The Valve,safety Relief, cataloged under National Stock Number 4820-00-446-8381, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-446-8381 |
| Primary Part Number | SK1156 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Disk Loading Method | SPRING |
| Bonnet Type | INSIDE SCREW |
| Surface Treatment | ANODIZE LOCATION NOT OTHERWISE SPECIFIED |
| Material | PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) FLOW CONTROL DEVICE |
| Flow Control Device | BALL |
| Bonnet Attachment Method | INTEGRAL |
| Valve Operation Method | AUTOMATIC |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-446-8381 is a Valve,safety Relief, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-446-8381 has 2 cross-referenced part numbers: 561309 (Lockheed Martin Corporation Div Rms - Mitchel Field), SK1156 (Howell Laboratories Inc Dba Howell Laboratories Inc).
There is 1 known substitute for 4820-00-446-8381: 2530-00-980-3239. Verify interchangeability with system specifications before substitution.
Key specifications for SK1156: Disk Loading Method: SPRING; Bonnet Type: INSIDE SCREW; Surface Treatment: ANODIZE LOCATION NOT OTHERWISE SPECIFIED; Material: PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) FLOW CONTROL DEVICE. 8 total characteristics are documented in the Federal Logistics Information System.