Thread Identification

Instructions

Our table for thread identification and helpful overviews of common thread types. We recommend to use a slide gauge and the lower measuring arm to define the outer diameter of the thread Ⓐ or the core diameter of the container opening Ⓑ.

Thread

GL 28
∅ Ⓐ Thread Outer Diameter: 28.00 mm max. / 27.50 mm min. // ∅ Ⓑ Core Inner Diameter: 25.98 mm max. // Ⓒ Gradient: 3.00 mm // Norm: DIN 168-1 // Comments (also re. brand names, trademarks): Chromsystems®, Recipe®, 500 ml Puffer from Sigma®

GL 32 (glass)
∅ Ⓐ Thread Outer Diameter: 32.00 mm max. / 31.30 mm min. // ∅ Ⓑ Core Inner Diameter: 29.30 mm max. // Ⓒ Gradient: 4.00 mm // Norm: DIN 168-1 // Comments (also re. brand names, trademarks): For containers of the brand Duran® 

S 32 (plastic)
∅ Ⓐ Thread Outer Diameter: 32.00 mm max. / 31.50 mm min. // ∅ Ⓑ Core Inner Diameter: 29.00 mm max. // Ⓒ Gradient: 3.00 mm // Norm: - // Comments (also re. brand names, trademarks): - 

GL 38/ GPI 38-400 (glass) (short)
∅ Ⓐ Thread Outer Diameter: 37.49 mm max. / 36.88 mm min. // ∅ Ⓑ Core Inner Diameter: 35.10 mm max. // Ⓒ Gradient: 4.23 mm // Norm: GPI / SPI // Comments (also re. brand names, trademarks): For containers of the brands Wheaton® and Nalgene®

GL 38 short (foldable canister)
∅ Ⓐ Thread Outer Diameter: 38.00 mm max. / 37.50 mm min. // ∅ Ⓑ Core Inner Diameter: 35.00 mm max. // Ⓒ Gradient: 3.00 mm //Norm: DIN 6063-2 // Comments (also re. brand names, trademarks): 4 L BDH bottle, Fulltime® Reagents

S 38 (plastic)
∅ Ⓐ Thread Outer Diameter: 38.00 mm max. / 37.50 mm min. // ∅ Ⓑ Core Inner Diameter: 35.00 mm max. // Ⓒ Gradient: 3.00 mm // Norm: DIN 6063-1 // Comments (also re. brand names, trademarks): 2.5 L canister from Recipe®, HPLC-P Water, 1 litre Biosolve®, Fresenius Kabi® 10 L 

GPI 38-430 (glass) (long)
∅ Ⓐ Thread Outer Diameter: 37.49 mm max. / 36.88 mm min. // ∅ Ⓑ Core Inner Diameter: 35.10 mm max. // Ⓒ Gradient: 4.23 mm // Norm: GPI / SPI // Comments (also re. brand names, trademarks): Wheaton®, Nalgene® 4-edge 500 ml plastic bottle 

GL 40 (glass)
∅ Ⓐ Thread Outer Diameter: 40.00 mm max. / 39.30 mm min. // ∅ Ⓑ Core Inner Diameter: 37.30 mm max. // Ⓒ Gradient: 4.00 mm //Norm: DIN 168-1 // Comments (also re. brand names, trademarks): For containers of the brand Merck® 

S 40/41 (plastic)
∅ Ⓐ Thread Outer Diameter: 41.00 mm max. / 39.50 mm min. // ∅ Ⓑ Core Inner Diameter: 37.00 mm max. // Ⓒ Gradient: 3.50 mm // Norm: DIN 6063-1 // Comments (also re. brand names, trademarks): Due to the tolerances involved, a GL 40 cap will often fit on to an S 40 container of the brand Metrohm® / Merck® 

S 42
∅ Ⓐ Thread Outer Diameter: 42.00 mm max. / 41.50 mm min. // ∅ Ⓑ Core Inner Diameter: 38.00 mm max. // Ⓒ Gradient: 4.00 mm // Norm: - // Comments (also re. brand names, trademarks): The designation DIN42 is often written on the cap, Agro Paris Tech 51, Polimoon™, Nalgene® 

GL 45
∅ Ⓐ Thread Outer Diameter: 45.00 mm max. / 44.30 mm min. // ∅ Ⓑ Core Inner Diameter: 42.30 mm max. // Ⓒ Gradient: 4.00 mm // Norm: DIN 168-1 // Comments (also re. brand names, trademarks): The most common thread for laboratory glass bottles

S 45
∅ Ⓐ Thread Outer Diameter: 45.00 mm max. / 44.30 mm min. // ∅ Ⓑ Core Inner Diameter: 41.00 mm max. // Ⓒ Gradient: 4.00 mm // Norm: DIN 6063-1 DIN 6063-2 // Comments (also re. brand names, trademarks): Due to the tolerances involved, a GL 45 cap will fit on to an S 45 thread

