51B219-14
View detailed technical data, stock status, and sourcing information for: 51B219-14
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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, pan head style, 0.246 inches minimum and 0.323 inches maximum thread length, 1.136 inches minimum and 1.183 inches maximum fastener 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
- 0.246 inches minimum and 0.323 inches maximum
- Fastener Length
- 1.136 inches minimum and 1.183 inches maximum
- Head Style
- pan
- Head Diameter
- 0.258 inches minimum and 0.276 inches maximum
- Head Height
- 0.074 inches minimum and 0.086 inches maximum
- Grip Diameter
- 0.1365 inches minimum and 0.1375 inches maximum
- Internal Drive Style
- offset cruciform (torque set)
- Nominal Thread Diameter
- 0.138 inches
- Grip Length
- 0.860 inches minimum and 0.890 inches maximum
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell c minimum and 43.0 rockwell c maximum overall
- Surface Finish
- 32.0 microinches grip
- Material
- steel comp 4140 or steel comp 4340 or steel comp 8740 overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416,ty 2,cl 2 fed spec single treatment response overall
- Thread Series Designator
- unc
- Specification/Standard Data
- 76823-51b219 manufacturers standard
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 |
|---|---|
| 51B219-14 | Close Tolerance Screw |
FAQs
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