The Boiler,heating,low Pressure, cataloged under National Stock Number 4520-01-322-1049, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Burnham Holdings, Inc.. Government technical data includes 9 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-322-1049 |
| Primary Part Number | RSA135LN-TB |
| Item Name | Boiler,heating,low Pressure |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Burnham Holdings, Inc. |
| Status | ACTIVE |
| Pressure Rating | 30.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Current Type | AC |
| Firing Type | OIL |
| Heating System Design | HOT WATER |
| Boiler Type | HORIZONTAL FIRE TUBE |
| Jacket Inclosure Feature | INCLUDED |
| Material | STEEL |
| Heat Delivery Rate in Btu Per Hour | 140000.0 |
| Furnished Items and Quantity | FLUE COLLAR 1,3 IN. BOILER TUBES 4,TIPPED TURBULATOR 4 IN |
| 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 |
|---|---|
| RSA135LN-TB PRIMARY | Burnham Holdings, Inc. (USA) |
| Reference | Meaning |
|---|---|
| RS113 | 5/9 Secondary reference Burnham Holdings, Inc. |
NSN 4520-01-322-1049 is a Boiler,heating,low Pressure, manufactured by Burnham Holdings, Inc., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-322-1049 has 1 manufacturer part number on file: RSA135LN-TB (Burnham Holdings, Inc.).
Key specifications for RSA135LN-TB: Overall Height: 44.000 INCHES NOMINAL IN; Pressure Rating: 30.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Current Type: AC; Firing Type: OIL. 9 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.