The Washer,key, cataloged under National Stock Number 5310-01-393-8553, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Krobach Mfg. Corp. Dba Krobach Manufacturing Corp. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-393-8553 |
| Primary Part Number | 101A783BC-2 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp |
| Status | ACTIVE |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-766 CL 410 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material Thickness | 0.078 INCHES NOMINAL IN |
| External Straight Key Width | 1.000 INCHES NOMINAL IN |
| Distance From Centerline to End of Key | 1.125 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.812 INCHES NOMINAL IN |
| 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 |
|---|---|
| 101A783BC-2 PRIMARY | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| 101A783BC-2 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
NSN 5310-01-393-8553 is a Washer,key, manufactured by Krobach Mfg. Corp. Dba Krobach Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-393-8553 has 1 manufacturer part number on file: 101A783BC-2 (Krobach Mfg. Corp. Dba Krobach Manufacturing Corp).
Key specifications for 101A783BC-2: Style Designator: KEY; Material Document and Classification: QQ-S-766 CL 410 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Material Thickness: 0.078 INCHES NOMINAL IN; External Straight Key Width: 1.000 INCHES NOMINAL IN. 7 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.