STD2180E25
View detailed technical data, stock status, and sourcing information for: STD2180E25
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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.
3a thread class, flat countersunk head style, 0.490 inches nominal fastener length, 0.240 inches nominal thread 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
- 0.240 inches nominal
- Fastener Length
- 0.490 inches nominal
- Head Style
- flat countersunk
- Head Diameter
- 0.452 inches minimum and 0.510 inches maximum
- Grip Diameter
- 0.2495 inches minimum and 0.2504 inches maximum
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.250 inches nominal
- Thread Quantity Per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Material
- titanium alloy overall
- Surface Treatment
- cadmium overall
- Surface Treatment Document And Classification
- std.2167 cagec k0289 mfr ref single treatment response overall
- 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 |
|---|---|
| 99-6038823 | Close Tolerance Screw |
| STD2180E25 | Close Tolerance Screw |
FAQs
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What is the FSCG of the NSN 5305-00-471-6645?
Does the NSN 5305-00-471-6645 have a Schedule B code assigned?
Does NSN 5305-00-471-6645 require demilitarization?
Does NSN 5305-00-471-6645 contain precious materials?
Does NSN 5305-00-471-6645 contain hazardous materials?
When the NSN 5305-00-471-6645 was assigned to the Federal Catalog?
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