The Ball Seat Insert, cataloged under National Stock Number 4210-01-040-6890, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4210-01-040-6890 |
| Primary Part Number | 810-1385835 PIECE 6 |
| Item Name | Ball Seat Insert |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | BRONZE,MIL-B-16444; 3.000 IN. OD,0.625 IN. O/A H; TOP END HAS TWO ELONGATED HOLES,1ST HOLE 2.250 IN. LG BY 1.062 IN. W,2ND HOLE 2.031 IN. LG BY 1.062 IN. W; BOTTOM END HAS EIGHT SLOTS,0.375 IN. W BY 0.188 IN. DEEP,EQUALLY SPACED 45 DEG APART IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 810-1385835 PIECE 6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 810-1385835 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4210-01-040-6890 is a Ball Seat Insert, manufactured by Naval Sea Systems Command, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-01-040-6890 has 1 manufacturer part number on file: 810-1385835 PIECE 6 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-041-4985, 4210-01-132-3599. Verify interchangeability with system specifications before substitution.
Key specifications for 810-1385835 PIECE 6: General Characteristics Item Description: BRONZE,MIL-B-16444; 3.000 IN. OD,0.625 IN. O/A H; TOP END HAS TWO ELONGATED HOLES,1ST HOLE 2.250 IN. LG BY 1.062 IN. W,2ND HOLE 2.031 IN. LG BY 1.062 IN. W; BOTTOM END HAS EIGHT SLOTS,0.375 IN. W BY 0.188 IN. DEEP,EQUALLY SPACED 45 DEG APART IN; End Item Identification: 4210003922944. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.