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Closures & belt buckles

Four-Prong Snap / Spring Snap Fastener

A press-stud closure made of four stamped pieces - a cap, a socket, a stud and a post - that snap together through the fabric. Used on caps, jackets and sportswear. All four pieces are stamped and the post is set by cold heading, and Qinxi has no stamping or cold-heading line, so the complete fastener is sourced from the supply chain.

Overview

Made by
Supply chain / partners
Materials
Brass, Iron / low-carbon steel, Stainless steel
Finish options
Nickel, Nickel-free, Antique brass, Gunmetal, Black nickel, Matte brushed
Customization
Cap and socket diameter, Post length matched to fabric thickness, Cap face logo or plain, Plating matched to the hardware set

Applications

  • Baseball capsFront-panel snap or strapback detail
  • Bucket hats
  • Hoodies & sportswearPlacket or pocket snap
  • Coats & jacketsCuff, collar or storm-flap snap

Selection tips

  • Match the post length to the fabric build-up: too short and it will not clinch, too long and it pokes through the cap face.
  • Specify open and close force: too high and it is hard to operate, too low and it pops open in wear.
  • Nickel-free plating is needed for EU skin-contact items to meet REACH nickel-release limits.
  • Ferrous snaps trigger garment needle detectors; confirm on the buyer's detector for 100% needle-detected markets.

Manufacturing process & quality control points

Qinxi in-houseSupply chain / partnersIn-house or supply chain
  1. 1

    Stamping of the four pieces

    Supply chain / partners

    The cap, socket, stud and post are blanked and formed in a progressive die; the post is closed by cold heading. Qinxi has no stamping or cold-heading line, so this is done by the supply chain to the agreed diameter and plating.

    Quality control points

    • Piece dimension and cap/socket fit · Caliper and go/no-go gauge · Per lot, AQL 2.5 (ISO 2859-1 general level II)
  2. 2

    Plating

    Supply chain / partners

    Pieces are plated to the target colour. Plating is outsourced to the supply chain; coating thickness and corrosion are verified against the agreed specification.

    Quality control points

    • Coating thickness · XRF coating thickness gauge (ISO 3497 / ASTM B568) · One set per plating colour per batch
    • Corrosion resistance · Neutral salt spray, 5% NaCl, 35 C (ISO 9227 / GB/T 10125) · One sample set per batch
  3. 3

    Setting and snap test

    Supply chain / partners

    The cap and post are set through the production fabric and the snap is opened and closed at an agreed force. Supplied and tested by the supply chain, with Qinxi spot-checking on the actual garment build-up.

    Quality control points

    • Snap open/close force and retention · Snap gauge, open/close cycle x10 · Per lot, AQL 2.5 (ISO 2859-1 general level II)

Relevant compliance

Get a quote for four-prong snap / spring snap fastener

Custom shapes, finishes and logos. Email us your artwork or sample photos.

Request a quote