DIN45
∅ Ⓐ Thread Outer Diameter: 44.30 mm max. / 39.70 mm min. // ∅ Ⓑ Core Inner Diameter: 40.80 mm max. // Ⓒ Gradient: 4.00 mm // Norm: DIN45 // Comments (also re. brand names, trademarks): - 

S50
∅ Ⓐ Thread Outer Diameter: 50.00 mm max. / 49.30 mm min. // ∅ Ⓑ Core Inner Diameter: 46.00 mm max. // Ⓒ Gradient: 4.00 mm // Norm: DIN 6063-1 // Comments (also re. brand names, trademarks): Space-saving canister

S51
∅ Ⓐ Thread Outer Diameter: 51.00 mm max. / 49.00 mm min. // ∅ Ⓑ Core Inner Diameter: 47.00 mm max. // Ⓒ Gradient: 4.00 mm // Norm: - // Comments (also re. brand names, trademarks): Almost identical to S 50, but the outer diameter of the container thread (OD=Ⓐ) is significantly different. The designation DIN50 is written on the cap

B53
∅ Ⓐ Thread Outer Diameter: 54.00 mm max. / 53.50 mm min. // ∅ Ⓑ Core Inner Diameter: 47.50 mm max. // Ⓒ Gradient: 6.35 mm // Norm: 53B // Comments (also re. brand names, trademarks): For containers of the brands Nalgene® and Polimoon™ 

S55
∅ Ⓐ Thread Outer Diameter: 53.80 mm max. / 53.20 mm min. // ∅ Ⓑ Core Inner Diameter: 49.50 mm max. // Ⓒ Gradient: 5.00 mm // Norm: S55 // Comments (also re. brand names, trademarks):The designation 51 / DIN51 / HP51 is often written on the cap

S 60/61
∅ Ⓐ Thread Outer Diameter: 60.00 mm max. / 59.20 mm min. // ∅ Ⓑ Core Inner Diameter: 54.00 mm max. // Ⓒ Gradient: 6.00 mm // Norm: DIN 6063-1 // Comments (also re. brand names, trademarks): The designation 61, Mauser® 13, RPC Containers® C59PP / DIN61 is often written on the cap 

B 63 / GPI 63-415
∅ Ⓐ Thread Outer Diameter: 62.51 mm max. / 61.62 mm min. // ∅ Ⓑ Core Inner Diameter: 60.12 mm max. // Ⓒ Gradient: 4.23 mm // Norm: GPI / SPI // Comments (also re. brand names, trademarks): For containers of the brand Nalgene® 

S 65
∅ Ⓐ Thread Outer Diameter: 65.00 mm max. / 64.30 mm min. // ∅ Ⓑ Core Inner Diameter: 59.00 mm max. // Ⓒ Gradient: 6.00 mm // Norm: - // Comments (also re. brand names, trademarks): For containers of the brand Kautex® (round canisters) 

S 70/71
∅ Ⓐ Thread Outer Diameter: 71.00 mm max. / 69.30 mm min. // ∅ Ⓑ Core Inner Diameter: 65.00 mm max. // Ⓒ Gradient: 6.00 mm // Norm: DIN71 // Comments (also re. brand names, trademarks): The designation 71, Rieke® 70 mm is often written on the cap 

GLS 80
∅ Ⓐ Thread Outer Diameter: 80.00 mm max. / 79.00 mm min. // ∅ Ⓑ Core Inner Diameter: 77.00 mm max. // Ⓒ Gradient: 15P5 // Norm: (DIN 168-1) short // Comments (also re. brand names, trademarks): Typical laboratory bottle with wide neck, short thread with 3 thread ends 

B 83
∅ Ⓐ Thread Outer Diameter: 89.18 mm max. / 88.29 mm min. // ∅ Ⓑ Core Inner Diameter: 79.00 mm max. // Ⓒ Gradient: 12.70 mm // Norm: 83B // Comments (also re. brand names, trademarks): For containers of the brands Nalgene®, Kautex®, Foxx® and Carboy 80 mm

S 90
∅ Ⓐ Thread Outer Diameter: 90.00 mm max. / 89.30 mm min. // ∅ Ⓑ Core Inner Diameter: 84.00 mm max. // Ⓒ Gradient: 6.00 mm // Norm: - // Comments (also re. brand names, trademarks): The designation D90 is often written on the cap 

S 95
∅ Ⓐ Thread Outer Diameter: 95.00 mm max. / 93.50 mm min. // ∅ Ⓑ Core Inner Diameter: 89.00 mm max. // Ⓒ Gradient: 7.00 mm // Norm: - // Comments (also re. brand names, trademarks): - 

105x 6
∅ Ⓐ Thread Outer Diameter: 106.00 mm max. / 104.00 mm min. // ∅ Ⓑ Core Inner Diameter: 95.00 mm max. // Ⓒ Gradient: 6.00 mm // Norm: - // Comments (also re. brand names, trademarks): Hünersdorff

Notice
All the measurements and values given here can vary up to 0.5 mm, dependent upon the manufacturer involved (due to manufacturing tolerances). Brand names and trademarks are the property of the respective owners. The brand names and protected trademarks mentioned here are simply of descriptional nature.