The Spool, cataloged under National Stock Number 4530-01-030-8591, is classified within Federal Supply Class 4530 (Fuel Burning Equipment Units) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Babcock & Wilcox Co. 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through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4530-01-030-8591 |
| Primary Part Number | 1187F-4PC42 |
| Item Name | Spool |
| FSC / FSG | 4530 / 45 — Fuel Burning Equipment Units |
| Manufacturer | Babcock & Wilcox Co |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL,CAST STEEL,CLASS CW PER MIL-S-15083 |
| 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 |
|---|---|
| 1187F-4PC42 PRIMARY | Babcock & Wilcox Co (USA) |
| Reference | Meaning |
|---|---|
| 7002048 | 5/9 Secondary reference The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 7002048 | C/1 Advisory reference — outside the item-of-supply concept Babcock & Wilcox Co |
| 51362B | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 1187F-4 | 5/9 Secondary reference Babcock & Wilcox Co |
| MX-261193-3 PIECE 42 | C/1 Advisory reference — outside the item-of-supply concept The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 69661D | 5/9 Secondary reference The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 69661DPC42 | 5/9 Secondary reference The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 1184F1PC42 | 5/9 Secondary reference Babcock & Wilcox Co |
| 1184F | 5/9 Secondary reference Babcock & Wilcox Co |
| 1187F1PC42 | C/1 Advisory reference — outside the item-of-supply concept Babcock & Wilcox Co |
| 69661DPC42 | C/1 Advisory reference — outside the item-of-supply concept Babcock & Wilcox Co |
NSN 4530-01-030-8591 is a Spool, manufactured by Babcock & Wilcox Co, classified under FSC 4530, Fuel Burning Equipment Units. Status: active.
NSN 4530-01-030-8591 has 1 manufacturer part number on file: 1187F-4PC42 (Babcock & Wilcox Co).
1 possible match (shared part number, not a government interchangeability claim): 4530-01-154-6423. Verify interchangeability with system specifications before substitution.
Key specifications for 1187F-4PC42: General Characteristics Item Description: MATERIAL,CAST STEEL,CLASS CW PER MIL-S-15083. 1 specification is 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.