PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18870Valve,safety Relief

Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems · NSN 4820-01-517-5527 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-517-5527 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-517-5527. Primary manufacturer part number: 18870.
Features
  • Valve,safety Relief — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-517-5527, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-517-5527
Primary Part Number18870
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerGse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4820-00-032-924718870 INTERCHANGEABLE
Valve,regulating,temperature
Honeywell International Inc. Div Aerospace - Torrance
5998-00-113-9989 INTERCHANGEABLE
Circuit Card Assembly
5330-00-213-164079455 INTERCHANGEABLE
Gasket Set
Leroi International Inc Dba Compair Leroi
5340-00-359-0859 INTERCHANGEABLE
Clip,spring Tension
4820-00-585-75713564-2000 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division
3120-01-084-148518870 INTERCHANGEABLE
Bearing,washer,thrust
Altra Industrial Motion Corp.
4820-01-144-8244650900 INTERCHANGEABLE
Cartridge,valve
Time Manufacturing Company Dba Time Manufacturing Company
Cross-Reference Index
Part NumberManufacturer
18870 Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems (USA)
18870 Itw Gse Inc. (USA)
Related Parts
4820-00-032-9247INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
18870
5998-00-113-9989INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5330-00-213-1640INTERCHANGEABLE
GASKET SET
79455
5340-00-359-0859INTERCHANGEABLE
CLIP,SPRING TENSION
4820-00-585-7571INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
3564-2000
3120-01-084-1485INTERCHANGEABLE
BEARING,WASHER,THRUST
18870
4820-01-144-8244INTERCHANGEABLE
CARTRIDGE,VALVE
650900

Frequently Asked Questions

What is NSN 4820-01-517-5527?

NSN 4820-01-517-5527 is a Valve,safety Relief, manufactured by Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-517-5527?

NSN 4820-01-517-5527 has 2 cross-referenced part numbers: 18870 (Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems), 18870 (Itw Gse Inc.).

What NSN replaces 4820-01-517-5527?

There are 7 known substitutes for 4820-01-517-5527: 4820-00-032-9247, 5998-00-113-9989, 5330-00-213-1640 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18870?

Key specifications for 18870: End Item Identification: F-22 RAPTOR. 1 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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