NAS1581K6T20
View detailed technical data, stock status, and sourcing information for: NAS1581K6T20
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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.
flat countersunk head style, right-hand thread direction, 3a thread class, 0.569 inches minimum and 0.619 inches maximum thread length, 1.829 inches minimum and 1.859 inches maximum fastener length
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
- 0.569 inches minimum and 0.619 inches maximum
- Fastener Length
- 1.829 inches minimum and 1.859 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.515 inches minimum and 0.566 inches maximum
- Grip Diameter
- 0.3740 inches minimum and 0.3745 inches maximum
- Internal Drive Style
- offset cruciform (torque set)
- Nominal Thread Diameter
- 0.375 inches
- Grip Length
- 1.240 inches minimum and 1.260 inches maximum
- Thread Quantity Per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Countersink Angle
- 100.0 degrees nominal
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- titanium alloy uns r54520 overall
- Material Document And Classification
- nas621 assn std single material response overall
- Thread Series Designator
- unjf
- Specification/Standard Data
- 80205-nas1581 professional/industrial association standard
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 |
|---|---|
| NAS1581K6T20 | Close Tolerance Screw |
| NAS1581V6T20 | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-057-0354?
Does the NSN 5305-01-057-0354 have a Schedule B code assigned?
Does NSN 5305-01-057-0354 require demilitarization?
Does NSN 5305-01-057-0354 contain precious materials?
Does NSN 5305-01-057-0354 contain hazardous materials?
When the NSN 5305-01-057-0354 was assigned to the Federal Catalog?
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