The Valve,globe, cataloged under National Stock Number 4820-01-055-0181, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. Government technical data includes 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-055-0181 |
| Primary Part Number | SS-31RS4 |
| Item Name | Valve,globe |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Furnished Items and Quantity | 2 NUT AND 4 FERRULE |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | AISI 440C ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | AAISI 440C MIL SPEC ALL MATERIAL RESPONSES STEM |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | INSIDE SCREW |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Facility | BULKHEAD |
| Bonnet Attachment Method | UNION |
| Media for Which Designed | HYDRAULIC FLUID, MINERAL BASE SECOND RESPONSE |
| Media for Which Designed | GAS, NATURAL FIRST RESPONSE |
| Thread Class | 2A ALL ENDS A |
| Material | STEEL COMP 440A FLOW CONTROL DEVICE A |
| Material | STEEL COMP 440A STEM A |
| Material | STEEL COMP 316 BODY |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE PACKING |
| Material | STEEL COMP 316 SEAT |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| SS-31RS4 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| SS-31RS4 | 5/9 Secondary reference Whitey Co |
NSN 4820-01-055-0181 is a Valve,globe, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-055-0181 has 1 manufacturer part number on file: SS-31RS4 (Swagelok Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-586-7259. Verify interchangeability with system specifications before substitution.
Key specifications for SS-31RS4: Flow Control Device: NEEDLE; Furnished Items and Quantity: 2 NUT AND 4 FERRULE; Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 24 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.