The Washer,flat, cataloged under National Stock Number 5310-01-556-6643, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-556-6643 |
| Primary Part Number | 40218 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — No Item Name Available |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Material | STEEL OVERALL |
| Peripheral Shape Style | ROUND |
| Thickness | 0.8 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Hole Diameter | 4.30 MILLIMETERS MINIMUM AND 4.48 MILLIMETERS MAXIMUM MM |
| Center Hole Shape Style | ROUND |
| Hardness Rating | 140.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 250.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM |
| Overall Diameter | 9.0 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 12KP180 | Oshkosh Defense Llc (USA) |
| 5320000005-00 | Nd Defense Llc (USA) |
| 40218 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
| 12759-00581 | Fastenal Company Dba Fastenal Co (USA) |
| 12KP180 | Oshkosh Corp (USA) |
NSN 5310-01-556-6643 is a Washer,flat, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310 (No Item Name Available). Status: active.
NSN 5310-01-556-6643 has 5 cross-referenced part numbers: 12KP180 (Oshkosh Defense Llc), 5320000005-00 (Nd Defense Llc), 40218 (Fastenal Company Dba Fastenal Co), 12759-00581 (Fastenal Company Dba Fastenal Co), 12KP180 (Oshkosh Corp).
There are 11 known substitutes for 5310-01-556-6643: 5999-00-030-1996, 5120-00-189-7932, 9340-00-245-7107 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 40218: Material: STEEL OVERALL; Peripheral Shape Style: ROUND; Thickness: 0.8 MILLIMETERS NOMINAL MM; Cross-Sectional Shape Style: RECTANGULAR. 10 total characteristics are documented in the Federal Logistics Information System.