5305-00-121-8908
Find complete technical information, availability, and procurement data for: 5305-00-121-8908
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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, 3a thread class, 0.282 inches minimum and 0.333 inches maximum thread length, 1.356 inches minimum and 1.376 inches maximum fastener length, flat countersunk head style
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
- 0.282 inches minimum and 0.333 inches maximum
- Fastener Length
- 1.356 inches minimum and 1.376 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.449 inches minimum and 0.507 inches maximum
- Locking Feature
- detent ring grip
- Grip Diameter
- 0.2483 inches minimum and 0.2492 inches maximum
- Shank Unthreaded Hole Diameter
- 0.076 inches minimum and 0.086 inches maximum first hole
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.938 inches minimum and 0.954 inches maximum
- Thread Quantity Per Inch
- 28
- Hardness Rating
- 36.0 rockwell c minimum and 41.0 rockwell c maximum overall
- Countersink Angle
- 100.0 degrees nominal
- Distance From Head Largest Bearing Surface To Shank Hole Center
- 1.256 inches minimum and 1.286 inches maximum first hole
- Surface Finish
- 63.0 microinches grip
- Surface Finish
- 63.0 microinches top of head
- Material
- steel overall
- Material Document And Classification
- mil-b-83050 mil spec single material response overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416 ty 2 cl 2 fed spec single treatment response overall
- Thread Series Designator
- unjf
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5305-01-071-8765 | No Name Available | 06/01/2006 |
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 |
|---|---|
| 106466-15 | Close Tolerance Screw |
| 121672-4-15 | Close Tolerance Screw |
| AS195-4-15 | Close Tolerance Screw |
| CA4520-4-15 | Close Tolerance Screw |
| MS27577-4-15 | Close Tolerance Screw |
| ST3M736-4-15 | Close Tolerance Screw |
FAQs
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When the NSN 5305-00-121-8908 was assigned to the Federal Catalog?
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