NSN 4820-00-595-2255 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-595-2255. Manufacturer of record part number: 91LW10451.
Also searched as4820-00-595-2255 ·
4820005952255 ·
NIIN 005952255 ·
00-595-2255 ·
FSC 4820 Valves, Nonpowered · CAGE 26505 · 91LW10451
Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection Type: THREADED INTERNAL PIPE ALL ENDS
Style Designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
Adjustable Pressure Range: +25.0 TO 400.0 POUNDS PER SQUARE INCH LBS
Thread Direction: RIGHT-HAND ALL ENDS
Nominal Thread Size: 0.250 INCHES ALL ENDS IN
Identification
NSN: 4820-00-595-2255
NIIN: 005952255
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 91LW10451
Manufacturer: Grove Valve Operations
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-00-595-2255, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. Government technical data includes 10 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-595-2255
Primary Part Number
91LW10451
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Grove Valve Operations
Status
ACTIVE
Flow Control Device
DISK
Connection Style
PLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection Type
THREADED INTERNAL PIPE ALL ENDS
Style Designator
STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
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 4820-00-595-2255?
NSN 4820-00-595-2255 is a Valve,safety Relief, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-595-2255?
NSN 4820-00-595-2255 has 1 manufacturer part number on file: 91LW10451 (Grove Valve Operations).
What are the specifications of 91LW10451?
Key specifications for 91LW10451: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.. 10 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-595-2255 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.