5305-01-261-1899
Find complete technical information, availability, and procurement data for: 5305-01-261-1899
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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.
1.056 inches minimum and 1.076 inches maximum fastener length, 0.306 inches minimum and 0.326 inches maximum thread length, right-hand thread direction, 3a thread class, 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.306 inches minimum and 0.326 inches maximum
- Fastener Length
- 1.056 inches minimum and 1.076 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.499 inches minimum and 0.507 inches maximum
- Grip Diameter
- 0.264 inches minimum and 0.265 inches maximum
- Internal Drive Style
- offset cruciform (torque set)
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.740 inches minimum and 0.760 inches maximum
- Thread Quantity Per Inch
- 28
- Countersink Angle
- 100.0 degrees nominal
- Special Features
- 0.0156 in. oversize shank for repair work only
- Material
- steel comp 4340 or steel comp 4140 or steel comp 8740 overall
- Material Document And Classification
- mil-s-5000 mil spec 1st material response or mil-s-5626 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response overall
- Surface Treatment
- chromium overall
- Surface Treatment Document And Classification
- qq-p-416,type 2,class 2 fed spec single treatment response overall
- Thread Series Designator
- unjc
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 |
|---|---|
| 51B334-12X | Close Tolerance Screw |
FAQs
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