The Cap,upper, cataloged under National Stock Number 1660-00-166-6458, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Grimes Aerospace Company. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-166-6458 |
| Primary Part Number | 50D30 |
| Item Name | Cap,upper |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| General Characteristics Item Description | CRES,AMS5640 OR MIL-S-7720,TYPE 303;PASSIVATED FINISH;IRREGULARSHAPE 1.38 IN. LG,0.75 IN. W,0.235 IN. H O/A;TWO 0.177 IN. DIA HOLES,1.00 IN. C TO C;0.252 IN. MIN.,0.254 IN. MAX BORE DIA;COUNTERBORED,0.359 IN. MIN.,0.361 IN. MAX DIA,0.090 IN. DEEP;0.110 IN. THK FLANGE;0.465 IN. MIN.,0.467 IN. MAX DIA BODY IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 50D30 PRIMARY | Grimes Aerospace Company (USA) |
NSN 1660-00-166-6458 is a Cap,upper, manufactured by Grimes Aerospace Company, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-166-6458 has 1 manufacturer part number on file: 50D30 (Grimes Aerospace Company).
Key specifications for 50D30: General Characteristics Item Description: CRES,AMS5640 OR MIL-S-7720,TYPE 303;PASSIVATED FINISH;IRREGULARSHAPE 1.38 IN. LG,0.75 IN. W,0.235 IN. H O/A;TWO 0.177 IN. DIA HOLES,1.00 IN. C TO C;0.252 IN. MIN.,0.254 IN. MAX BORE DIA;COUNTERBORED,0.359 IN. MIN.,0.361 IN. MAX DIA,0.090 IN. DEEP;0.110 IN. THK FLANGE;0.465 IN. MIN.,0.467 IN. MAX DIA BODY 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.
NSN 1660-00-166-6458 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.