The Washer,spring Tension, cataloged under National Stock Number 5310-00-033-4618, 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 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5310-00-033-4618 |
| Primary Part Number | 9M70B3 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Material Thickness | 0.040 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 1050 OVERALL |
| Hole Diameter | 0.473 INCHES MINIMUM AND 0.478 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 |
NSN 5310-00-033-4618 is a Washer,spring Tension, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-033-4618 has 2 manufacturer part numbers on file: 9M70B3 (The Boeing Company Div Defense), 295853 (Monadnock Company, the Dba Lisi Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 2805-01-132-3307. Verify interchangeability with system specifications before substitution.
Key specifications for 9M70B3: Overall Height: 0.125 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.000 INCHES NOMINAL IN. 7 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.