The Guide,valve Stem, cataloged under National Stock Number 4310-01-384-0965, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-384-0965 |
| Primary Part Number | 254-6556644FNCOTM-A63 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Major Diameter Length | 0.250 INCHES NOMINAL IN |
| Bb End Shank Diameter | 0.671 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Bore Counterbore | INCLUDED |
| Outside Diameter | 2.495 INCHES NOMINAL IN |
| Counterbore Depth | 2.250 INCHES NOMINAL IN |
| Counterbore Location | AA END |
| Counterbore Diameter | 0.312 INCHES NOMINAL IN |
| Bb End Chamfer Length | 0.160 INCHES NOMINAL IN |
| Bb End Chamfer Angle in Deg | 30.0 |
| Bore Diameter | 0.2700 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| Shoulder First Fillet Radius | 0.010 INCHES NOMINAL IN |
| Bore Countersink | NOT INCLUDED |
| 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 |
|---|---|
| 254-6556644FNCOTM-A63 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4310-01-384-0965 is a Guide,valve Stem, manufactured by Naval Sea Systems Command, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-384-0965 has 1 manufacturer part number on file: 254-6556644FNCOTM-A63 (Naval Sea Systems Command).
Key specifications for 254-6556644FNCOTM-A63: Major Diameter Length: 0.250 INCHES NOMINAL IN; Bb End Shank Diameter: 0.671 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED; Overall Length: 2.750 INCHES NOMINAL IN. 14 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.