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NSN 5305-00-527-4245

Panel Assembly Fastener

About this product

0.190 inches fastener length, flat countersunk head style, between 0.161 inches and 0.167 inches head diameter, shoulder diameter: 0.106 inches first shoulder.

Manufacturer part number 639-21 for national stock number 5305005274245.

Datasheet

  • Product description

    Shoulder Screw NSN 5305-00-527-4245.

  • MPN or Model

    639-21

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    096630 - Screws NOI Brass/bronze/copper
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.097 inches
  • Fastener Length
    0.190 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.161 inches and 0.167 inches
  • Shoulder Diameter
    0.106 inches first shoulder
  • Shoulder Length
    0.060 inches first shoulder
  • Internal Drive Style
    Cross recess type 1
  • Thread Diameter
    0.086 inches
  • Thready Qty Per Inch (tpi)
    64
  • Countersink Angle
    82.0 degrees
  • Shoulder Shape
    Round first shoulder
  • Material
    Steel comp 1213
  • Material Specification
    Qq-s-633 federal specification single material response
  • Thread Series Designator
    Unf
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Shoulder Screw

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes bolt, internal wrenching and screw, cap, socket head.

Mechanic Bill explains Panel Assembly Fastener

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NSN 5305005274245

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
639-21 Kollsman, Inc.
639-21 Kollsman, Inc.
639-21 Kollsman, Inc.
639-21 Kollsman, Inc.
639-21 Kollsman, Inc.
639-21 Kollsman, Inc.
Stock Check
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