The Register,metal, cataloged under National Stock Number 4520-01-303-3256, 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 Williams Aerospace & Manufacturing Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-303-3256 |
| Primary Part Number | 976830-101 |
| Item Name | Register,metal |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Williams Aerospace & Manufacturing Inc |
| Status | ACTIVE |
| Shape | RECTANGULAR |
| Frame Type | FLAT |
| Grille Bar Position | HORIZONTAL |
| Frame Removability | ANY ACCEPTABLE |
| Deflector Blade Operating Method | HAND-LEVER |
| Material | STEEL |
| Grille Perforated Shape | SQUARE |
| 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 |
|---|---|
| 976830-101 PRIMARY | Williams Aerospace & Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| 976830-101 | 5/9 Secondary reference U.S. Government activity |
NSN 4520-01-303-3256 is a Register,metal, manufactured by Williams Aerospace & Manufacturing Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-303-3256 has 1 manufacturer part number on file: 976830-101 (Williams Aerospace & Manufacturing Inc).
Key specifications for 976830-101: Shape: RECTANGULAR; Frame Type: FLAT; Grille Bar Position: HORIZONTAL; Frame Removability: ANY ACCEPTABLE. 7 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.