The Washer,concave, cataloged under National Stock Number 5310-01-440-3576, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-440-3576 |
| Primary Part Number | 3141AS287-501 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE AND MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.040 INCHES NOMINAL IN |
| Style Designator | CONCAVE |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5604 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Material Thickness | 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE AND OXIDE OVERALL |
| Material | STEEL COMP 630 OVERALL |
| Hole Diameter | 0.338 INCHES MINIMUM AND 0.347 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 |
|---|---|
| 3141AS287-501 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 3141AS287-501 | Hydraulics International, Inc. Dba Hydraulics International Inc (USA) |
NSN 5310-01-440-3576 is a Washer,concave, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-440-3576 has 2 manufacturer part numbers on file: 3141AS287-501 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 3141AS287-501 (Hydraulics International, Inc. Dba Hydraulics International Inc).
Key specifications for 3141AS287-501: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE AND MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.040 INCHES NOMINAL IN; Style Designator: CONCAVE; Material Document and Classification: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5604 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.