Flatlock Needle UY121GS (DVx1) for Flatlock & Interlock Sewing Machine

Best for garment units running flatlock and interlock machines on knit fabric — T-shirts, innerwear, and stretch garments needing a clean, flat seam finish.

Flatlock Needle Price and Flat Lock Machine Needle Name

The flat lock machine needle name for most flatbed flatlock machines is UY121GS, also printed as DVx1, 62X2 or MY1001. This flatlock needle costs ₹125 for a pack of 10 Groz-Beckert needles (₹12.50 per needle), sizes 09/65 to 14/90.

COD available above ₹249, pan-India delivery, free delivery from ₹999. Not sure which code your machine takes? Send a photo of the old needle packet on WhatsApp +91 74474 49590.

Why This Needle

Flatlock and interlock machines need a needle with an RG (ball) point built for knit fabric — a needle meant for wovens tends to snag or pierce knit loops instead of sliding between them. This needle is genuine Groz-Beckert stock in the standard flat-seamer size range, so you can match it to your fabric weight without guessing.

Features

• Genuine Groz-Beckert needle with RG (ball) point, built for knit fabric
• Also cross-referenced as UYX121GS, DVx1, 62X2, and MY1001 on some needle charts
• Size range from 09/65 to 14/90
• Sold in packs of 10

Use Cases

• Flatlock seaming on T-shirts and knit garments
• Interlock stitching on stretch fabric and innerwear
• Flat-seam finishing where a clean, low-profile seam matters
• Replacing worn needles causing skipped stitches on knit seams

Benefits

• The RG ball point is built for knit fabric, reducing snagged loops and skipped stitches compared to a woven-point needle
• Genuine Groz-Beckert stock gives consistent stitch quality on flatlock seams
• One listing covers the standard size range flat-seamer workshops use

Machine Compatibility

We haven’t independently verified fit on a specific machine brand — check your machine’s manual against the specs table below (UY121GS, UYX121GS, DVx1, 62X2, MY1001 are the same needle).

UY121GS Flatlock Needle Dimensions

UY121GS (DVx1) has a 2.0 mm shank, 43.9 mm overall length and 38.9 mm from butt to eye, with a 13.5 mm shank length (Groz-Beckert UY 121 GHS/DVX1 listing). Organ prints the same system as 1628, 62X21 or 759. It is shorter than UY128GAS (44.7 mm) and DVx43 (45 mm), so do not mix codes on one machine.

Specs

How to Fit This Needle

First, match needle size to your fabric weight — 09/65 for fine knits, 14/90 for heavier stretch fabric. Next, loosen the needle clamp screw on your flatlock or interlock machine and remove the old needle, noting its orientation. Then, insert the new needle fully into the clamp per your machine’s manual. Finally, tighten the clamp screw and run a test seam on scrap knit fabric before production.

FAQs

What’s the difference between this and a regular overlock needle?

This needle has an RG (ball) point built specifically for knit fabric, which slides between knit loops instead of piercing them. A regular round-point needle meant for wovens can snag knit fabric and cause skipped stitches on a flatlock seam.

What other names is this needle sold under?

This needle system is also listed as UYX121GS, DVx1, 62X2, and MY1001 on some needle charts and supplier catalogs — it’s the same needle, so check the specs table above if your machine manual uses a different code.

Which size should I use?

For fine knits and lightweight stretch fabric, 09/65 or 11/75 works well. For heavier knit fabric, move up to 14/90. Too fine a needle on heavier fabric can bend; too heavy a needle on fine knits leaves visible holes.

Will this fit my flatlock machine brand?

This is a standard flat-seamer needle system, but we haven’t verified fit on a specific machine brand. Check your machine’s manual for the needle system code (UY121GS, DVx1, or the others listed above) before ordering.

What is the flatlock needle price?

A pack of 10 Groz-Beckert UY121GS (DVx1) flatlock needles costs ₹125, with COD above ₹249.

Is DVx1 the same as UY121GS?

Yes. Groz-Beckert lists UY 121 GS and DVX1 together as one system, also sold as 62X2, 62X21 and MY1001.

Which flatlock needle is used in Jack W4?

Jack W4 is specified with UY128GAS, not UY121GS. Buy the UY128GAS needle for Jack W4.

Flatlock machine ki sui ka naam kya hai?

Flatlock machine ki sui ka naam UY121GS ya DVx1 hai. Jack W4 me UY128GAS lagti hai, aur Pegasus / Kansai me DVx43. Purane packet ka code dekh kar order karein.