The Washer,recessed, cataloged under National Stock Number 5310-01-016-5931, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Palomar Products, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-016-5931 |
| Primary Part Number | 3359740 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Palomar Products, Inc. |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE AND QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.500 INCHES NOMINAL IN |
| Recess Depth | 0.168 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 630 OR STEEL COMP 301 OVERALL |
| Hole Diameter | 1.250 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 |
|---|---|
| 3359740 PRIMARY | Palomar Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3359740 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-016-5931 is a Washer,recessed, manufactured by Palomar Products, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-016-5931 has 1 manufacturer part number on file: 3359740 (Palomar Products, Inc.).
Key specifications for 3359740: Overall Height: 0.200 INCHES NOMINAL IN; Style Designator: RECESSED; Material Document and Classification: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE AND QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.500 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.