NSN 5305-01-521-4844
High Torque Screw
Thread end to be identified w/black dye or paint.
Manufacturer part number BACB30NN4K39 for national stock number 5305015214844.
Datasheet
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Product description
Close Tolerance Screw NSN 5305-01-521-4844.
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MPN or Model
BACB30NN4K39
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Schedule B
8109.90.0000 (Zirconium and articles thereof nesoi) -
Thread Class
3a -
Thread Direction
Right-hand -
Thread Length
0.425 inches -
Fastener Length
2.750 inches -
Head Style
Flat countersunk -
Head Diameter
Between 0.465 inches and 0.510 inches -
Grip Diameter
0.250 inches -
Internal Drive Style
Cross recess type 1 -
End Application
Aircraft, b757 -
Thread Diameter
0.250 inches -
Grip Length
2.438 inches -
Thready Qty Per Inch (tpi)
28 -
Countersink Angle
Between 99.0 degrees and 101.0 degrees -
Material
Titanium alloy -
Surface Treatment
Aluminum -
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.
Pricing and Availability
Get a quote for 5305-01-521-4844 close tolerance screwManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
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BACB30NN4K39 | The Boeing Company |