MS24674 screw — cylindrical socket head cap, drilled for safety wire (plain or knurled)

Notes from the standard

• Threads per MIL-S-7742 (as printed); acceptability: complete (full form) threads within two threads of the head, measured with a thread ring gage, on screws above the heavy line in the length table (rows with threaded_to_head = true). Rows below the heavy line carry the maximum grip length LG and minimum body length LB.
• Head may or may not be knurled at the manufacturer's option; type of knurling optional. Diameter of a knurled head must not exceed the maximum head diameter.
• Drilled hole data: screw #6 (.138) has one (1) hole drilled through the head, centered as close as practicable on a flat of the hexagon socket; screws #8 (.164) and larger have three (3) holes within the flats of the socket that shall not break the corners of the hexagon socket.
• Edges of the holes on the outside of the head are chamfered 45 degrees by 0.010 to 0.020 deep.
• Alignment plug (Table I) shall pass completely through the head without deflection.
• Tensile strength: loads in pounds based on 80,000 psi minimum ultimate tensile strength, calculated from the stress areas indicated in FED-STD-H28.
• Magnetic permeability: 2.0 max (air = 1.0) at a field strength H = 200 oersteds; indicator per ASTM A 342 (Amendment 1, 19 Apr 1996, replaced MIL-I-17214).
• Dimensions in inches unless otherwise specified. For design-feature purposes this standard takes precedence over the procurement documents referenced herein.
• Scanned sheet: lengths per dash were assigned by row position in the length column (dash numbers print slightly offset from their length rows); grip LG/LB values are read as printed (two decimals).