ASME B18.21.1
Washers – Helical Spring Lock and Plain – Inch Series
No. 2 to 3 in
—
Steel / 18-8 SS / Silicon Bronze
Helical Spring Lock / Plain
Steel Alloy / Stainless Steel
India
ASME
Salt-spray tested to relevant grade
Per property class / grade
Dry, corrosion-inhibited packing
| Size (in) | ID min (in) | OD max (in) | Thickness (in) | Type |
|---|---|---|---|---|
| 1/4″ | 0.261 | 0.487 | 0.062 | Regular Lock |
| 5/16″ | 0.324 | 0.591 | 0.078 | Regular Lock |
| 3/8″ | 0.388 | 0.694 | 0.094 | Regular Lock |
| 1/2″ | 0.518 | 0.900 | 0.125 | Regular Lock |
| 5/8″ | 0.648 | 1.082 | 0.156 | Heavy Lock |
| 3/4″ | 0.780 | 1.263 | 0.188 | Heavy Lock |
| 1″ | 1.042 | 1.626 | 0.250 | Heavy Lock |
| 1/4″ | 0.281 | 0.750 | 0.065 | Plain Type A |
| 1/2″ | 0.531 | 1.062 | 0.095 | Plain Type A |
Inside diameter clearance through the washer bore.
Outside diameter measured across the washer perimeter.
Section width measured radially across washer material.
Section thickness measured normal to washer faces.
Every batch of ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series is manufactured under an ISO 9001:2015 certified quality management system with full in-process control.
A mill test report covering chemical composition, tensile, hardness and dimensional inspection accompanies every ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series shipment.
Commonly stocked ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series sizes leave our warehouse within 48 hours of order confirmation, minimising your downtime.
Established freight and customs partners ensure reliable delivery of ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series to buyers in over 50 countries worldwide.
Non-standard ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series lengths, diameters and special thread pitches are produced to order to match your drawing requirements.
Direct-from-factory pricing on ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series with no middleman markup, offering the best value on volume and repeat orders.
Hardness, tensile strength and dimensional checks for ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series are performed in our in-house laboratory before every release.
Combine ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series with other standard-specification fasteners into a single container shipment to reduce freight costs.
Our specialist team prepares all customs, compliance and shipping paperwork for every ASME B18.21.1 Washers – Helical Spring Lock and Plain – Inch Series export order.
