PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

300-502Battery,ram Back Up

Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering · NSN 4920-01-571-8221 · FSC 4920 · No Item Name Available
Verified by PartsTable
NSN 4920-01-571-8221 — this item is cataloged by the U.S. Government under National Stock Number 4920-01-571-8221. Primary manufacturer part number: 300-502.
Features
  • Battery,ram Back Up — FSC 4920
  • 2 verified cross-references
  • Primary manufacturer: Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Battery,ram Back Up, cataloged under National Stock Number 4920-01-571-8221, is classified within Federal Supply Class 4920 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBattery,ram Back Up
FSC / FSG4920 — No Item Name Available (FSG 49)
ManufacturersRisk Industries Llc Dba Pines Technology Div Headquarters (CAGE 4RPC2); Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering (CAGE 74QK6)
Technical Specifications
ParameterValue
NSN4920-01-571-8221
Primary Part Number300-502
Item NameBattery,ram Back Up
FSC / FSG4920 / 49 — No Item Name Available
ManufacturerAjax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5905-00-042-5099225027-27 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Raytheon Company
5340-00-563-8770300502 INTERCHANGEABLE
Bracket,mounting
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
6210-00-892-253030050-2 INTERCHANGEABLE
Lens,light
Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch
5330-00-994-1605300502 INTERCHANGEABLE
Packing Ring
Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
4610-01-289-36393005-02 INTERCHANGEABLE
Cabinet Assembly,brominator
Pentair Filtration Solutions, Llc
5930-01-303-0565 INTERCHANGEABLE
Switch,rotary
Cross-Reference Index
Part NumberManufacturer
300-502 Risk Industries Llc Dba Pines Technology Div Headquarters (USA)
300-502 PRIMARY Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering (USA)
Related Parts
5905-00-042-5099INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
225027-27
5340-00-563-8770INTERCHANGEABLE
BRACKET,MOUNTING
300502
6210-00-892-2530INTERCHANGEABLE
LENS,LIGHT
30050-2
5330-00-994-1605INTERCHANGEABLE
PACKING RING
300502
4610-01-289-3639INTERCHANGEABLE
CABINET ASSEMBLY,BROMINATOR
3005-02
5930-01-303-0565INTERCHANGEABLE
SWITCH,ROTARY

Frequently Asked Questions

What is NSN 4920-01-571-8221?

NSN 4920-01-571-8221 is a Battery,ram Back Up, manufactured by Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering, classified under FSC 4920 (No Item Name Available). Status: active.

What are the part numbers for NSN 4920-01-571-8221?

NSN 4920-01-571-8221 has 2 cross-referenced part numbers: 300-502 (Risk Industries Llc Dba Pines Technology Div Headquarters), 300-502 (Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering).

What NSN replaces 4920-01-571-8221?

There are 6 known substitutes for 4920-01-571-8221: 5905-00-042-5099, 5340-00-563-8770, 6210-00-892-2530 and 3 more. Verify interchangeability with system specifications before substitution.

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