NSN 5305-01-047-6251
High Torque Screw
Between 0.550 inches and 0.597 inches fastener length, flat countersunk head style, between 0.451 inches and 0.507 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .
Manufacturer part number 51B234-4 for national stock number 5305010476251.
Datasheet
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Product description
Close Tolerance Screw NSN 5305-01-047-6251.
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MPN or Model
51B234-4
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Schedule B
7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment) -
Thread Class
3a -
Thread Direction
Right-hand -
Thread Length
Between 0.290 inches and 0.357 inches -
Fastener Length
Between 0.550 inches and 0.597 inches -
Head Style
Flat countersunk -
Head Diameter
Between 0.451 inches and 0.507 inches -
Grip Diameter
Between 0.2485 inches and 0.2495 inches -
Internal Drive Style
Offset cruciform (torque set) -
Thread Diameter
0.250 inches -
Grip Length
Between 0.240 inches and 0.260 inches -
Thready Qty Per Inch (tpi)
28 -
Min. Tensile Strength (psi)
180000 pounds per square inch -
Hardness Rating
39.0 rockwell c and 43.0 rockwell c -
Countersink Angle
100.0 degrees -
Material
Steel comp e4340 or steel comp 4340 or steel comp 4140 or steel comp 8740 -
Material Specification
Mil-s-5000 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-5626 military specification 3rd material response or mil-s-6049 military specification 4th material response -
Thread Series Designator
Unjf
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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.
![Mechanic Bill explains High Torque Screw](/public/images/billy-thinking.png)
Pricing and Availability
Get a quote for 5305-01-047-6251 close tolerance screwManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
---|---|
51B234-4 | Northrop Grumman Technical Services, |
51B234-4 | Northrop Grumman Systems Corporation |
Stock Check
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