The Valve,safety Relief, cataloged under National Stock Number 4820-01-451-3758, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-451-3758 |
| Primary Part Number | 7005617-1D1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) FIRST END |
| Minimum Operating Temp | -20.0 FAHRENHEIT DEGF |
| Criticality Code Justification | ZZZY |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Media for Which Designed | FUEL/OIL, HYDROCARBON FIRST RESPONSE |
| Media for Which Designed | OIL, LUBRICATING, DIESTER BASE SECOND RESPONSE |
| Media for Which Designed | HYDRAULIC FLUID, SILICATE-ESTER BASE THIRD RESPONSE |
| Thread Class | 2A FIRST END A |
| Material | STEEL COMP 316 BODY |
| Thread Series Designator | UNF FIRST END |
| Opening Pressure Setting | 2.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P9290 SYSTEM CERTIFICATION PROCEDURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS AND REQUIRES CLEANING, PACKING, AND MARKING IAW MIL-STD-1622 OR MIL-STD-1330 AS DEEMED APPLICABLE; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICALS AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 7005617-1D1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7005617D1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 532-T1-4D-2D1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 7005617 | D/9 Drawing number reference only Naval Sea Systems Command |
| 532-T1-4D-2 | 5/1 Secondary reference U.S. Government activity |
| 7005617-1 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4820-01-451-3758 is a Valve,safety Relief, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-3758 has 3 manufacturer part numbers on file: 7005617-1D1 (Naval Inventory Control Point Mechanicsburg), 7005617D1 (Naval Inventory Control Point Mechanicsburg), 532-T1-4D-2D1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 7005617-1D1: Connection Style: PLAIN (TUBE) FIRST END; Minimum Operating Temp: -20.0 FAHRENHEIT DEGF; Criticality Code Justification: ZZZY; Connection Type: THREADED EXTERNAL TUBE FIRST END. 19 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.