The Washer,flat, cataloged under National Stock Number 5310-01-474-8790, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metal Improvement Co Llc Div Everlube Products a Div.of Metal Improvement Company, Llc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-474-8790 |
| Primary Part Number | KRONAPLATE 5941 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metal Improvement Co Llc Div Everlube Products a Div.of Metal Improvement Company, Llc |
| Status | ACTIVE |
| Surface Finish | 250.0 MICROINCHES ALL SURFACES |
| Surface Treatment Document and Classification | DOD-P-16232,TYPE M,CLASS 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.250 INCHES NOMINAL IN |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AISI E4140,UNS G41400 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PHOSPHATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.640 INCHES NOMINAL IN |
| Thickness | 0.187 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 |
|---|---|
| 1603000-B | Oxy Metal Industries Corp Parker Co the (USA) |
| KRONAPLATE 5941 PRIMARY | Metal Improvement Co Llc Div Everlube Products a Div.of Metal Improvement Company, Llc (USA) |
| TECTYL 848D PRIMARY | Valvoline Inc Div Oem Group (USA) |
| TECTYL 848D HF PRIMARY | Daubert Chemical Company, Inc. (USA) |
| LONE STAR L.S.-5941 PRIMARY | Longhorn State Enterprise, Inc Dba Lone Star Lubricants (USA) |
| 1550301-44 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| TECTYL 848D HF | 5/9 Secondary reference Daubert Chemical Co |
| 1550301-44 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 1550301-44 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 1603000-B | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 1550301 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 1603000-B | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-474-8790 is a Washer,flat, manufactured by Metal Improvement Co Llc Div Everlube Products a Div.of Metal Improvement Company, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-474-8790 has 6 manufacturer part numbers on file: 1603000-B (Oxy Metal Industries Corp Parker Co the), KRONAPLATE 5941 (Metal Improvement Co Llc Div Everlube Products a Div.of Metal Improvement Company, Llc), TECTYL 848D (Valvoline Inc Div Oem Group), TECTYL 848D HF (Daubert Chemical Company, Inc.), LONE STAR L.S.-5941 (Longhorn State Enterprise, Inc Dba Lone Star Lubricants) and 1 more.
Key specifications for KRONAPLATE 5941: Surface Finish: 250.0 MICROINCHES ALL SURFACES; Surface Treatment Document and Classification: DOD-P-16232,TYPE M,CLASS 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.250 INCHES NOMINAL IN; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM. 12 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.