The Washer,flat, cataloged under National Stock Number 5310-01-605-8743, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Maritime Applied Physics Corporation Dba Blacksea Technologies. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-605-8743 |
| Primary Part Number | 122-1-012 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Maritime Applied Physics Corporation Dba Blacksea Technologies |
| Status | ACTIVE |
| Overall Diameter | 5.5 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 932 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 3.510 INCHES NOMINAL IN |
| Thickness | 1.25 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 |
|---|---|
| 122-1-012 PRIMARY | Maritime Applied Physics Corporation Dba Blacksea Technologies (USA) |
| 120-0-004P REV C NO.6 | Maritime Applied Physics Corporation Dba Blacksea Technologies (USA) |
NSN 5310-01-605-8743 is a Washer,flat, manufactured by Maritime Applied Physics Corporation Dba Blacksea Technologies, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-605-8743 has 2 manufacturer part numbers on file: 122-1-012 (Maritime Applied Physics Corporation Dba Blacksea Technologies), 120-0-004P REV C NO.6 (Maritime Applied Physics Corporation Dba Blacksea Technologies).
Key specifications for 122-1-012: Overall Diameter: 5.5 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Part Name Assigned by Controlling Agency: THRUST WASHER. 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.