Externally Threaded Labrets: Steel Flat Back Studs in 8G Through 18G
Metal Mafia externally threaded labrets bring implant-grade 316L steel and a clean flat disc back to healed lip, tragus, helix, and cartilage piercings. This collection of externally threaded labrets spans 8G through 18G with complete labrets, post-only options, and styles from plain ball to black PVD. Every externally threaded labret here is machined to consistent thread tolerances for reliable daily wear.
What Is an Externally Threaded Labret?
An externally threaded labret is a flat back body jewelry post with three components: a flat disc that rests flush against the inside of the piercing, a straight steel post, and a decorative end that screws onto the front of the post. The threading in this system is cut into the exterior of the small pin on the decorative end, which screws into the open tip of the post. This keeps the disc side smooth and flat while the front presents whatever end style you choose, whether a plain ball, gem, spike, or shaped top.
Externally Threaded vs. Internally Threaded Labrets
The threading system determines how the decorative end attaches to the post and how much hardware contacts the piercing channel during jewelry changes.
Externally Threaded:
- Screw threads are cut into the outside of the end pin
- Threaded surface passes through the post tip to attach
- Compatible only with externally threaded posts of the same gauge
- Appropriate for fully healed piercings where jewelry changes are infrequent
- More affordable than internally threaded alternatives
- Ball ends can be swapped for any compatible externally threaded end
Internally Threaded:
- Threading is recessed inside the decorative end, post tip remains smooth
- No exposed thread ridges contact tissue during jewelry changes
- APP-recommended for both initial and healed piercings
- Compatible only with internally threaded posts
- Preferred by professional piercers for fresh and sensitive placements
Externally threaded ends are not compatible with internally threaded posts, and internally threaded ends will not seat correctly on externally threaded posts. Confirming which system your current post uses before ordering prevents compatibility issues entirely.
Complete Labret vs. Post Only
This collection includes two product types. A complete labret comes with the post and a ball end already paired, ready to wear immediately. A post-only listing includes only the flat disc back post with no decorative end. Post-only options are the right choice when you already have externally threaded ends you want to use, when you need a spare post for an existing setup, or when you prefer to buy ends separately to mix and match styles without replacing the full piece each time.
Externally Threaded Labret Styles in This Collection
Every Metal Mafia externally threaded labret in this collection is machined from 316L implant-grade stainless steel. Variation across the lineup of externally threaded labrets comes from end style, surface finish, and gauge rather than from any difference in base material quality.
Plain Ball End Labrets
High-polish steel ball ends are the most widely purchased labret style and the most universally compatible option in this collection. Available across the full gauge range from 8G through 18G, plain ball end labrets deliver a clean, symmetrical look that suits every placement from a standard labret chin piercing to a tragus or helix stud. The ball end unscrews counterclockwise for replacement with any compatible externally threaded end of the same gauge.
Gem and Crystal End Labrets
Gem-end externally threaded labrets replace the plain ball with a CZ stone in a bezel or prong setting, adding sparkle without changing the labret post format. Clear CZ and colored stone options appear in this collection primarily in 14G and 16G, covering the most common gauge range for lip and ear placements. Gem-end labrets are a consistent choice for Monroe, philtrum, and tragus piercings where the front-facing end is the primary visible element.
Spike and Cone End Labrets
Tapered spike and cone ends shift the aesthetic from rounded to angular. Metal Mafia spike-end externally threaded labrets are available in high-polish steel and black PVD finishes at 14G and 16G. This style is consistently popular for tragus, helix, and labret placements where a sharper end complements adjacent jewelry in a curated ear setup or facial piercing arrangement.
Black PVD Coated Labrets
Physical vapor deposition coating bonds a black finish to the 316L steel surface at a molecular level, producing a result that is significantly more durable than standard plating. Black PVD Metal Mafia externally threaded labrets maintain their finish under daily wear, repeated cleaning, and exposure to water and sweat in a way that electroplated alternatives cannot match. The black finish is particularly popular for tragus and helix placements where a darker tone creates a deliberate contrast within a curated ear look.
