NSN 5305-01-321-6681
High Torque Screw
Between 0.511 inches and 0.541 inches fastener length, flat chamfer head style, between 0.221 inches and 0.226 inches head diameter, head height: between 0.074 inches and 0.086 inches .
Manufacturer part number NAS1121-4 for national stock number 5305013216681.
Datasheet
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Product description
Close Tolerance Screw NSN 5305-01-321-6681.
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MPN or Model
NAS1121-4
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Schedule B
7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment) -
NMF (National Motor Freight)
093486 - Bolts, Nuts Or Screws, NOI (sub 3) -
Unit Weight (Est.)
0.1 lb -
Thread Class
3a -
Thread Direction
Right-hand -
Thread Length
0.276 inches -
Fastener Length
Between 0.511 inches and 0.541 inches -
Head Style
Flat chamfer -
Head Diameter
Between 0.221 inches and 0.226 inches -
Head Height
Between 0.074 inches and 0.086 inches -
Grip Diameter
Between 0.1365 inches and 0.1375 inches -
Internal Drive Style
Offset cruciform (torque set) -
Thread Diameter
0.138 inches -
Grip Length
Between 0.240 inches and 0.260 inches -
Thready Qty Per Inch (tpi)
32 -
Min. Tensile Strength (psi)
160000 pounds per square inch -
Hardness Rating
36.0 rockwell c and 40.0 rockwell c -
Surface Finish
32.0 microinches threads -
Material
Steel comp 4140 or steel comp e4340 or steel comp 8740 -
Material Specification
Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-6049 military specification 3rd material response -
Surface Treatment
Cadmium and chromate -
Surface Treatment Specification
Qq-p-416, type 2, class 2 federal specification single treatment response -
Thread Series Designator
Unjc -
Specification Data
80205-nas1122 professional/industrial association standard
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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 5305-01-321-6681 close tolerance screwManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
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NAS1121-4 | National Aerospace Standards |