The Washer,flat, cataloged under National Stock Number 5310-01-628-1649, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hoffman Engineering, Llc Dba Hoffman Engineering Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-628-1649 |
| Primary Part Number | 725-1013-0620 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hoffman Engineering, Llc Dba Hoffman Engineering Llc |
| Status | ACTIVE |
| Overall Diameter | 1.250 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.190 INCHES MINIMUM 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 |
|---|---|
| 725-1013-0620 PRIMARY | Hoffman Engineering, Llc Dba Hoffman Engineering Llc (USA) |
| Reference | Meaning |
|---|---|
| 725-1013-9001 ITEM 31 | C/1 Advisory reference — outside the item-of-supply concept Hoffman Engineering, Llc Dba Hoffman Engineering Llc |
NSN 5310-01-628-1649 is a Washer,flat, manufactured by Hoffman Engineering, Llc Dba Hoffman Engineering Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-628-1649 has 1 manufacturer part number on file: 725-1013-0620 (Hoffman Engineering, Llc Dba Hoffman Engineering Llc).
Key specifications for 725-1013-0620: Overall Diameter: 1.250 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Part Name Assigned by Controlling Agency: NO. 10 LOCKNUT SS. 6 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.