The Valve,safety Relief, cataloged under National Stock Number 4820-00-460-4007, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gast Mfg Corp. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-460-4007 |
| Primary Part Number | AS100G |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Gast Mfg Corp |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Connection Style | INVERTED FLARE (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Seat Angle | 30.0 DEGREES FIRST END |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | THREADED |
| Material | COPPER ALLOY BODY |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | NPTF FIRST END |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| AS100G PRIMARY | Gast Mfg Corp (USA) |
| Reference | Meaning |
|---|---|
| AT517A | 5/9 Secondary reference Gast Mfg Corp |
| AF570S | 5/9 Secondary reference Gast Mfg Corp |
NSN 4820-00-460-4007 is a Valve,safety Relief, manufactured by Gast Mfg Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-460-4007 has 1 manufacturer part number on file: AS100G (Gast Mfg Corp).
Key specifications for AS100G: Flow Control Device: BALL; Connection Style: INVERTED FLARE (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Style Designator: STRAIGHT THRU. 15 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.