The Header Assembly,heater Duct, cataloged under National Stock Number 2990-00-313-2138, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Roper Industries Inc Roper Pump Co Div. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-313-2138 |
| Primary Part Number | 502C374 |
| Item Name | Header Assembly,heater Duct |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Roper Industries Inc Roper Pump Co Div |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM TUBING,0.0625IN. WALL THK,WELDED SEAMS,4.250 IN. DUCT LG,ONE END 2.000 OD,OTHER END 1.500 IN. OD 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 |
|---|---|
| 502C374 | Roper Industries Inc Roper Pump Co Div (USA) |
| Reference | Meaning |
|---|---|
| 2681A | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-00-313-2138 is a Header Assembly,heater Duct, manufactured by Roper Industries Inc Roper Pump Co Div, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-313-2138 has 1 manufacturer part number on file: 502C374 (Roper Industries Inc Roper Pump Co Div).
Key specifications for 502C374: General Characteristics Item Description: ALUMINUM TUBING,0.0625IN. WALL THK,WELDED SEAMS,4.250 IN. DUCT LG,ONE END 2.000 OD,OTHER END 1.500 IN. OD IN. 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.