The Washer,flat, cataloged under National Stock Number 5310-01-133-5846, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-133-5846 |
| Primary Part Number | 1543622 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Overall Diameter | 0.938 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYAMIDE NYLON AND PAPER OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.390 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Thickness | 0.060 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 |
|---|---|
| 1543622 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| 1543622 | Honeywell International Inc. Dba Honeywell International (USA) |
| 1543622 | Aero International, Llc Dba Ams Engineered Solutions (USA) |
| Reference | Meaning |
|---|---|
| 1543622 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-133-5846 is a Washer,flat, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-133-5846 has 3 manufacturer part numbers on file: 1543622 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 1543622 (Honeywell International Inc. Dba Honeywell International), 1543622 (Aero International, Llc Dba Ams Engineered Solutions).
Key specifications for 1543622: Overall Diameter: 0.938 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Special Features: TWO WASHERS 0.030 IN. THK BONDED TOGETHER IN; 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.