NSN 4820-01-525-8580 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-525-8580. Manufacturer of record part number: 4138A057.
The Valve,safety Relief, cataloged under National Stock Number 4820-01-525-8580, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Perkins Engines Inc. Government technical data includes 2 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. Current acquisition status: Active.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-525-8580?
NSN 4820-01-525-8580 is a Valve,safety Relief, manufactured by Perkins Engines Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-525-8580?
NSN 4820-01-525-8580 has 3 manufacturer part numbers on file: 02/202529 (Jc Bamford Excavators Ltd), 4138A057 (Perkins Engines Company Ltd - Perkins Parts Distribution Centre Uk), 4138A057 (Perkins Engines Inc).
What are the specifications of 4138A057?
Key specifications for 4138A057: Disk Loading Method: SPRING; Part Name Assigned by Controlling Agency: RELIEF VALVE ASSEMBLY; End Item Identification: LIFTKING ROUGH TERRAIN FORKLIFT; Valve Operation Method: AUTOMATIC. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-525-8580 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.