NSN 5305-01-521-9172
High Torque Screw
Between 0.828 inches and 0.858 inches fastener length, flat countersunk head style, 0.477 inches head diameter, grip diameter: between 0.3115 inches and 0.3120 inches .
Manufacturer part number ST3M557-5-5 for national stock number 5305015219172.
Datasheet
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Product description
Close Tolerance Screw NSN 5305-01-521-9172.
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MPN or Model
ST3M557-5-5
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Schedule B
7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)) -
NMF (National Motor Freight)
096640 - Screws, Iron Or Steel -
Thread Class
3a -
Thread Direction
Right-hand -
Thread Length
0.531 inches -
Fastener Length
Between 0.828 inches and 0.858 inches -
Head Style
Flat countersunk -
Head Diameter
0.477 inches -
Grip Diameter
Between 0.3115 inches and 0.3120 inches -
Internal Drive Style
High-torque -
End Application
Fwd fuselage -
Thread Diameter
0.312 inches -
Grip Length
Between 0.302 inches and 0.322 inches -
Thready Qty Per Inch (tpi)
24 -
Countersink Angle
Between 99.0 degrees and 101.0 degrees -
Material
Nickel alloy 718 -
Material Specification
Ams5662 assn standard single material response -
Surface Treatment
Passivate -
Surface Treatment Specification
Qq-p-35 federal specification single treatment 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 5305-01-521-9172 close tolerance screwManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
---|---|
ST3M557-5-5 | Boeing Company, The |
HT4027-5-5 | Arconic Global Fasteners & Rings, |
ST3M557-5-5 | Fastener Innovation Technology, Inc. |
HT4027-5-5 | Sps Technologies, Llc |
ST3M557 | Boeing Company, The |
ST3M557-5-5 | Twist Tite Mfg, Inc |
Stock Check
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- NE: 934