06/01/1988 |
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FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 4820-00-844-6744?
Does the NSN 4820-00-844-6744 have a Schedule B code assigned?
Does NSN 4820-00-844-6744 require demilitarization?
Does NSN 4820-00-844-6744 contain precious materials?
Does NSN 4820-00-844-6744 contain hazardous materials?
When the NSN 4820-00-844-6744 was assigned to the Federal Catalog?
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Pricing
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