The Washer,recessed, cataloged under National Stock Number 5310-01-310-3983, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-310-3983 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Top Recess Diameter | 127.0 MILLIMETERS NOMINAL MM |
| Bottom Recess Diameter | 127.0 MILLIMETERS NOMINAL MM |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | MIL-P-15035,TY FBG MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 167.0 MILLIMETERS NOMINAL MM |
| Material Thickness | 8.0 MILLIMETERS NOMINAL MM |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Material | PLASTIC PHENOLIC OVERALL |
| Hole Diameter | 121.5 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 526-5330496-7 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 526-5330496-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-310-3983 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-310-3983: Top Recess Diameter: 127.0 MILLIMETERS NOMINAL MM; Bottom Recess Diameter: 127.0 MILLIMETERS NOMINAL MM; Top Recess Angle: 90.0 DEGREES NOMINAL; Style Designator: RECESSED BOTH SIDES. 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.