NSN 4820-00-052-3593 · NIIN 000523593 · Part number 250-3/4-75
Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 39305
Government record, cited
NSN 4820-00-052-3593 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-052-3593. Manufacturer of record part number: 250-3/4-75.
Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS
Style Designator: ANGLE
Bonnet Type: INSIDE SPRING
Thread Direction: RIGHT-HAND ALL ENDS
Nominal Thread Size: 0.750 INCHES ALL ENDS IN
Disk Loading Method: SPRING
Identification
NSN: 4820-00-052-3593
NIIN: 000523593
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 250-3/4-75
Manufacturer: Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-00-052-3593, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-052-3593
Primary Part Number
250-3/4-75
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div
Status
ACTIVE
Flow Control Device
DISK
Connection Style
PLAIN,OPTIONAL END(PIPE) ALL ENDS
Style Designator
ANGLE
Bonnet Type
INSIDE SPRING
Thread Direction
RIGHT-HAND ALL ENDS
Nominal Thread Size
0.750 INCHES ALL ENDS IN
Disk Loading Method
SPRING
Bonnet Attachment Method
BOLTED
Material
COPPER ALLOY BODY
Material
COPPER ALLOY STEM
Material
SILICON FLOW CONTROL DEVICE
Material
COPPER ALLOY SEAT
Thread Series Designator
NPT ALL ENDS
Opening Pressure Setting
75.0 POUNDS PER SQUARE INCH LBS
Valve Operation Method
MANUAL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5330-00-119-420918249APOSSIBLE MATCH
GASKET
Possible match (shared part number)Brinkley Technology Group Llc Dba Hercules Manufacturing
3960-00-697-845323075POSSIBLE MATCH
BEARING,CONTACT
Possible match (shared part number)Otis Elevator Co Sub of United Technologies Corp
5360-00-799-296522300160POSSIBLE MATCH
SPRING,CHRONOGRAPH
Possible match (shared part number)Waltham Aircraft Clock Corp
6110-00-824-214723075POSSIBLE MATCH
STARTER,MOTOR
Possible match (shared part number)Ward Leonard Ct Llc
5315-00-926-011923075POSSIBLE MATCH
KEY,MACHINE
Possible match (shared part number)Industrial Technologies and Services Llc
5950-01-069-6079POSSIBLE MATCH
TRANSFORMER,RADIO FREQUENCY
Possible match (shared part number)
3830-01-210-926023075POSSIBLE MATCH
CONNECTOR,BUTT
Possible match (shared part number)Barnes Group Inc. Dba Barnes Distribution
5345-01-364-3294POSSIBLE MATCH
WHEEL,ABRASIVE
Possible match (shared part number)
4720-01-391-938523075POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Electro Impulse Laboratory Inc Dba Electro Impulse Inc
Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div (USA)
Reference documents
Reference
Meaning
230-75
5/9Secondary reference
Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div
Related Parts
5330-00-119-4209POSSIBLE MATCH
GASKET
18249A
3960-00-697-8453POSSIBLE MATCH
BEARING,CONTACT
23075
5360-00-799-2965POSSIBLE MATCH
SPRING,CHRONOGRAPH
22300160
6110-00-824-2147POSSIBLE MATCH
STARTER,MOTOR
23075
5315-00-926-0119POSSIBLE MATCH
KEY,MACHINE
23075
5950-01-069-6079POSSIBLE MATCH
TRANSFORMER,RADIO FREQUENCY
3830-01-210-9260POSSIBLE MATCH
CONNECTOR,BUTT
23075
5345-01-364-3294POSSIBLE MATCH
WHEEL,ABRASIVE
4720-01-391-9385POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
23075
Frequently Asked Questions
What is NSN 4820-00-052-3593?
NSN 4820-00-052-3593 is a Valve,safety Relief, manufactured by Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-052-3593?
NSN 4820-00-052-3593 has 1 manufacturer part number on file: 250-3/4-75 (Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div).
What NSN replaces 4820-00-052-3593?
9 possible matches (shared part number, not a government interchangeability claim): 5330-00-119-4209, 3960-00-697-8453, 5360-00-799-2965. Verify interchangeability with system specifications before substitution.
What are the specifications of 250-3/4-75?
Key specifications for 250-3/4-75: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Style Designator: ANGLE; Bonnet Type: INSIDE SPRING. 15 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-052-3593 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.