PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25966O-Ring

Tulsa Winch, Inc. · NSN 5331-01-691-1568 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-691-1568 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-691-1568. Primary manufacturer part number: 25966.
Features
  • O-Ring — FSC 5331
  • 1 verified cross-reference
  • Primary manufacturer: Tulsa Winch, Inc.
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-691-1568, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Tulsa Winch, Inc.. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-691-1568
Primary Part Number25966
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerTulsa Winch, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5950-00-988-79740082E-3711-6 INTERCHANGEABLE
Transformer,radio Frequency
L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications
4940-01-117-906611426 INTERCHANGEABLE
Drawer,unit
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
4820-01-243-9839 INTERCHANGEABLE
Valve,linear,directional Control
1560-01-716-27472-5966-5 INTERCHANGEABLE
Web,structural Component,aircraf
The Boeing Company Div Defense
1560-01-722-78782-5966-6 INTERCHANGEABLE
Web,structural Component,aircraf
The Boeing Company Div Defense
Cross-Reference Index
Part NumberManufacturer
25966 PRIMARY Tulsa Winch, Inc. (USA)
Related Parts
5950-00-988-7974INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
0082E-3711-6
4940-01-117-9066INTERCHANGEABLE
DRAWER,UNIT
11426
4820-01-243-9839INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
1560-01-716-2747INTERCHANGEABLE
WEB,STRUCTURAL COMPONENT,AIRCRAF
2-5966-5
1560-01-722-7878INTERCHANGEABLE
WEB,STRUCTURAL COMPONENT,AIRCRAF
2-5966-6

Frequently Asked Questions

What is NSN 5331-01-691-1568?

NSN 5331-01-691-1568 is a O-Ring, manufactured by Tulsa Winch, Inc., classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-691-1568?

NSN 5331-01-691-1568 has 1 cross-referenced part number: 25966 (Tulsa Winch, Inc.).

What NSN replaces 5331-01-691-1568?

There are 5 known substitutes for 5331-01-691-1568: 5950-00-988-7974, 4940-01-117-9066, 4820-01-243-9839 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25966?

Key specifications for 25966: End Item Identification: WINCH,HYDRAULICS; Special Features: INSIDE DIAMETER 7.250 NOMINAL INCHES;CROSS SECTION 0.09375 NOMINAL INCHES;; Part Name Assigned by Controlling Agency: O-RING. 3 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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