• Drilled Hexagon Screws
  • Nominal Size. Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • Screws. Drilled hexagon socket head cap screws shall conform to the respective dimensions and requirements set forth.
  • Number of Holes. Screws shall have 2, 4, or 6 holes drilled in the head as designated by the purchaser. For sizes 6 (0.138 in.) and smaller, the use of only 2 holes is recommended.
  • Holes. Hole size and location from the top of the head shall conform to the specifications given in this table. For sizes 8 (0.164 in.) and larger, the drilled hole shall lie within the flats of the hexagon socket and not break through the socket corners. Positioning of holes on opposite sides of the socket shall be such that the hole alignment check plug will pass completely through the head on all screw sizes.
    For commercial quality screws, the edge of the holes on the outside of the head may be chamfered or broken. The edge of the holes within the socket may contain burrs to the extent that the socket will accept a key having the standard minimum width across the flats and the holes must allow the Type I drill check plug to pass from the outside of the head into the socket.
    For aircraft quality screws, the edge of the holes on the outside of the head shall be chamfered and there shall be no burr chips or slivers that might become dislodged during usage. The socket shall accept a key having the standard.
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Item #

Description

Nominal Size or Basic Screw Dia.

Number (U)

Basic (U)

Max. (V)

Min. (W)

Basic (Type I)

N/A Drilled Hexagon Socket Head Cap Screw, 0.1120" Nominal Dia. N/A No. 4 N/A 65 N/A 0.0350 in N/A 0.040 in N/A 0.008 in N/A 0.030 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.1250" Nominal Dia. N/A No. 5 N/A 65 N/A 0.0350 in N/A 0.045 in N/A 0.012 in N/A 0.030 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.1380" Nominal Dia. N/A No. 6 N/A 65 N/A 0.0350 in N/A 0.050 in N/A 0.018 in N/A 0.030 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.1640" Nominal Dia. N/A No. 8 N/A 56 N/A 0.0465 in N/A 0.060 in N/A N/A 0.035 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.1900" Nominal Dia. N/A No. 10 N/A 56 N/A 0.0465 in N/A 0.065 in N/A N/A 0.035 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.2500" Nominal Dia. N/A 1/4 in N/A 56 N/A 0.0465 in N/A 0.085 in N/A N/A 0.035 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.3125" Nominal Dia. N/A 5/16 in N/A 56 N/A 0.0465 in N/A 0.104 in N/A N/A 0.035 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.3750" Nominal Dia. N/A 3/8 in N/A 52 N/A 0.0635 in N/A 0.123 in N/A N/A 0.052 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.4375" Nominal Dia. N/A 7/16 in N/A 52 N/A 0.0635 in N/A 0.141 in N/A N/A 0.052 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.5000" Nominal Dia. N/A 1/2 in N/A 52 N/A 0.0635 in N/A 0.160 in N/A N/A 0.052 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.6250" Nominal Dia. N/A 5/8 in N/A 52 N/A 0.0635 in N/A 0.198 in N/A N/A 0.052 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.7500" Nominal Dia. N/A 3/4 in N/A 42 N/A 0.0935 in N/A 0.235 in N/A N/A 0.082 in
N/A Drilled Hexagon Socket Head Cap Screw, 0.8750" Nominal Dia. N/A 7/8 in N/A 42 N/A 0.0935 in N/A 0.273 in N/A N/A 0.082 in
N/A Drilled Hexagon Socket Head Cap Screw, 1.0000" Nominal Dia. N/A 1 in N/A 42 N/A 0.0935 in N/A 0.310 in N/A N/A 0.082 in
N/A Drilled Hexagon Socket Head Cap Screw, 1.1250" Nominal Dia. N/A 1-1/8 in N/A 31 N/A 0.1200 in N/A 0.348 in N/A N/A 0.109 in
N/A Drilled Hexagon Socket Head Cap Screw, 1.2500" Nominal Dia. N/A 1-1/4 in N/A 31 N/A 0.1200 in N/A 0.385 in N/A N/A 0.109 in
N/A Drilled Hexagon Socket Head Cap Screw, 1.3750" Nominal Dia. N/A 1-3/8 in N/A 31 N/A 0.1200 in N/A 0.423 in N/A N/A 0.109 in
N/A Drilled Hexagon Socket Head Cap Screw, 1.5000" Nominal Dia. N/A 1-1/2 in N/A 31 N/A 0.1200 in N/A 0.460 in N/A N/A 0.109 in
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