The Washer,flat, cataloged under National Stock Number 5310-01-314-1931, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Zf Industrieantriebe Witten Gmbh. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-314-1931 |
| Primary Part Number | 90891 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Zf Industrieantriebe Witten Gmbh |
| Status | ACTIVE |
| Overall Diameter | 79.0 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 43.0 MILLIMETERS NOMINAL MM |
| Thickness | 12.0 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 |
| Part Number | Manufacturer |
|---|---|
| 90891 | Zf Industrieantriebe Witten Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| LE146/63-01 | 5/9 Secondary reference Ulstein Usa Inc |
| 90891 | 3/9 Design control — primary reference Ulstein Usa Inc |
NSN 5310-01-314-1931 is a Washer,flat, manufactured by Zf Industrieantriebe Witten Gmbh, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-314-1931 has 1 manufacturer part number on file: 90891 (Zf Industrieantriebe Witten Gmbh).
2 possible matches (shared part number, not a government interchangeability claim): 5999-01-586-4315, 8465-01-649-3234. Verify interchangeability with system specifications before substitution.
Key specifications for 90891: Overall Diameter: 79.0 MILLIMETERS NOMINAL MM; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL OVERALL. 7 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.