The Washer,lock, cataloged under National Stock Number 5310-01-264-9409, 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 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-264-9409 |
| Primary Part Number | DIN127B-M12-A4C |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metric and Multistandard Components Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | DIN267,SHEET 9,CODE A4 NATIONAL SPEC 1ST TREATMENT RESPONSE AND DIN50941,PROCESS GROUP C NATIONAL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Hardness Rating | 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 21.1 MILLIMETERS MAXIMUM MM |
| Material Thickness | 2.35 MILLIMETERS MINIMUM AND 2.65 MILLIMETERS MAXIMUM MM |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 12.2 MILLIMETERS MINIMUM AND 12.7 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 |
|---|---|
| DIN127B-M12-A4C PRIMARY | Metric and Multistandard Components Corp (USA) |
| DIN127-B12-A4C | Din Deutsches Institut Fur Normung Ev (DEU) |
| Reference | Meaning |
|---|---|
| 085 310 19 | 5/2 Secondary reference U.S. Government activity |
| B-12-DIN-127 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-264-9409 is a Washer,lock, manufactured by Metric and Multistandard Components Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-264-9409 has 2 manufacturer part numbers on file: DIN127B-M12-A4C (Metric and Multistandard Components Corp), DIN127-B12-A4C (Din Deutsches Institut Fur Normung Ev).
Key specifications for DIN127B-M12-A4C: Surface Treatment Document and Classification: DIN267,SHEET 9,CODE A4 NATIONAL SPEC 1ST TREATMENT RESPONSE AND DIN50941,PROCESS GROUP C NATIONAL SPEC 2ND TREATMENT RESPONSE OVERALL; Hardness Rating: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 21.1 MILLIMETERS MAXIMUM MM. 8 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.