See more: Steel Externally Threaded Ends
Piercing Placements for Externally Threaded Labrets
The name "labret" originally referred to a specific lip placement below the lower lip center, but the flat back post of an externally threaded labret works across a much wider range of piercings than the name suggests. Any piercing that benefits from a flush-sitting back with a decorative front can be served by an externally threaded labret post.
Lip and Facial Piercings
Externally threaded labrets are the standard post style for the labret chin placement, Monroe, philtrum, and Medusa piercings. The flat disc back sits comfortably against the interior tissue of the lip without the gum pressure that a ball back or butterfly back creates. Post length is more critical here than in ear placements because lip tissue depth varies significantly between individuals. Most healed lip placements use 5/16 inch (8mm) or 3/8 inch (10mm) post lengths. A 16G or 14G gauge covers the majority of standard facial placements.
Ear Cartilage Piercings
Tragus, helix, conch, forward helix, and flat piercings all commonly use externally threaded labret posts because the flat disc back sits flush behind the cartilage without pressing during sleep or catching on hair. A 16G post at 1/4 inch (6mm) or 5/16 inch (8mm) covers the majority of healed cartilage placements. The flat back design makes Metal Mafia externally threaded labrets particularly practical for people with multiple ear piercings who want a uniform post style across different placements.
Large Gauge Placements (8G to 12G)
The large gauge range in this collection, from 8G through 12G, addresses a segment that most general jewelry retailers do not stock for externally threaded labrets. These sizes serve people whose labret, lip, or cartilage placements have been stretched beyond standard gauge, as well as those with piercings originally done at larger gauges for stylistic preference. Metal Mafia produces these externally threaded labrets in 12G, 10G, and 8G with a 5mm flat disc back and a 4mm ball end, maintaining the same 316L implant-grade steel standard as the smaller gauge lineup.
See more: Steel Externally Threaded Labrets Post Only
Sizing Guide: Gauge, Post Length, and Disc Size
Three variables determine whether an externally threaded labret fits correctly: gauge, post length, and disc back diameter. All three need to match your current piercing to get a comfortable, stable fit.
Gauge options:
- 18G (1.0mm): Fine gauge for nostril and delicate cartilage placements; 2.5mm disc back
- 16G (1.2mm): Standard for tragus, helix, forward helix, conch, lip, Monroe, and philtrum; 4mm disc back
- 14G (1.6mm): Standard for labret chin placement, philtrum with deeper tissue, and thicker lip anatomy; 4mm to 5mm disc back
- 12G, 10G, 8G: Large gauge for stretched labret, lip, or cartilage placements; 5mm disc back
Post length guide for healed piercings:
- 1/4 inch (6mm): Snug fit for thin cartilage: tragus, forward helix, flat piercing
- 5/16 inch (8mm): Most common healed length for standard ear cartilage and lip placements
- 3/8 inch (10mm): Deeper lip tissue, initial jewelry for standard placements, or thicker cartilage
- 7/16 to 1/2 inch (11–12mm): Initial piercing length to accommodate swelling; not for long-term healed wear
Disc back diameter guide:
- 2.5mm: 18G only; minimal profile for fine placements
- 4mm: 16G and 14G standard; the most versatile disc size in the collection
- 5mm: 14G through 8G; provides more surface area for stable wear at heavier gauges
Buying the correct current size rather than guessing toward a longer post is always the right approach for externally threaded labrets. A post that is too long will shift against tissue, slow comfort, and increase snagging risk on clothing and bedding.
How to Measure Your Current Post Length
Remove the ball end from your existing labret post and measure the exposed post shaft from the base of the flat disc to the tip of the post. Do not include the disc itself in the measurement. That millimeter figure is your post length. Standard options in this collection are 6mm, 8mm, 10mm, and 12mm. Round to the nearest available size if your measurement falls between two options and when in doubt, choose the slightly longer size.
Metal Mafia 316L Steel: Medical-Grade Material Standard
Metal Mafia sources the steel in this collection specifically to implant-grade 316L specification, the same standard used in surgical instruments and medical implants, not the general stainless steel found in fashion jewelry or kitchen equipment. Both the flat disc back and the decorative end need to meet this standard since both are in continuous contact with skin and tissue.
