The Washer,seal, cataloged under National Stock Number 5310-01-053-3561, 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 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-053-3561 |
| Primary Part Number | BCS1001 |
| Item Name | Washer,seal |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited |
| Status | ACTIVE |
| Special Test Features | NO FINISH |
| Supplementary Features | CRITICAL ITEM |
| Criticality Code Justification | SUPPSUPP |
| Outside Diameter | 0.120 INCHES NOMINAL0.120 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.065 INCHES NOMINAL0.065 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 | S |
| Part Number | Manufacturer |
|---|---|
| BCS1001 | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited (GBR) |
| Reference | Meaning |
|---|---|
| BCS1001 | 5/9 Secondary reference Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| BCS1001 | 3/9 Design control — primary reference Ge Aviation Systems Llc Dba Ge Aviation |
| BCS1001 | 5/9 Secondary reference Ge Aviation Systems Llc |
| BCS1001 | 5/9 Secondary reference Ge Aviation Systems Llc |
| BCS1001 | 5/9 Secondary reference Ge Aviation Systems Ltd |
NSN 5310-01-053-3561 is a Washer,seal, manufactured by Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-053-3561 has 1 manufacturer part number on file: BCS1001 (Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited).
Key specifications for BCS1001: Overall Height: 0.018 INCHES NOMINAL0.018 INCHES NOMINAL IN; Special Test Features: NO FINISH; Supplementary Features: CRITICAL ITEM; Criticality Code Justification: SUPPSUPP. 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.