The Register,air, cataloged under National Stock Number 4520-01-616-0553, 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 Mcmaster-Carr Supply Co. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-616-0553 |
| Primary Part Number | 2009K1 |
| Item Name | Register,air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Thickness | 0.310 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Frame Type | FLAT |
| Frame Removability | ANY ACCEPTABLE |
| Material | STEEL |
| Grille Quantity | 1 |
| 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 |
|---|---|
| 2009K1 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 08018B4017 | 7/2 Vendor item drawing reference Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service |
NSN 4520-01-616-0553 is a Register,air, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-616-0553 has 1 manufacturer part number on file: 2009K1 (Mcmaster-Carr Supply Co).
Key specifications for 2009K1: Overall Thickness: 0.310 INCHES NOMINAL IN; Shape: RECTANGULAR; Overall Length: 13.750 INCHES NOMINAL IN; Overall Width: 7.812 INCHES NOMINAL IN. 6 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.