PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

901-17Seat,valve

Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok · NSN 4820-00-103-2485 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-103-2485 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-103-2485. Primary manufacturer part number: 901-17.
Features
  • Seat,valve — FSC 4820
  • Criticality Code Justification: ZZZY
  • Material: COPPER ALLOY OVERALL
  • Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330
  • 3 verified cross-references
  • Primary manufacturer: Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-103-2485, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-103-2485
Primary Part Number901-17
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCircor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
StatusACTIVE
Criticality Code JustificationZZZY
MaterialCOPPER ALLOY OVERALL
Reference Number Differentiating CharacteristicsCLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3110-00-100-0315453A INTERCHANGEABLE
Cup,tapered Roller Bearing
Ntn Bearing Corporation of America
6680-00-829-5160901-17 INTERCHANGEABLE
Seat,regulator
Tescom Corp Dba Tescom Div Tescom
5930-01-286-995490117 INTERCHANGEABLE
Switch,proximity
Jergens Inc Div Tooling Components Division
4130-01-424-197490117 INTERCHANGEABLE
Extruding Head Assembly
Wilshire Corp
6525-01-470-603090117 INTERCHANGEABLE
Tank,developer X-Ra
Air Techniques, Inc.
Cross-Reference Index
Part NumberManufacturer
901-17 Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA)
901-17CP Naval Inventory Control Point Mechanicsburg (USA)
901-17 Tescom Corp Dba Tescom Div Tescom (USA)
Related Parts
3110-00-100-0315INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
453A
6680-00-829-5160INTERCHANGEABLE
SEAT,REGULATOR
901-17
5930-01-286-9954INTERCHANGEABLE
SWITCH,PROXIMITY
90117
4130-01-424-1974INTERCHANGEABLE
EXTRUDING HEAD ASSEMBLY
90117
6525-01-470-6030INTERCHANGEABLE
TANK,DEVELOPER X-RA
90117

Frequently Asked Questions

What is NSN 4820-00-103-2485?

NSN 4820-00-103-2485 is a Seat,valve, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-103-2485?

NSN 4820-00-103-2485 has 3 cross-referenced part numbers: 901-17 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 901-17CP (Naval Inventory Control Point Mechanicsburg), 901-17 (Tescom Corp Dba Tescom Div Tescom).

What NSN replaces 4820-00-103-2485?

There are 5 known substitutes for 4820-00-103-2485: 3110-00-100-0315, 6680-00-829-5160, 5930-01-286-9954 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 901-17?

Key specifications for 901-17: Criticality Code Justification: ZZZY; Material: COPPER ALLOY OVERALL; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330. 3 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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