The Washer,recessed, cataloged under National Stock Number 5310-01-252-0142, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Helicopters Division - Production Site. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-252-0142 |
| Primary Part Number | 140-007-33S28C4 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | AMS 5604 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material Thickness | 0.125 INCHES MINIMUM IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | STEEL COMP 630 OVERALL |
| Hole Diameter | 0.515 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 |
|---|---|
| 140-007-33S28C4 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| 140-007-33S28C4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-252-0142 is a Washer,recessed, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-252-0142 has 1 manufacturer part number on file: 140-007-33S28C4 (Leonardo Spa Helicopters Division - Production Site).
Key specifications for 140-007-33S28C4: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Top Recess Angle: 90.0 DEGREES NOMINAL; Style Designator: RECESSED BOTH SIDES; Material Document and Classification: AMS 5604 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 10 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.