The Washer,flat, cataloged under National Stock Number 5310-01-441-2931, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Pti Technologies Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-441-2931 |
| Primary Part Number | 2731708 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Pti Technologies Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 2731708 PRIMARY | Pti Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2731708 | 3/9 Design control — primary reference Vacco Industries |
| 2731708 | 5/9 Secondary reference Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator |
NSN 5310-01-441-2931 is a Washer,flat, manufactured by Pti Technologies Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-441-2931 has 1 manufacturer part number on file: 2731708 (Pti Technologies Inc.).
Key specifications for 2731708: Special Features: MATERIAL STATES 300 SER CRES; End Item Identification: 2731703,EI271-042M4. 0 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.