The Washer,lock, cataloged under National Stock Number 5310-01-370-3985, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metric and Multistandard Components Corp. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-370-3985 |
| Primary Part Number | DIN 127B ST 2.6 - A4B |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metric and Multistandard Components Corp |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 5.1 MILLIMETERS MAXIMUM MM |
| Material Thickness | 0.6 MILLIMETERS NOMINAL MM |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 2.6 MILLIMETERS MINIMUM AND 2.9 MILLIMETERS MAXIMUM MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DIN127-2.6-ST-B4B | Din Deutsches Institut Fur Normung Ev (DEU) |
| DIN 127B ST 2.6 - A4B PRIMARY | Metric and Multistandard Components Corp (USA) |
| Reference | Meaning |
|---|---|
| DIN127-2.6-ST-B4B | 5/9 Secondary reference Metric and Multistandard Components Corp |
NSN 5310-01-370-3985 is a Washer,lock, manufactured by Metric and Multistandard Components Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-370-3985 has 2 manufacturer part numbers on file: DIN127-2.6-ST-B4B (Din Deutsches Institut Fur Normung Ev), DIN 127B ST 2.6 - A4B (Metric and Multistandard Components Corp).
Key specifications for DIN 127B ST 2.6 - A4B: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 5.1 MILLIMETERS MAXIMUM MM; Material Thickness: 0.6 MILLIMETERS NOMINAL MM; Surface Treatment: CADMIUM OVERALL. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.