18k gold threadless post is the highest gold purity practical for body jewelry, delivering 75% pure gold directly against tissue with every piece you wear. Khrysos offers this post in solid 18KT yellow gold with a 2.5mm flat back disc, available at 18G in multiple wearable lengths. Each post uses a standard 25G hollow shaft compatible with all major threadless ends. Browse sizing options below.
Shop the 18K Gold Threadless Post
There is one post in this collection, available in multiple wearable lengths to suit every piercing placement. The 18Kt Gold Threadless Labret Post: 2.5mm Back comes in solid yellow 18KT gold. Key specs at a glance:
- Gauge: 18G (1.0mm), the professional standard for lobe, nostril, tragus, and most cartilage placements
- Flat disc: 2.5mm, the optimal size for healed piercings
- Wearable lengths: 1/4" (6mm), 9/32" (7mm), 5/16" (8mm), 23/64" (9mm), 3/8" (10mm)
- Compatibility: Standard 25G hollow shaft fits all major threadless ends
- Sold individually: threadless ends are purchased separately
Note on pricing: Pricing on all 18KT solid gold posts reflects current gold market values and may shift over time. For accurate pricing before ordering, contact the Khrysos team directly.
Why the Post Material Is the Most Important Decision in Your Threadless Setup
Most buyers spend considerable time selecting threadless ends and very little time thinking about the post. This is the wrong order. The post is the component that matters most from a material perspective, and understanding why changes how you approach a gold threadless post purchase.
A threadless end sits at the surface of your skin, visible from the front of the piercing. The post shaft passes through the fistula and contacts living tissue continuously. The flat disc sits behind the piercing against the back surface of the ear, lip, or nostril. From the moment a gold threadless post is in place, the alloy of that post is in direct and continuous contact with your tissue. The decorative end, by contrast, contacts only the surface of your skin.
This distinction changes the material calculus entirely. Because the post is the component that lives inside the piercing, the purity and biocompatibility of the post material matters more than the purity of the end material. This post places 75% pure gold in continuous tissue contact. That is the correct starting point for anyone building a full-gold piercing setup.
18K vs 14K Gold for a Threadless Post
Both 18K and 14K solid gold are nickel-free and APP-compliant for healed piercings. The difference is in alloy content: 14K gold is 58.3% pure gold; 18K gold is 75% pure. At the post level, where the shaft sits inside the fistula continuously, higher purity means fewer alloying metals in direct tissue contact across the lifetime of the post. Pure 24K gold is too soft to function as a post and is not used in piercing applications. 18K is the apex.
For wearers who want a 14K option for the post, the 14KT Gold Labrets collection offers flat-back posts in solid 14K gold across multiple gauges and lengths.
Sizing Your 18K Gold Threadless Post
Getting the right wearable length before ordering is the single most effective way to ensure proper fit and comfort. Gauge for this gold threadless post is fixed at 18G (1.0mm), the professional standard for lobe, nostril, tragus, and most cartilage placements. Wearable length is the distance from the inside face of the flat disc to the tip of the hollow shaft. Match this to your tissue thickness, then add 1 to 2mm for comfortable clearance.
- Thin cartilage (helix, forward helix, tragus): 1/4" (6mm), the standard starting length for most professional ear cartilage piercings
- Standard lobe and most nostril placements: 5/16" (8mm), appropriate for average adult earlobe thickness and nostril anatomy
- Thicker tissue (labret, philtrum, conch): 3/8" (10mm), provides sufficient wearable length without the disc embedding under pressure
When unsure between two adjacent lengths, choose the longer option. A threadless post that is too short creates pressure against the fistula wall, prevents ends from seating correctly in the hollow shaft, and can cause irritation at the disc site. Downsizing to a shorter length after the piercing has fully stabilized is always possible.
The 2.5mm Flat Disc: Why This Size Works
The 2.5mm disc is the correct size for healed piercings. It is small enough to sit flush against the back of most placements without being visible from the front or catching on fabric, and large enough to distribute the mechanical load of the pin tension across sufficient surface area to prevent embedding over time. Larger discs (3mm, 4mm) are appropriate for fresh piercings where tissue is still soft and more prone to pull-through. For a healed placement receiving a solid gold post for the first time, 2.5mm is the right choice.
