PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3661Ring,retaining

New Haven Mfg Corp · NSN 5325-00-976-1111 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-976-1111 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-976-1111. Primary manufacturer part number: 3661.
Features
  • Ring,retaining — FSC 5325
  • Material: COPPER ALLOY
  • Major Thickness: 0.025 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: ROUNDED CORNERS
  • Inside Diameter: 0.450 INCHES NOMINAL IN
  • Usage Design: EXTERNAL
  • Ring Style: C
  • Casehardening Indicator: NOT CASEHARDENED
Applications
  • Applications requiring Copper Alloy construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-976-1111, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is New Haven Mfg Corp. Government technical data includes 7 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5325-00-976-1111
Primary Part Number3661
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerNew Haven Mfg Corp
StatusACTIVE
MaterialCOPPER ALLOY
Major Thickness0.025 INCHES NOMINAL IN
Cross-Sectional Shape StyleROUNDED CORNERS
Inside Diameter0.450 INCHES NOMINAL IN
Usage DesignEXTERNAL
Ring StyleC
Casehardening IndicatorNOT CASEHARDENED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5355-00-160-71051755762 INTERCHANGEABLE
Knob
Naval Ship Systems Command
5355-00-341-24772Z5824-253 INTERCHANGEABLE
Knob
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5950-00-366-00414030831-0701 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon Co
5950-00-833-31922104626 INTERCHANGEABLE
Reactor
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6640-00-903-4079BR661 INTERCHANGEABLE
Brush,scale Pan,laboratory
Fisher Scientific Company L.l.c.
5950-01-011-32026140050-6 INTERCHANGEABLE
Coil,radio Frequency
Viking Technologies, Ltd.
4510-01-096-5205 INTERCHANGEABLE
Holder,toilet Tissue
5935-01-096-7841366-1 INTERCHANGEABLE
Cover,electrical Connector
Microwave Devices Inc
6635-01-147-5496 INTERCHANGEABLE
Torque Watch Calibrator
5120-01-162-0328 INTERCHANGEABLE
Blade,nutdriver
Cross-Reference Index
Part NumberManufacturer
3661 New Haven Mfg Corp (USA)
03661 New Haven Mfg Corp (USA)
Related Parts
5355-00-160-7105INTERCHANGEABLE
KNOB
1755762
5355-00-341-2477INTERCHANGEABLE
KNOB
2Z5824-253
5950-00-366-0041INTERCHANGEABLE
TRANSFORMER,POWER
4030831-0701
5950-00-833-3192INTERCHANGEABLE
REACTOR
2104626
6640-00-903-4079INTERCHANGEABLE
BRUSH,SCALE PAN,LABORATORY
BR661
5950-01-011-3202INTERCHANGEABLE
COIL,RADIO FREQUENCY
6140050-6
4510-01-096-5205INTERCHANGEABLE
HOLDER,TOILET TISSUE
5935-01-096-7841INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
366-1
6635-01-147-5496INTERCHANGEABLE
TORQUE WATCH CALIBRATOR
5120-01-162-0328INTERCHANGEABLE
BLADE,NUTDRIVER
4820-01-367-2048INTERCHANGEABLE
POSITIONER,VALVE
3661
4920-01-539-3813INTERCHANGEABLE
CUT OFF SWITCH,AIRC
3661

Frequently Asked Questions

What is NSN 5325-00-976-1111?

NSN 5325-00-976-1111 is a Ring,retaining, manufactured by New Haven Mfg Corp, classified under FSC 5325 (No Item Name Available). Status: active.

What are the part numbers for NSN 5325-00-976-1111?

NSN 5325-00-976-1111 has 2 cross-referenced part numbers: 3661 (New Haven Mfg Corp), 03661 (New Haven Mfg Corp).

What NSN replaces 5325-00-976-1111?

There are 12 known substitutes for 5325-00-976-1111: 5355-00-160-7105, 5355-00-341-2477, 5950-00-366-0041 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3661?

Key specifications for 3661: Material: COPPER ALLOY; Major Thickness: 0.025 INCHES NOMINAL IN; Cross-Sectional Shape Style: ROUNDED CORNERS; Inside Diameter: 0.450 INCHES NOMINAL IN. 7 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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