The Washer,flat, cataloged under National Stock Number 5310-01-180-7156, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div Ocean Systems. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-180-7156 |
| Primary Part Number | 3322757-4 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | L3 Technologies, Inc. Div Ocean Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-P-47090 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.312 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6721,300 SERIES MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.193 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Thickness | 0.032 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 |
|---|---|
| T0071184 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| 3322757-4 PRIMARY | L3 Technologies, Inc. Div Ocean Systems (USA) |
| T0071184 | Leonardo S.p.a. Div Electronics (ITA) |
| Reference | Meaning |
|---|---|
| 3322757-4 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 5310-01-180-7156 is a Washer,flat, manufactured by L3 Technologies, Inc. Div Ocean Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-180-7156 has 3 manufacturer part numbers on file: T0071184 (Leonardo Spa Helicopters Division - Production Site), 3322757-4 (L3 Technologies, Inc. Div Ocean Systems), T0071184 (Leonardo S.p.a. Div Electronics).
Key specifications for 3322757-4: Surface Treatment Document and Classification: MIL-P-47090 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.312 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6721,300 SERIES MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.