The Washer,flat, cataloged under National Stock Number 5310-01-394-2730, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-394-2730 |
| Primary Part Number | KAC11286-40011-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Charles Reed Knight Jr Dba Knight's Armament Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TY2CL1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.375 INCHES NOMINAL IN |
| Hardness Rating | 29.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4130 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.800 INCHES NOMINAL IN |
| Thickness | 0.250 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 |
|---|---|
| KAC11286-40011-1 PRIMARY | Charles Reed Knight Jr Dba Knight's Armament Company (USA) |
NSN 5310-01-394-2730 is a Washer,flat, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-394-2730 has 1 manufacturer part number on file: KAC11286-40011-1 (Charles Reed Knight Jr Dba Knight's Armament Company).
Key specifications for KAC11286-40011-1: Surface Treatment Document and Classification: QQ-P-416 TY2CL1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.375 INCHES NOMINAL IN; Hardness Rating: 29.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR. 11 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.