NSN 5305-01-020-2849
High Torque Screw
Between 1.702 inches and 1.732 inches fastener length, flat countersunk head style, between 0.625 inches and 0.635 inches head diameter, grip diameter: between 0.3115 inches and 0.3120 inches .
Manufacturer part number ST3M680-5D20 for national stock number 5305010202849.
Datasheet
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Product description
Close Tolerance Screw NSN 5305-01-020-2849.
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MPN or Model
ST3M680-5D20
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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
0.467 inches -
Fastener Length
Between 1.702 inches and 1.732 inches -
Head Style
Flat countersunk -
Head Diameter
Between 0.625 inches and 0.635 inches -
Grip Diameter
Between 0.3115 inches and 0.3120 inches -
Shank Unthreaded Hole Diameter
0.076 inches first hole and 0.081 inches first hole -
Internal Drive Style
High-torque -
Thread Diameter
0.3125 inches -
Grip Length
Between 1.240 inches and 1.260 inches -
Thready Qty Per Inch (tpi)
24 -
Countersink Angle
100.0 degrees -
Distance From Head Largest Bearing Surface To Shank Hole Center
1.588 inches first hole and 1.608 inches first hole -
Material
Stainless steel -
Surface Treatment
Passivate -
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 5305-01-020-2849 close tolerance screwManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
---|---|
ST3M680-5D20 | Boeing Company, The |
HT4036-5D20 | Hi-shear Corporation |
HT4036-5D20 | Sps Technologies, Llc |
HT4036-5D20 | Alcoa Global Fasteners, Inc. |
HT4036-5D20 | Lisi Aerospace Canada Corp |
HT4036-5D20 | Huck International, Inc. |
HT4036-5D20 | Alcoa Fastening Systems |
HT4036-5D20 | Sps Technologies, Llc |
HT4036-5D20 | Satair A/s |
HT4036-5D20 | Huck Intl Inc |
Stock Check
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