The 12 mm Bra Strap Adjustment Buckle Hook and Loop set is a three-piece zinc alloy (zamak) bra hardware kit that lets you adjust the length of a bra strap and attach the strap to the bra body. It is made for 12 mm class straps and is used by bra and lingerie manufacturers, underwear workshops and producers in other strap-adjustment applications such as car seat covers.
What Is a 12 mm Bra Strap Adjuster Set and What Does It Include?
The set combines the three metal parts needed to finish a bra strap:
- Strap adjuster (slider): sets the strap length. The strap opening is 11.5 mm / 0.45 in and the outer size is 9.6 x 13.7 mm.
- Ring: 11.5 mm in diameter, used at the turning point where the strap connects to the bra body.
- Bra hook: 11.5 mm, used for a detachable strap connection.
Because all three parts share the same size group and material, the finished strap looks consistent and the strap runs smoothly through each component. Besides bra production, the set is also used in underwear production and in car seat covers and other products that need an adjustable strap.
Technical Specifications
| Product type | 3-piece bra hardware set (strap adjuster, hook, ring) |
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| Size class | 12 mm |
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| Strap adjuster opening | 11.5 mm / 0.45 in |
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| Strap adjuster outer size | 9.6 x 13.7 mm / 0.38 x 0.54 in |
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| Ring diameter | 11.5 mm / 0.45 in |
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| Hook size | 11.5 mm / 0.45 in |
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| Material | Zinc alloy (zamak) |
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| Standard finish | Nickel |
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| Minimum order | 100 sets |
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Choosing the Right Set by Strap Width and Finish
Strap width: This set is designed for 12 mm class straps, with an 11.5 mm strap opening. For narrower straps choose the 10 mm bra strap adjuster set, and for wider straps the 15 mm bra strap adjuster set. The strap should neither float nor bunch inside the slider, so measure the actual strap you plan to use before ordering.
Finish: Nickel is the standard finish offered online. Other plating colors such as light gold, black nickel, gunmetal and chrome can be prepared on request; contact us for bulk plating orders.
Sampling: Before bulk production, test the set on a few samples made with the real strap and fabric to confirm that the slider adjusts smoothly, the hook opens and closes easily, and the parts sit neatly on the strap.
Bulk Orders
The minimum order is 100 sets, and tiered pricing applies above 3,000 and 7,500 pieces; current prices are shown in the quantity table on the product page. For related parts, browse Bra Rings, Hooks and Strap Adjustment Buckles.
Frequently Asked Questions
What parts are included in the set?
Each set contains one strap adjuster, one bra hook and one ring. All three parts are made of zinc alloy and belong to the same size group.
Which strap width does this set fit?
It fits 12 mm class straps; the strap adjuster opening is 11.5 mm / 0.45 in. Separate sets are available for 10 mm and 15 mm straps.
What are the dimensions of the parts?
The strap adjuster has an 11.5 mm opening and a 9.6 x 13.7 mm outer size, the ring is 11.5 mm in diameter and the hook is 11.5 mm.
Are other colors or finishes available?
Nickel is the standard finish. Light gold, black nickel, gunmetal and chrome can be plated on request; contact us for bulk orders.
Where else is this set used besides bras?
It is also used in underwear production and in applications that need an adjustable strap, such as car seat covers.
What is the minimum order quantity?
The minimum order is 100 sets, with tiered pricing above 3,000 and 7,500 pieces.