PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

281-1-1Parts Kit,safety Relief Valve

Atlas Valve Co · NSN 4820-01-307-6148 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-307-6148 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-307-6148. Primary manufacturer part number: 281-1-1.
Features
  • Parts Kit,safety Relief Valve — FSC 4820
  • Supply Items and Quantities: SPRING 2; SEAT 2
  • Component Quantity: 4
  • 2 verified cross-references
  • Primary manufacturer: Atlas Valve Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-01-307-6148, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Atlas Valve Co. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN4820-01-307-6148
Primary Part Number281-1-1
Item NameParts Kit,safety Relief Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAtlas Valve Co
StatusACTIVE
Supply Items and QuantitiesSPRING 2; SEAT 2
Component Quantity4
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6240-00-262-28941001374 INTERCHANGEABLE
Lamp,incandescent
Burton Medical Products Corporation
3010-00-528-9944015-0257-000 INTERCHANGEABLE
Coupling,shaft,rigid
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5930-00-584-400928111 INTERCHANGEABLE
Switch,code Indicating Wheel
Janco Corporation Dba Janco Corp Div Mason Controls
6680-00-777-6635SR4G-540 INTERCHANGEABLE
Regulator
Victor Equipment Co
5930-01-260-77917909131-00 INTERCHANGEABLE
Switch,push
Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
5910-01-397-05920281110000 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
Riimic, Llc Dba Sunair Electronics
4820-01-479-067028.111 INTERCHANGEABLE
Valve,stop-Check
Lutz-Jesco America Corp
Cross-Reference Index
Part NumberManufacturer
281-1-1 Atlas Valve Co (USA)
K281-1-1 Atlas Valve Co (USA)
Related Parts
6240-00-262-2894INTERCHANGEABLE
LAMP,INCANDESCENT
1001374
3010-00-528-9944INTERCHANGEABLE
COUPLING,SHAFT,RIGID
015-0257-000
5930-00-584-4009INTERCHANGEABLE
SWITCH,CODE INDICATING WHEEL
28111
6680-00-777-6635INTERCHANGEABLE
REGULATOR
SR4G-540
5930-01-260-7791INTERCHANGEABLE
SWITCH,PUSH
7909131-00
5910-01-397-0592INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
0281110000
4820-01-479-0670INTERCHANGEABLE
VALVE,STOP-CHECK
28.111

Frequently Asked Questions

What is NSN 4820-01-307-6148?

NSN 4820-01-307-6148 is a Parts Kit,safety Relief Valve, manufactured by Atlas Valve Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-307-6148?

NSN 4820-01-307-6148 has 2 cross-referenced part numbers: 281-1-1 (Atlas Valve Co), K281-1-1 (Atlas Valve Co).

What NSN replaces 4820-01-307-6148?

There are 7 known substitutes for 4820-01-307-6148: 6240-00-262-2894, 3010-00-528-9944, 5930-00-584-4009 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 281-1-1?

Key specifications for 281-1-1: Supply Items and Quantities: SPRING 2; SEAT 2; Component Quantity: 4. 2 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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