Completing Your 18K Gold Setup
The post is the foundation of your setup, not the final step. Once you have the correct gauge and wearable length confirmed for your 18k gold threadless post, the next decision is the decorative end that sits in the hollow shaft. For a fully matching 18K gold look from disc to decorative top, explore the 18KT Solid Gold Threadless Ends collection. Khrysos 18KT ends use a standard 25G pin compatible with this post, ensuring a secure push-fit across every style in the range.
If you prefer a mixed-karat approach, 14K gold ends are also fully compatible. The visible end in a mixed setup will carry a slightly different color tone than the flat disc on an 18K post, which some wearers prefer for the layered visual variation it creates in a curated ear. Both approaches are valid. Either way, the post material remains the higher-purity 18K gold at the tissue contact point.
Why Buy Your Gold Threadless Post at Khrysos
Khrysos is APP Phase 1 and 2 verified, and every post in this collection is produced at an ISO9001-certified facility to APP material and dimension standards.
- APP Phase 1 and 2 Verified: Every post meets the material, dimension, and finishing standards required for use in APP-affiliated studios
- ISO9001-Certified Manufacturing: Consistent quality control across shaft gauge accuracy, disc geometry, and gold alloy composition on every piece produced
- 750-Hallmarked Solid Gold: Every Khrysos 18KT post carries the 750 hallmark denoting 75% gold content; placed on the non-tissue-contact area of the disc and may require a jeweler's loupe to read
- Same-Day Shipping: Orders placed within the cutoff window ship the same day, keeping studio and personal orders on a reliable timeline
- Wholesale Access for Professional Piercers: Studios and APP-member piercers can apply for a wholesale account to source 18KT posts at professional pricing with fast turnaround
FAQ
Is 18K gold strong enough to use as a threadless post?
Yes. 18K gold (75% pure) is recognized by the APP as appropriate for body jewelry in healed piercings. The hollow shaft is precision-milled to receive threadless pin tension without bending or deforming under normal wear. Pure 24K gold is too soft for piercing use; 18K is the highest practical karat available.
What threadless ends are compatible with the Khrysos 18K gold post?
All threadless ends using the standard 25G pin format are compatible, including ends from NeoMetal, Anatometal, BVLA, Junipurr, Buddha Jewelry, and all Khrysos 14KT and 18KT threadless ends. One post works with every compatible brand.
What wearable length should I choose for my piercing?
Measure tissue thickness at the piercing and add 1 to 2mm for comfortable fit. Thin cartilage typically fits 1/4" (6mm). Standard lobe and nostril fit 5/16" (8mm). Thicker tissue for labret or philtrum placements typically needs 3/8" (10mm). When between sizes, choose the longer option.
Why choose 18K over 14K gold for a threadless post?
The post is in continuous tissue contact, making gold purity more consequential at the post level than at the end level. 18K gold (75% pure) has less alloy content than 14K (58.3% pure), meaning fewer alloying metals at the fistula wall over the lifetime of wear. For a full-gold setup or sensitive healed piercings, 18K provides the highest practical purity available.
Can I use this post for a fresh piercing?
No. Initial jewelry should be selected and installed by a professional piercer at the correct material, gauge, and length for your anatomy. This gold threadless post is designed for fully healed piercings only.
How do I verify my post is genuine 18K gold?
Look for the 750 hallmark on the non-tissue-contact area of the flat disc. This marking denotes 75% gold content and is the international standard for 18K verification. It is small and may require a jeweler's loupe to read clearly.
How should I care for an 18K gold threadless post?
Rinse with clean water and dry thoroughly after chlorine, saltwater, or heavy sweat exposure. Solid 18K gold is highly resistant to tarnish, but chemical exposure from perfume or pool water can cause surface dulling over time. Use a silver polishing cloth to remove any tarnish from the disc or visible shaft portion.