PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

665-11-6D27Valve,safety Relief

Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division · NSN 4820-00-087-2894 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-087-2894 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-087-2894. Primary manufacturer part number: 665-11-6D27.
Features
  • Valve,safety Relief — FSC 4820
  • Disk Loading Method: SPRING
  • Valve Operation Method: AUTOMATIC
  • Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
  • Connection Style: GASKET SEAL(BOSS) ALL ENDS
  • Thread Direction: RIGHT-HAND ALL ENDS
  • Thread Series Designator: UNF ALL ENDS
  • Thread Class: 2B ALL ENDS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Aluminum Alloy Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-087-2894, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-087-2894
Primary Part Number665-11-6D27
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
StatusACTIVE
Disk Loading MethodSPRING
Valve Operation MethodAUTOMATIC
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Connection StyleGASKET SEAL(BOSS) ALL ENDS
Thread DirectionRIGHT-HAND ALL ENDS
Thread Series DesignatorUNF ALL ENDS
Thread Class2B ALL ENDS
Flow Control DeviceDISK
Operating Pressure2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Style DesignatorSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
Nominal Thread Size0.625 INCHES ALL ENDS IN
MaterialALUMINUM ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5841-00-089-1286328-711 INTERCHANGEABLE
Bracket,roll Frame
Cmc Electronics Inc
5905-00-107-0656 INTERCHANGEABLE
Resistor,fixed,composition
2530-00-916-3431328-71-1 INTERCHANGEABLE
Brake Lining Kit
Cmbf, Llc Dba Cmbf Llc
Cross-Reference Index
Part NumberManufacturer
665-11-6D27 PRIMARY Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA)
3-2871-1 PRIMARY Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA)
4820-087-2894 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
3-2878-1 Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA)
4820000872894 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
11676313 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
Related Parts
5841-00-089-1286INTERCHANGEABLE
BRACKET,ROLL FRAME
328-711
5905-00-107-0656INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
2530-00-916-3431INTERCHANGEABLE
BRAKE LINING KIT
328-71-1

Frequently Asked Questions

What is NSN 4820-00-087-2894?

NSN 4820-00-087-2894 is a Valve,safety Relief, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-087-2894?

NSN 4820-00-087-2894 has 6 cross-referenced part numbers: 665-11-6D27 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 3-2871-1 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 4820-087-2894 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 3-2878-1 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), 4820000872894 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales) and 1 more.

What NSN replaces 4820-00-087-2894?

There are 3 known substitutes for 4820-00-087-2894: 5841-00-089-1286, 5905-00-107-0656, 2530-00-916-3431. Verify interchangeability with system specifications before substitution.

What are the specifications of 665-11-6D27?

Key specifications for 665-11-6D27: Disk Loading Method: SPRING; Valve Operation Method: AUTOMATIC; Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE; Connection Style: GASKET SEAL(BOSS) ALL ENDS. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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