AIC551C-04-179
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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, 2a thread class, 0.344 inches minimum and 0.374 inches maximum fastener length, 0.174 inches minimum and 0.234 inches maximum thread 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
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.174 inches minimum and 0.234 inches maximum
- Fastener Length
- 0.344 inches minimum and 0.374 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.166 inches nominal
- Shoulder Diameter
- 0.115 inches minimum and 0.116 inches maximum first shoulder
- Shoulder Length
- 0.113 inches minimum first shoulder
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.112 inches
- Thread Quantity Per Inch
- 40
- Hardness Rating
- 33.0 rockwell c minimum and 37.0 rockwell c maximum overall
- Countersink Angle
- 100.0 degrees nominal
- Shoulder Shape
- round first shoulder
- Part Name Assigned By Controlling Agency
- navy special project
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 |
|---|---|
| 2R1862-5 | Shoulder Screw |
| AIC551C-04-179 | Shoulder Screw |
| BM19069-04-179 | Shoulder Screw |
| GS551C04-179 | Shoulder Screw |
| PBF1285-04-179 | Shoulder Screw |
FAQs
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What is the FSCG of the NSN 5305-01-134-8725?
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When the NSN 5305-01-134-8725 was assigned to the Federal Catalog?
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