Connection Guide · Other connections

Hook-and-Loop Textile Closure

A hook-and-loop (Velcro-type) fastener: a textile tape face covered in small hooks pressed against a face of soft loops, so the two overlapping surfaces grip and can be peeled apart and re-closed many times. On a cinch strap, the strap overlaps itself (one side hook, the other loop).

Illustration of a Hook-and-Loop Textile Closure
Stands for
Descriptive name: 'hook' and 'loop' are the two mating textile faces; VELCRO is the best-known brand (from French velours + crochet).
Gender
both
Connects by
contact, friction, other, adhesive, snap-fit, clamp
Standards
A-A-55126 (US commercial item description, hook and loop fastener tapes); ASTM D5169 (shear strength test); ASTM D5170 (peel strength test); MIL-DTL-21840 (US military hook-and-loop fastener tapes)
Regions
worldwide

How it connects

The faces are pressed together over an overlap; hooks catch the loops and hold in shear, released by peeling. No seal; holding force scales with overlap area. Reusable for many cycles.

Male and female halves

Two halves: the hook (stiff, scratchy) side and the loop (soft, fuzzy) side. Back-to-back tape has hook on one face and loop on the other, so a single strap mates with itself; self-engaging/hook-to-hook types are genderless.

Usually connects to

  • Complementary hook or loop face, on another strip/flap or the same strap
  • Itself on back-to-back/One-Wrap tape around a cable, cord or hose bundle
  • Compatible cinch buckle or D-ring

Common sizes

  • Tape widths about 3/8–4 in (10–100 mm), commonly 1/2, 5/8, 3/4, 1, 1.5 or 2 in; sold as strips, dots/coins, wraps and rolls cut to length.
  • Strap widths commonly 0.5–2 in (12.7–50.8 mm), lengths 6–48 in (150–1200 mm). One example is 24 in × 1-1/4 in (31.75 mm).
  • For bundles, check usable adjustable circumference as well as strap width/length.

Where it is used

cable and hose bundling; industrial hose and wire bundling; cable managementapparel and footwearbags and strapsmedical bracesupholstery and coversWall mountingHome and office organizationSecuring removable objects; audio/visual and stage wiring; telecommunications and networking

Variations

  • Sew-on or adhesive-backed tape
  • Back-to-back/One-Wrap strap
  • Plastic/metal ring or buckle cinch
  • Elastic/premade cinch or cut-to-length strap kit
  • Self-engaging hook/mushroom-head closure, such as VELCRO LOK or 3M Dual Lock

How to recognise it

A flat woven tape strip; one face shows a dense field of small plastic hooks (rough to touch), the other a fuzzy pile of loops. Cinch straps often have a plastic buckle or slot at one end and are wrapped so the strap overlaps itself.

Often confused with

Confused withHow to tell them apart
Snap fastener / press studSnaps are discrete metal or plastic studs at points; hook and loop is a continuous fuzzy/scratchy textile surface.
Reclosable mushroom fastener (3M Dual Lock)Dual Lock has rigid plastic mushroom stems on both sides that click together audibly; hook and loop has a soft loop side.
Standard cable tie (zip tie)Zip ties are single-use ratcheting plastic straps; hook-and-loop cinch straps are reusable fabric fasteners with a buckle.
One-piece slotted hook-and-loop cable tieSlotted ties pass through a punched fabric slit rather than an integrated rigid plastic or metal cinch buckle/ring.
Carabiner connectionThe carabiner is a separate gated hook; this interface is the flexible loop around the bundle.

Also called

touch fastenerback-to-back (one-wrap) hook and loop; sticky-back hook-and-loop tapeself-adhesive hook-and-loop fastenerhook and loop cinch strap; hook-and-loop cable strap; cinch-ring cable straphook-and-loop cable tie with bucklereusable bundling strapburr fastenerVelcro closure

Good to know

Not a rigid or sealing connection, and not a fitting or port in the usual sense. The connection is the overlap between hook and loop faces; on the sample part (1.5 in back-to-back cinch tape) it is genderless because the strap mates with itself. Holding force depends on how much overlaps, not on a fixed geometry.

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