PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B138Valve,safety Relief

Harvey Sid Inc · NSN 4820-01-267-8600 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-267-8600 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-267-8600. Primary manufacturer part number: B138.
Features
  • Valve,safety Relief — FSC 4820
  • Media for Which Designed: WATER, FRESH SINGLE RESPONSE
  • 1 verified cross-reference
  • Primary manufacturer: Harvey Sid Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-267-8600, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Harvey Sid Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN4820-01-267-8600
Primary Part NumberB138
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHarvey Sid Inc
StatusACTIVE
Media for Which DesignedWATER, FRESH SINGLE RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-227-2716B138 INTERCHANGEABLE
Bearing,roller,needle
Timken Aerospace, Inc Dba Torrington Product
4920-00-949-8907B138 INTERCHANGEABLE
Coil Assy,degausing
Lockheed Martin Corp
4320-01-328-02132150800 INTERCHANGEABLE
Guide,plunger
W S Darley & Co
Cross-Reference Index
Part NumberManufacturer
B138 Harvey Sid Inc (USA)
Related Parts
3110-00-227-2716INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
B138
4920-00-949-8907INTERCHANGEABLE
COIL ASSY,DEGAUSING
B138
4320-01-328-0213INTERCHANGEABLE
GUIDE,PLUNGER
2150800

Frequently Asked Questions

What is NSN 4820-01-267-8600?

NSN 4820-01-267-8600 is a Valve,safety Relief, manufactured by Harvey Sid Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-267-8600?

NSN 4820-01-267-8600 has 1 cross-referenced part number: B138 (Harvey Sid Inc).

What NSN replaces 4820-01-267-8600?

There are 3 known substitutes for 4820-01-267-8600: 3110-00-227-2716, 4920-00-949-8907, 4320-01-328-0213. Verify interchangeability with system specifications before substitution.

What are the specifications of B138?

Key specifications for B138: Media for Which Designed: WATER, FRESH SINGLE RESPONSE. 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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