The Disk,valve, cataloged under National Stock Number 1650-00-971-2601, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is S & L Aerospace Metals Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-971-2601 |
| Primary Part Number | 128HM10307-1 |
| Item Name | Disk,valve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | S & L Aerospace Metals Llc |
| Status | ACTIVE |
| Shank Diameter | 0.281 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 1.037 INCHES NOMINAL IN |
| Flange Diameter | 0.621 INCHES NOMINAL IN |
| Style Designator | CONE CHECK |
| Material Document and Classification | QQ-S-763, CLASS 440C, COND A FED SPEC SINGLE MATERIAL RESPONSE |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Under Flange Height | 0.181 INCHES NOMINAL IN |
| Media for Which Designed | HYDRAULIC FLUID |
| Material | STEEL COMP 440C |
| 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 |
|---|---|
| 128HM10307-1 PRIMARY | S & L Aerospace Metals Llc (USA) |
| Reference | Meaning |
|---|---|
| 128HM10307-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 128HM10307-1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 1650-00-971-2601 is a Disk,valve, manufactured by S & L Aerospace Metals Llc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-971-2601 has 1 manufacturer part number on file: 128HM10307-1 (S & L Aerospace Metals Llc).
Key specifications for 128HM10307-1: Shank Diameter: 0.281 INCHES NOMINAL IN; Flange Seat to Disk End Height: 1.037 INCHES NOMINAL IN; Flange Diameter: 0.621 INCHES NOMINAL IN; Overall Height: 1.218 INCHES NOMINAL IN. 9 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.