The Washer Tab, cataloged under National Stock Number 5310-01-215-5528, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-215-5528 |
| Primary Part Number | N181391 |
| Item Name | Washer Tab |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited |
| Status | ACTIVE |
| FSC Application Data | COMPRESSION,ROTATING PART ASSEMBLY |
| 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 |
|---|---|
| N181391 | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited (GBR) |
| Reference | Meaning |
|---|---|
| N181391 | 3/9 Design control — primary reference Goodrich Dba Formerly Known As Kelsey- Hayes |
| N181391 | 5/9 Secondary reference Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| N181391 | 5/9 Secondary reference Transaero, Inc. |
| 181391 | C/1 Advisory reference — outside the item-of-supply concept Goodrich Dba Formerly Known As Kelsey- Hayes |
NSN 5310-01-215-5528 is a Washer Tab, manufactured by Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-215-5528 has 1 manufacturer part number on file: N181391 (Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-616-0728. Verify interchangeability with system specifications before substitution.
Key specifications for N181391: FSC Application Data: COMPRESSION,ROTATING PART ASSEMBLY; End Item Identification: AV-8B ACFT. 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.