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cap screw

cap screw

6.6
A screw with a finished head that you screw into a threaded hole to hold machine parts together
  • noun
  • /kæp skru/
  • Specialized
translation icon : tornillo de cabeza
  • During the maintenance check, all the cap screws were found to be tightened adequately.
  • hex-head cap screw
  • head cap screw
  • commercial cap-screw

Examples

  • The commercial hex-head cap-screw pitch-diameter evaluation showed that, by either system 21 or system 22, the 2A undersize condition was detected.

    Academic text (1996)
  • The pitch diameter size of the ASTM A354 grade BD cap screws correlated with the tensile strength.

    Academic text (1996)
  • Two-piece balancing gear clamps have been made of two separate hubs held together by two supplied cap screws.

    Academic text (1994)
  • Each one consists of three principal components: a round threaded nut, a hardened washer, and a collection of cap screws that ring the face of the nut.

    Academic text (2001)
  • The lots of hex-head cap screws were wedge-tensile tested, and each lot of hex nuts was proof-load tested in accordance with ASTM F606.

    Academic text (1996)
  • Table 1. Aerospace nut pitch diameters. Table 2. Minimum tensile strength versus minor and pitch diameters. Table 3. Commercial hex head cap screw. Table 4. Commercial torque-tension results.

    Academic text (1996)
  • The engineer recommended using cap screws to secure the components in place.

  • To assemble the machine, you need to insert several cap screws into the designated holes.

Synonyms

screw
vscap screw
85 1.2

A small metal piece with a spiral thread that holds things together when turned into wood or metal

is a specific finished-head fastener made for threaded holes in parts
machine screw
vscap screw
  • Specialized
1 3.7

A metal screw with the same width along its length used with a nut or in a threaded hole

has a finished head rather than a slotted one

Surface Forms

cap screw singular
cap screws plural

Morphology

cap + screw

The compound is directly compositional: 'cap' (a head/cover) + 'screw' (a threaded fastener) yields a screw with a finished/headed top. This noun+noun formation matches common English compounding patterns and is predictable to a learner who knows both constituent meanings, so it is transparent.

Etymology

Cap screw is a name for a screw that has a 'finished head' like a little cap. Picture a screw with a neat 'cap' on top that you drive into a hole made to fit it; because of that capped head it is used to 'hold machine parts together'.