DJ WASHERS is a spring lock washer manufacturer in China supplying DIN 127B split spring washers in spring steel (65Mn), for anti-loosening in bolted assemblies. Review dimensions, material, finish and packing details before sending an export RFQ.
DIN 127B spring lock washer RFQs are reviewed by size, material, finish and batch quantity.
DIN 127B refers to split spring lock washers used under bolt or nut assemblies where elastic preload and friction help resist loosening. For export RFQs, buyers should confirm the nominal size, inside diameter, outside diameter, thickness, free height, material, finish, quantity and packing method instead of sending only a standard number. For China sourcing, also review why the DIN 127B H dimension / free height should be confirmed before comparing low-cost quotations.
DIN 127BSpring SteelAnti-Loosening
DIN 127B spring lock washers support elastic preload and friction locking in bolted assemblies.
Finish is reviewed by corrosion requirement, spring steel hardness and assembly condition. See the washer surface finish guide when comparing coating options.
Send the standard and working condition so the washer can be matched correctly.
Spring lock washers are quoted under different national standards depending on the destination market.
There is no direct ISO standard for split spring lock washers — ISO 7089 / 7090 cover flat washers only. DIN 127 was formally withdrawn in Germany, yet DIN 127B remains the most-quoted reference in international RFQs. Buyers in Russia and the CIS typically specify GOST 6402-70, US buyers use ASME B18.21.1 inch series, and Japanese drawings reference JIS B 1251. Nominal sizes overlap, but section thickness and free height differ between standards, so an RFQ should always state the governing standard plus ID, OD, section and free height rather than assuming equivalence.
| Standard | Region | Series / forms | Notes for RFQ |
|---|---|---|---|
| DIN 127 A / B | Germany, de facto worldwide | Form A turned-up ends, Form B plain ends | Form B is the common export item; metric M2–M100; withdrawn standard but still the trade reference |
| GOST 6402-70 | Russia / CIS | Light (Л), Normal (Н), Heavy (Т), Extra heavy (ОТ) | Normal series is the closest match to DIN 127B; section sizes differ slightly — confirm dimensions, not just the standard number |
| ASME B18.21.1 | USA | Regular, Heavy, Extra duty | Inch sizes; hardness and section differ from metric DIN items |
| JIS B 1251 | Japan | Class 2, Class 3 spring lock washers | Metric; dimensions close to DIN 127B but not identical |
| ISO | — | No direct equivalent | ISO covers flat washers (7089 / 7090); quote DIN 127B or a national standard instead |
Send standard, dimensions, material, finish, hardness, quantity, packing and destination. For non-standard sizes, add a drawing or sample.
Send the standard, size, material, finish, hardness requirement, quantity and packing requirement.
Yes. DIN 127B washer RFQs can be reviewed by size, material, surface treatment and quantity.
Common finishes include black oxide, electro-zinc plating, mechanical zinc plating and Dacromet, subject to confirmed order requirement.
No. ISO 7089 and ISO 7090 cover flat washers only. Split spring lock washers are quoted as DIN 127B (the de facto international reference), GOST 6402-70 in Russia and the CIS, ASME B18.21.1 in the US, or JIS B 1251 in Japan.
Both share the same nominal dimensions. Form A has turned-up (raised) ends and Form B has plain square-cut ends. DIN 127B is the common export version and the one usually meant when an RFQ says only "DIN 127".
GOST 6402-70 normal series is the closest Russian equivalent. Section thickness and free height differ slightly from DIN 127B, so buyers should confirm ID, OD, section and free height in the RFQ instead of relying on the standard number alone.
Dimensions and weight per 1000 pieces are kept for RFQ and shipping estimates.
Three range tables are retained from the internal standard data source.
| Parameter | Phi 2 | Phi 2.2 | Phi 2.5 | Phi 3 | Phi 3.5 | Phi 4 | Phi 5 | Phi 6 | Phi 7 | Phi 8 | Phi 10 | Phi 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d min | 2.1 | 2.3 | 2.6 | 3.1 | 3.6 | 4.1 | 5.1 | 6.1 | 7.1 | 8.1 | 10.2 | 12.2 |
| d max | 2.4 | 2.6 | 2.9 | 3.4 | 3.9 | 4.4 | 5.4 | 6.5 | 7.5 | 8.5 | 10.7 | 12.7 |
| n nominal (thickness) | 0.9 | 1 | 1 | 1.3 | 1.3 | 1.5 | 1.8 | 2.5 | 2.5 | 3 | 3.5 | 4 |
| h nominal (width) | 0.5 | 0.6 | 0.6 | 0.8 | 0.8 | 0.9 | 1.2 | 1.6 | 1.6 | 2 | 2.2 | 2.5 |
| H min (free height) | 1 | 1.2 | 1.2 | 1.6 | 1.6 | 1.8 | 2.4 | 3.2 | 3.2 | 4 | 4.4 | 5 |
| Approx. steel weight / 1000 pcs (kg) | 0.033 | 0.050 | 0.053 | 0.11 | 0.12 | 0.18 | 0.36 | 0.83 | 0.93 | 1.6 | 2.53 | 3.82 |
| Parameter | Phi 14 | Phi 16 | Phi 18 | Phi 20 | Phi 22 | Phi 24 | Phi 27 | Phi 30 | Phi 36 | Phi 39 | Phi 42 | Phi 45 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d min | 14.2 | 16.2 | 18.2 | 20.2 | 22.5 | 24.5 | 27.5 | 30.5 | 36.5 | 39.5 | 42.5 | 45.5 |
| n nominal (thickness) | 4.5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 10 | 10 | 12 | 12 |
| h nominal (width) | 3 | 3.5 | 3.5 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 7 | 7 |
| H min (free height) | 6 | 7 | 7 | 8 | 8 | 10 | 10 | 12 | 12 | 12 | 14 | 14 |
| Approx. steel weight / 1000 pcs (kg) | 6.01 | 8.91 | 9.73 | 15.2 | 16.5 | 26.2 | 28.7 | 44.3 | 67.3 | 71.7 | 111 | 117 |
| Parameter | Phi 48 | Phi 52 | Phi 56 | Phi 60 | Phi 64 | Phi 68 | Phi 72 | Phi 80 | Phi 90 | Phi 100 |
|---|---|---|---|---|---|---|---|---|---|---|
| d min | 49 | 53 | 57 | 61 | 65 | 69 | 73 | 81 | 91 | 101 |
| n nominal (thickness) | 12 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| h nominal (width) | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| H min (free height) | 14 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Approx. steel weight / 1000 pcs (kg) | 123 | 182 | 193 | 203 | 218 | 228 | 240 | 262 | 290 | 318 |
