The Washer,lock, cataloged under National Stock Number 5310-01-437-0044, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bourns, Inc. Dba Bourns Sensor Controls. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-437-0044 |
| Primary Part Number | H-37-4 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bourns, Inc. Dba Bourns Sensor Controls |
| Status | ACTIVE |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.595 INCHES MINIMUM AND 0.615 INCHES MAXIMUM IN |
| Material Thickness | 0.020 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.410 INCHES MINIMUM AND 0.425 INCHES MAXIMUM 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 |
|---|---|
| H-37-4 PRIMARY | Bourns, Inc. Dba Bourns Sensor Controls (USA) |
NSN 5310-01-437-0044 is a Washer,lock, manufactured by Bourns, Inc. Dba Bourns Sensor Controls, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-437-0044 has 1 manufacturer part number on file: H-37-4 (Bourns, Inc. Dba Bourns Sensor Controls).
Key specifications for H-37-4: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.595 INCHES MINIMUM AND 0.615 INCHES MAXIMUM IN; Material Thickness: 0.020 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN; Surface Treatment: NICKEL 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.