The Washer,concave, cataloged under National Stock Number 5310-01-327-9603, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. The record lists 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Washer,concave |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Reid Products Inc. Dba Reid Products Inc (CAGE 59563); Howmet Global Fastening Systems Inc (CAGE 15653); Huck International, Inc (CAGE 17446); The Boeing Company Div Defense (CAGE 76301) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-327-9603 |
| Primary Part Number | ST3M469C3M |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| TLN1023CD3-3W | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TLN1023CD3-3W | Reid Products Inc. Dba Reid Products Inc (USA) |
| K49661-3 | Howmet Global Fastening Systems Inc (USA) |
| TLN1023CD3-3W | Huck International, Inc (USA) |
| ST3M469C3M PRIMARY | The Boeing Company Div Defense (USA) |
| TLN1023CD3-3W | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| TLN1023CD3-3W | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-327-9603 is a Washer,concave, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-327-9603 has 6 manufacturer part numbers on file: TLN1023CD3-3W (Sps Technologies, Llc Dba PB Fasteners), TLN1023CD3-3W (Reid Products Inc. Dba Reid Products Inc), K49661-3 (Howmet Global Fastening Systems Inc), TLN1023CD3-3W (Huck International, Inc), ST3M469C3M (The Boeing Company Div Defense) and 1 more.
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.