The Sleeve,retainer, cataloged under National Stock Number 4520-00-976-2253, 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 Suntec Industries Inc Del Dba Suntec. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Sleeve,retainer |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Suntec Industries Inc Del Dba Suntec (CAGE 1Y370) |
| Parameter | Value |
|---|---|
| NSN | 4520-00-976-2253 |
| Primary Part Number | 121732 |
| Item Name | Sleeve,retainer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Suntec Industries Inc Del Dba Suntec |
| 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 |
|---|---|
| 121732 PRIMARY | Suntec Industries Inc Del Dba Suntec (USA) |
| Reference | Meaning |
|---|---|
| 121732 | C/1 Advisory reference — outside the item-of-supply concept Sundstrand Corp |
| 121732 | 5/9 Secondary reference U.S. Government activity |
NSN 4520-00-976-2253 is a Sleeve,retainer, manufactured by Suntec Industries Inc Del Dba Suntec, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-976-2253 has 1 manufacturer part number on file: 121732 (Suntec Industries Inc Del Dba Suntec).
3 possible matches (shared part number, not a government interchangeability claim): 5325-01-191-7341, 5325-01-311-6041, 4720-01-614-9884. Verify interchangeability with system specifications before substitution.
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.