The Washer,lock, cataloged under National Stock Number 5310-01-504-5125, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Airbus Helicopters (ets De Marignane). 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-504-5125 |
| Primary Part Number | S652A40T0311 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Airbus Helicopters (ets De Marignane) |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TY II, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | AMS-S-18729, COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 0.867 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 |
|---|---|
| S652A40T0311 | Airbus Helicopters (ets De Marignane) (FRA) |
| SL61WTM20P | Shur-Lok International (BEL) |
| Reference | Meaning |
|---|---|
| 10122338 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| SL61WTM20P | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-504-5125 is a Washer,lock, manufactured by Airbus Helicopters (ets De Marignane), classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-504-5125 has 2 manufacturer part numbers on file: S652A40T0311 (Airbus Helicopters (ets De Marignane)), SL61WTM20P (Shur-Lok International).
Key specifications for S652A40T0311: Surface Treatment Document and Classification: QQ-P-416, TY II, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: AMS-S-18729, COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.000 INCHES NOMINAL IN; Special Features: LOCKWASHER WITH EXTRACTION THREAD FOR STA-LOK BEARING LOCKNUT. 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.