The Washer,lock, cataloged under National Stock Number 5310-01-588-4291, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-588-4291 |
| Primary Part Number | 91118A120 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Material | NICKEL ALLOY AND COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 91118A120 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-588-4291 is a Washer,lock, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-588-4291 has 1 manufacturer part number on file: 91118A120 (Mcmaster-Carr Supply Co).
Key specifications for 91118A120: Special Features: SPRING LOCK TYPE: STANDARD;FOR SCREW SIZE: 3/8 INCH NOMINAL;ROCKWELL HARDNESS: NOT RATED;SPECIFICATIONS MET: ASME B18.21.1;MATERIAL TYPE: NICKEL-COPPER ALLOY (MONEL);FINISH: PLAIN;INSIDE DIAMETER: 0.380 INCH NOMINAL;OUTSIDE DIAMETER: 0.680 INCH NOMINAL;MINIMUM THICKNESS: 0.090 INCH NOMINAL IN; Part Name Assigned by Controlling Agency: LOCKING WASHER; End Item Identification: 5180-01-518-7339;SHOP EQUIPMENT GENERAL PURPOSE; Material: NICKEL ALLOY AND COPPER ALLOY OVERALL. 1 specification is 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.