The Washer,recessed, cataloged under National Stock Number 5310-01-381-4952, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Gst Industries Inc.. Government technical data includes 8 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-381-4952 |
| Primary Part Number | 02-2511 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Gst Industries Inc. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Recess Depth | 0.050 INCHES NOMINAL IN |
| Material Thickness | 0.670 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 630 OVERALL |
| Hole Diameter | 0.440 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 |
|---|---|
| 02-2511 PRIMARY | Gst Industries Inc. (USA) |
NSN 5310-01-381-4952 is a Washer,recessed, manufactured by Gst Industries Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-381-4952 has 1 manufacturer part number on file: 02-2511 (Gst Industries Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6520-01-503-2446. Verify interchangeability with system specifications before substitution.
Key specifications for 02-2511: Overall Height: 0.075 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Outside Diameter: 0.750 INCHES NOMINAL IN. 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.