The Washer,key, cataloged under National Stock Number 5310-00-423-8147, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 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. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-423-8147 |
| Primary Part Number | T355 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Overall Distance Including Keys | 2.125 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Material Thickness | 0.305 INCHES NOMINAL IN |
| Tapered Key Minor Width | 0.625 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Tapered Key Major Width | 1.750 INCHES NOMINAL IN |
| Hole Diameter | 1.031 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 |
|---|---|
| T355 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5310-00-423-8147 is a Washer,key, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-423-8147 has 1 manufacturer part number on file: T355 (Caterpillar Inc Div Caterpillar Defense).
3 possible matches (shared part number, not a government interchangeability claim): 5945-00-842-8311, 5961-01-354-6488, 6515-01-399-1390. Verify interchangeability with system specifications before substitution.
Key specifications for T355: Overall Distance Including Keys: 2.125 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 1.750 INCHES NOMINAL IN; Material Thickness: 0.305 INCHES NOMINAL IN. 8 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.