HT4057-3-12
View detailed technical data, stock status, and sourcing information for: HT4057-3-12
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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.
3a thread class, right-hand thread direction, flat countersunk head style, 1.141 inches minimum and 1.171 inches maximum fastener length, 0.381 inches minimum and 0.431 inches maximum thread length
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
- 0.381 inches minimum and 0.431 inches maximum
- Fastener Length
- 1.141 inches minimum and 1.171 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.338 inches minimum and 0.381 inches maximum
- Grip Diameter
- 0.1885 inches minimum and 0.1895 inches maximum
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.190 inches
- Grip Length
- 0.740 inches minimum and 0.760 inches maximum
- Features Provided
- cetyl alcohol lubricant
- Thread Quantity Per Inch
- 32
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Material
- steel comp xm-13 overall
- Material Document And Classification
- ams5629 assn std single material response overall
- Surface Treatment
- aluminum and chromate overall
- Surface Treatment Document And Classification
- mil-c-83488,type 2,class 3 mil spec single treatment response 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 |
|---|---|
| 11935-3L12 | Close Tolerance Screw |
| CHT4057-3-12 | Close Tolerance Screw |
| HT4057-3-12 | Close Tolerance Screw |
| HT4057-3-12A | Close Tolerance Screw |
| ST3M733-3-12 | Close Tolerance Screw |
| ST3M733-3L12 | Close Tolerance Screw |
| WC4057-3-12 | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-191-4595?
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Does NSN 5305-01-191-4595 require demilitarization?
Does NSN 5305-01-191-4595 contain precious materials?
Does NSN 5305-01-191-4595 contain hazardous materials?
When the NSN 5305-01-191-4595 was assigned to the Federal Catalog?
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