What 316L Implant-Grade Steel Means
316L is a low-carbon austenitic steel alloy where the "L" designation limits carbide precipitation during manufacturing. The nickel content is bound within the alloy matrix rather than sitting near the surface, which minimizes nickel ion migration into tissue under normal wear. This makes it suitable for long-term piercing contact at a cost point below titanium. Every Metal Mafia externally threaded labret in this collection is produced to this specification, not simply labeled "surgical steel" without verification.
316L Steel vs. Fashion-Grade Stainless Steel
Fashion-grade steel body jewelry may meet the visual profile of surgical steel without meeting the chemical composition standards that implant-grade requires. The difference is not visible and only distinguishable through material testing. For a post inside a piercing channel around the clock, the gap is not minor. Metal Mafia 316L steel is sourced and verified to implant-grade specification, not just labeled with the term.
PVD Coating on Steel: Durability and Safety
The black PVD finish on Metal Mafia externally threaded labrets is applied through physical vapor deposition, bonding the finish to the 316L steel substrate at a molecular level in a vacuum chamber. Unlike electroplating, where a film sits on top of the base material, PVD becomes part of the surface structure. The result is a finish that does not chip, peel, or flake under daily wear, and maintains both appearance and surface integrity for years with regular cleaning.
When to Consider Internally Threaded Instead
For piercings that are still healing, recently stretched, or showing signs of sensitivity on an established externally threaded setup, internally threaded jewelry removes the externally threaded surface contact entirely. The
Steel Internally Threaded Labrets collection covers the same gauge range and placement types at the same 316L implant-grade steel standard, with a smooth post that is APP-recommended for all piercing stages.
Why Shop Metal Mafia Externally Threaded Labrets at Pierced Addiction?
Pierced Addiction stocks Metal Mafia externally threaded labrets because the Metal Mafia lineup is built to professional piercing studio standards, not retail fashion jewelry tolerances. Here is what that means in practice:
Studio-trusted supplier. Metal Mafia has supplied professional piercing studios across the United States for over two decades. The threading tolerances, disc sizing, and post geometry meet the requirements that working piercers specify, not what passes in general retail.
Verified 316L implant-grade steel. Every externally threaded labret post in this collection is manufactured to confirmed implant-grade 316L specification. No unverified "surgical steel" labeling.
Full gauge range from 18G to 8G. This collection covers fine cartilage gauges through large gauge placements that are difficult to source at the implant-grade steel standard anywhere else.
Post-only options available. Customers who already have externally threaded ends or who prefer to mix and match can purchase posts separately without buying a complete piece.
Free domestic shipping and same-day processing. Orders over $25 ship free via USPS economy. Domestic orders placed before 1pm are processed the same day.
Frequently Asked Questions
Find quick answers to the most common questions about Metal Mafia externally threaded labrets, sizing, compatibility, and material.
Can I use an externally threaded labret for tragus or helix piercings?
Yes. Metal Mafia externally threaded labrets work well for healed tragus, helix, forward helix, conch, and flat piercings. A 16G post at 1/4 inch or 5/16 inch covers most healed cartilage placements.
What disc back size should I choose?
18G posts use a 2.5mm disc back. 16G and 14G posts use a 4mm disc back. 14G through 8G posts use a 5mm disc back. Larger disc backs provide more surface area for stability at heavier gauges.
Are externally threaded labret ends interchangeable?
Yes. Any externally threaded end of the same gauge threads onto any externally threaded labret post of the same gauge. You can replace ball ends with gem, spike, or shaped ends as long as the gauge matches exactly.
Is an externally threaded labret safe for a healed piercing?
Yes. Metal Mafia externally threaded labrets in 316L implant-grade steel are appropriate for fully healed piercings. The externally threaded system is not recommended for fresh or healing piercings where the post moves through tissue regularly.
What is the difference between a complete labret and post only?
A complete labret includes both the post and a ball end. A post-only listing includes the post with its flat disc back but no decorative end. Post-only options suit customers who have ends they want to use or prefer to purchase ends separately.
Metal Mafia 316L implant-grade steel, a gauge range from 8G through 18G, and a lineup of externally threaded labrets covering plain ball, gem, spike, and PVD finishes make this collection a reliable source for externally threaded labret jewelry built to a verifiable material standard. Shop the full selection above to find your gauge, length, and style.