The Washer,split, cataloged under National Stock Number 5310-01-100-8771, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metalore, Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-100-8771 |
| Primary Part Number | 3402520 |
| Item Name | Washer,split |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metalore, Inc |
| Status | ACTIVE |
| Distance Across Split Opening | 0.005 INCHES NOMINAL IN |
| Style Designator | SPLIT |
| Outside Diameter | 0.280 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Material Thickness | 0.024 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN |
| Hole Diameter | 0.195 INCHES MINIMUM AND 0.200 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 |
|---|---|
| 3402520 PRIMARY | Metalore, Inc (USA) |
| Reference | Meaning |
|---|---|
| 3402520 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-100-8771 is a Washer,split, manufactured by Metalore, Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-100-8771 has 1 manufacturer part number on file: 3402520 (Metalore, Inc).
1 possible match (shared part number, not a government interchangeability claim): 2930-01-598-9116. Verify interchangeability with system specifications before substitution.
Key specifications for 3402520: Distance Across Split Opening: 0.005 INCHES NOMINAL IN; Style Designator: SPLIT; Outside Diameter: 0.280 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Material Thickness: 0.024 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN. 5 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.