The Head Assembly, cataloged under National Stock Number 4310-00-101-2777, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Atlas Copco Holyoke Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Head Assembly |
| FSC / FSG | 4310 — Compressors and Vacuum Pumps (FSG 43) |
| Manufacturers | Atlas Copco Holyoke Inc (CAGE 59379); Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (CAGE 8FGX3) |
| Parameter | Value |
|---|---|
| NSN | 4310-00-101-2777 |
| Primary Part Number | HD 00805 |
| Item Name | Head Assembly |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Atlas Copco Holyoke Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| HD 00805 PRIMARY | Atlas Copco Holyoke Inc (USA) |
| 4630N PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 4630N | 5/9 Secondary reference U.S. Government activity |
| 4630N | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| HD805 | 5/9 Secondary reference U.S. Government activity |
| 4630N | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
NSN 4310-00-101-2777 is a Head Assembly, manufactured by Atlas Copco Holyoke Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-101-2777 has 2 manufacturer part numbers on file: HD 00805 (Atlas Copco Holyoke Inc), 4630N (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
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.