5305-01-056-2158
Find complete technical information, availability, and procurement data for: 5305-01-056-2158
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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.
right-hand thread direction, flat countersunk head style, 0.955 inches minimum and 0.985 inches maximum fastener length, 0.320 inches minimum and 0.370 inches maximum thread length, 3a thread class
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
- 0.320 inches minimum and 0.370 inches maximum
- Fastener Length
- 0.955 inches minimum and 0.985 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.295 inches minimum and 0.334 inches maximum
- Grip Diameter
- 0.1625 inches minimum and 0.1635 inches maximum
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.164 inches
- Grip Length
- 0.615 inches minimum and 0.635 inches maximum
- Thread Quantity Per Inch
- 32
- Countersink Angle
- 100.0 degrees nominal
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- steel comp e4340 or steel comp 4340 or steel comp 8740 overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416,type 2,class 2 fed spec single treatment response overall
- Thread Series Designator
- unc
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5305-01-070-1692 | No Name Available | 06/01/1994 |
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 |
|---|---|
| BACB30LU2-10 | Close Tolerance Screw |
FAQs
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Does NSN 5305-01-056-2158 require demilitarization?
Does NSN 5305-01-056-2158 contain precious materials?
Does NSN 5305-01-056-2158 contain hazardous materials?
When the NSN 5305-01-056-2158 was assigned to the Federal Catalog?
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