5305-01-286-4291
Find complete technical information, availability, and procurement data for: 5305-01-286-4291
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An externally threaded fastener whose unthreaded portion is of a specified 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. 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. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.
right-hand thread direction, 0.500 inches minimum and 0.506 inches maximum thread length, 3a thread class, 4.250 inches minimum and 4.256 inches maximum fastener length, flat chamfer 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
- 0.500 inches minimum and 0.506 inches maximum
- Fastener Length
- 4.250 inches minimum and 4.256 inches maximum
- Head Style
- flat chamfer
- Head Diameter
- 0.553 inches minimum and 0.562 inches maximum
- Head Height
- 0.244 inches minimum and 0.250 inches maximum
- Shoulder Diameter
- 0.371 inches minimum and 0.373 inches maximum first shoulder
- Shoulder Length
- 4.000 inches nominal first shoulder
- Spline Minor Diameter
- 0.188 inches nominal
- Spline Major Diameter
- 0.219 inches nominal
- Spline Width
- 0.048 inches nominal
- Internal Drive Style
- six spline
- Nominal Thread Diameter
- 0.312 inches
- Thread Quantity Per Inch
- 18
- Shoulder Shape
- round first shoulder
- Material
- steel comp 1212 overall
- Material Document And Classification
- qq-s-637 fed spec single material response overall
- Thread Series Designator
- unc
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 |
|---|---|
| MS21301-24 | Shoulder Screw |
FAQs
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