The Washer,convex, cataloged under National Stock Number 5310-00-151-8770, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-151-8770 |
| Primary Part Number | HS1555 |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Heat Treatment | AS FABRICATED |
| Style Designator | CONVEX |
| Material Document and Classification | QQ-S-634 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-633-CANCELED FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-637 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.561 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN |
| Material Thickness | 0.090 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 1020 OR STEEL COMP 1018 OR STEEL COMP 1215 OVERALL |
| Hole Diameter | 0.202 INCHES MINIMUM AND 0.208 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 |
|---|---|
| HS1555 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| HS1555 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 5310-00-151-8770 is a Washer,convex, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-151-8770 has 1 manufacturer part number on file: HS1555 (The Boeing Company).
Key specifications for HS1555: Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Heat Treatment: AS FABRICATED; Style Designator: CONVEX; Material Document and Classification: QQ-S-634 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-633-CANCELED FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-637 FED SPEC 3RD MATERIAL RESPONSE OVERALL. 9 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.