TX1026C4-12AF
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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.
3a thread class, 1.160 inches minimum and 1.190 inches maximum fastener length, right-hand thread direction, 0.425 inches nominal thread length, fillister 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
- 0.425 inches nominal
- Fastener Length
- 1.160 inches minimum and 1.190 inches maximum
- Head Style
- fillister countersunk
- Head Height
- 0.110 inches nominal
- Spline Major Diameter
- 0.221 inches nominal
- Grip Diameter
- 0.249 inches minimum and 0.250 inches maximum
- Internal Drive Style
- torx
- End Item Identification
- fighter aircraft (f18e/f)
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.740 inches minimum and 0.760 inches maximum
- Thread Quantity Per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 100.0 degrees maximum
- Part Name Assigned By Controlling Agency
- (inavy) screw,close tolerance
- Material
- steel corrosion resisting overall
- Surface Treatment
- aluminum overall
- Thread Series Designator
- unjf
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 |
|---|---|
| 11287C4-12AF | Close Tolerance Screw |
| 3M1169C4-12AF | Close Tolerance Screw |
| GS1006C4-12AF | Close Tolerance Screw |
| TX1026C4-12AF | Close Tolerance Screw |
| WC1169C4-12AF | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-541-5249?
Does the NSN 5305-01-541-5249 have a Schedule B code assigned?
Does NSN 5305-01-541-5249 require demilitarization?
Does NSN 5305-01-541-5249 contain precious materials?
Does NSN 5305-01-541-5249 contain hazardous materials?
When the NSN 5305-01-541-5249 was assigned to the Federal Catalog?
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