The Processing Unit Pho, cataloged under National Stock Number 6740-00-521-0652, is classified within Federal Supply Class 6740 (Photographic Developing and Finishing Equipment) of the Photographic Equipment group. The manufacturer of record is Westates Carbon Co. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Processing Unit Pho |
| FSC / FSG | 6740 — Photographic Developing and Finishing Equipment (FSG 67) |
| Manufacturers | Westates Carbon Co (CAGE 62089) |
| Parameter | Value |
|---|---|
| NSN | 6740-00-521-0652 |
| Primary Part Number | H1H401 |
| Item Name | Processing Unit Pho |
| FSC / FSG | 6740 / 67 — Photographic Developing and Finishing Equipment |
| Manufacturer | Westates Carbon Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| H1H401 PRIMARY | Westates Carbon Co (USA) |
| Reference | Meaning |
|---|---|
| B5A | 5/9 Secondary reference U.S. Government activity |
| H1H401 | 5/9 Secondary reference Incom Intl Inc Morse Controls Div |
NSN 6740-00-521-0652 is a Processing Unit Pho, manufactured by Westates Carbon Co, classified under FSC 6740, Photographic Developing and Finishing Equipment. Status: active.
NSN 6740-00-521-0652 has 1 manufacturer part number on file: H1H401 (Westates Carbon Co).
1 possible match (shared part number, not a government interchangeability claim): 3455-01-366-6357. Verify interchangeability with system specifications before substitution.
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.