51B293-2
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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, 0.385 inches minimum and 0.432 inches maximum fastener length, 3a thread class, 0.219 inches minimum and 0.317 inches maximum 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
- 0.219 inches minimum and 0.317 inches maximum
- Fastener Length
- 0.385 inches minimum and 0.432 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.375 inches minimum and 0.387 inches maximum
- Grip Diameter
- 0.1885 inches minimum and 0.1895 inches maximum
- Internal Drive Style
- offset cruciform (torque set)
- Nominal Thread Diameter
- 0.190 inches
- Grip Length
- 0.115 inches minimum and 0.135 inches maximum
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 180000 pounds per square inch
- Countersink Angle
- 100.0 degrees nominal
- Surface Finish
- 32.0 microinches grip
- Special Features
- aluminum grommet 0.012 in. thk on bearing surface of head
- Material
- steel comp 430fse or steel comp 81b45 or steel comp 4140 or steel comp 302b overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416 ty 2 cl 3 fed spec single treatment response overall
- Thread Series Designator
- unf
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FAQs
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What is the FSCG of the NSN 5305-00-105-8672?
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Does NSN 5305-00-105-8672 contain precious materials?
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When the NSN 5305-00-105-8672 was assigned to the Federal Catalog?
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