E128-5-9
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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.
1.078 inches minimum and 1.125 inches maximum fastener length, 0.506 inches minimum and 0.573 inches maximum thread length, flat countersunk head style, right-hand thread direction, 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
- 0.506 inches minimum and 0.573 inches maximum
- Fastener Length
- 1.078 inches minimum and 1.125 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.629 inches minimum and 0.634 inches maximum
- Grip Diameter
- 0.3115 inches minimum and 0.3120 inches maximum
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 0.552 inches minimum and 0.572 inches maximum
- Thread Quantity Per Inch
- 24
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 24.0 rockwell c minimum and 35.0 rockwell c maximum overall
- Minimum Yield Strength
- 85000 pounds per square inch
- Countersink Angle
- 100.0 degrees nominal
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- iron alloy 660 overall
- Surface Treatment
- passivate overall
- Surface Treatment Document And Classification
- qq-p-35 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 5305-01-152-5623?
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Does NSN 5305-01-152-5623 require demilitarization?
Does NSN 5305-01-152-5623 contain precious materials?
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When the NSN 5305-01-152-5623 was assigned to the Federal Catalog?
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