The Washer,key, cataloged under National Stock Number 5310-00-717-2835, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ambac International Corporation Div Ambac International. 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 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 | 5310-00-717-2835 |
| Primary Part Number | WA1720 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| Internal Prebent Key Width | 0.070 INCHES NOMINAL IN |
| Overall Distance Including Keys | 1.700 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 1.285 INCHES NOMINAL IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| External Key Quantity | 13 |
| Internal Prebent Key Length | 0.092 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 1.002 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 | X |
| Part Number | Manufacturer |
|---|---|
| WA1720 PRIMARY | Ambac International Corporation Div Ambac International (USA) |
NSN 5310-00-717-2835 is a Washer,key, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-717-2835 has 1 manufacturer part number on file: WA1720 (Ambac International Corporation Div Ambac International).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-580-2024. Verify interchangeability with system specifications before substitution.
Key specifications for WA1720: Internal Prebent Key Width: 0.070 INCHES NOMINAL IN; Overall Distance Including Keys: 1.700 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 1.285 INCHES NOMINAL IN. 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.