The Washer,flat, cataloged under National Stock Number 5310-01-669-0182, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mct Industries, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-669-0182 |
| Primary Part Number | 1330-1656-10 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mct Industries, Inc. |
| Status | ACTIVE |
| Overall Diameter | 2.100 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | BLANK RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.766 INCHES NOMINAL IN |
| Thickness | 0.380 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 |
|---|---|
| 1330-1656-10 PRIMARY | Mct Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1330-1656 | D/9 Drawing number reference only Mct Industries, Inc. |
NSN 5310-01-669-0182 is a Washer,flat, manufactured by Mct Industries, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-669-0182 has 1 manufacturer part number on file: 1330-1656-10 (Mct Industries, Inc.).
Key specifications for 1330-1656-10: Overall Diameter: 2.100 INCHES NOMINAL IN; Cross-Sectional Shape Style: BLANK RECTANGULAR; Special Features: MATERIAL ASTM A572 GR 50; Peripheral Shape Style: ROUND. 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.