PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

261-063O-Ring

Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering · NSN 5331-01-263-6330 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-263-6330 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-263-6330. Primary manufacturer part number: 261-063.
Features
  • O-Ring — FSC 5331
  • 4 verified cross-references
  • Primary manufacturer: Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-263-6330, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering. This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersAjax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering (CAGE 74QK6); Pines Manufacturing Inc. Dba Pines Technology Div Pines Manufacturing Inc (CAGE 028Q7); Risk Industries Llc Dba Pines Technology Div Headquarters (CAGE 4RPC2); Teledyne Pines Teledyne Inc Company (CAGE 47315)
Technical Specifications
ParameterValue
NSN5331-01-263-6330
Primary Part Number261-063
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerAjax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5935-00-340-6905 INTERCHANGEABLE
Cover,electrical Connector
5905-01-105-1616 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Cross-Reference Index
Part NumberManufacturer
261-063 PRIMARY Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering (USA)
261-063 Pines Manufacturing Inc. Dba Pines Technology Div Pines Manufacturing Inc (USA)
261-063 Risk Industries Llc Dba Pines Technology Div Headquarters (USA)
261-063 Teledyne Pines Teledyne Inc Company (USA)
Related Parts
5935-00-340-6905INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
5905-01-105-1616INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,

Frequently Asked Questions

What is NSN 5331-01-263-6330?

NSN 5331-01-263-6330 is a O-Ring, manufactured by Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-263-6330?

NSN 5331-01-263-6330 has 4 cross-referenced part numbers: 261-063 (Ajax Tocco Magnethermic Corporation Dba Pines Engineering Div Pines Engineering), 261-063 (Pines Manufacturing Inc. Dba Pines Technology Div Pines Manufacturing Inc), 261-063 (Risk Industries Llc Dba Pines Technology Div Headquarters), 261-063 (Teledyne Pines Teledyne Inc Company).

What NSN replaces 5331-01-263-6330?

There are 2 known substitutes for 5331-01-263-6330: 5935-00-340-6905, 5905-01-105-1616. Verify interchangeability with system specifications before substitution.

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