The Washer,key, cataloged under National Stock Number 5310-01-172-1990, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Timken Corporation. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-172-1990 |
| Primary Part Number | TW2117 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Overall Distance Including Keys | 4.625 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 4.031 INCHES NOMINAL IN |
| Material Thickness | 0.095 INCHES NOMINAL IN |
| External Key Quantity | 19 |
| 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 |
|---|---|
| TW2117 PRIMARY | The Timken Corporation (USA) |
| 8TW2117 | Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA) |
| Reference | Meaning |
|---|---|
| 5310PL0721985 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| TW117 | 5/9 Secondary reference The Timken Corporation |
| TW 117 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-172-1990 is a Washer,key, manufactured by The Timken Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-172-1990 has 2 manufacturer part numbers on file: TW2117 (The Timken Corporation), 8TW2117 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.).
Key specifications for TW2117: Overall Distance Including Keys: 4.625 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 4.031 INCHES NOMINAL IN; Material Thickness: 0.095 INCHES NOMINAL IN. 5 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.