The Washer,spring Tension, cataloged under National Stock Number 5310-01-004-9550, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-004-9550 |
| Primary Part Number | 4M64C1 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Material Document and Classification | QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.620 INCHES MINIMUM AND 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM0.630 INCHES MAXIMUM IN |
| Material Thickness | 0.022 INCHES NOMINAL0.022 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 410 OVERALL |
| Hole Diameter | 0.314 INCHES MINIMUM AND 0.314 INCHES MINIMUM AND 0.320 INCHES MAXIMUM0.320 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 |
|---|---|
| 4M64C1 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 4M64C1 | 5/9 Secondary reference Itw Shakeproof Automotive Products |
| 3502-18-36-4102 | 5/9 Secondary reference Itw Shakeproof Automotive Products |
NSN 5310-01-004-9550 is a Washer,spring Tension, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-004-9550 has 1 manufacturer part number on file: 4M64C1 (The Boeing Company Div Defense).
Key specifications for 4M64C1: Overall Height: 0.088 INCHES MINIMUM AND 0.088 INCHES MINIMUM AND 0.108 INCHES MAXIMUM0.108 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.620 INCHES MINIMUM AND 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM0.630 INCHES MAXIMUM IN; Material Thickness: 0.022 INCHES NOMINAL0.022 INCHES NOMINAL IN. 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.