The Washer,keyway, cataloged under National Stock Number 5310-01-532-1507, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-532-1507 |
| Primary Part Number | CAT210-4R |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Internal Straight Key Width | 0.046 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.435 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 0.387 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN |
| Material Thickness | 0.028 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN |
| External Straight Key Width | 0.046 INCHES NOMINAL IN |
| External Key Quantity | 2 |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 0.311 INCHES MINIMUM AND 0.317 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 |
|---|---|
| CAT210-4R PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
NSN 5310-01-532-1507 is a Washer,keyway, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-532-1507 has 1 manufacturer part number on file: CAT210-4R (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CAT210-4R: Internal Straight Key Width: 0.046 INCHES NOMINAL IN; Overall Distance Including Keys: 0.435 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 0.387 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN. 11 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.