PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

PB3 1-2Lock Spring,turnlock Fastener

Southco Manufacturing Ltd · NSN 5325-00-780-3430 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-780-3430 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-780-3430. Primary manufacturer part number: PB3 1-2.
Features
  • Lock Spring,turnlock Fastener — FSC 5325
  • 25 verified cross-references
  • Primary manufacturer: Southco Manufacturing Ltd
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
General Description

The Lock Spring,turnlock Fastener, cataloged under National Stock Number 5325-00-780-3430, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Southco Manufacturing Ltd. This item has 25 commercial cross-references from 19 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameLock Spring,turnlock Fastener
FSC / FSG5325 — No Item Name Available (FSG 53)
ManufacturersSouthco Manufacturing Ltd (CAGE U1584); Southco Inc (CAGE 72794); Lectro Products Inc (CAGE 27947); Dzus Fastener Gmbh (CAGE C0111); L3harris Technologies, Inc. (CAGE 28527)
Technical Specifications
ParameterValue
NSN5325-00-780-3430
Primary Part NumberPB3 1-2
Item NameLock Spring,turnlock Fastener
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerSouthco Manufacturing Ltd
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
3110-00-100-0748151R4 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Harbormaster Marine, Inc
4130-00-135-64502794 INTERCHANGEABLE
Stem Assembly
Elkay Mfg Co Water Cooler Div
5330-00-136-74012794 INTERCHANGEABLE
Gasket
Thermo Power Corp Engine Div
2915-00-147-60913016T84P01 INTERCHANGEABLE
Nozzle,fuel Injection
General Electric Company Dba Ge Aerospace
5950-00-681-6289436235 INTERCHANGEABLE
Transformer,power
Lockheed Martin Corporation Div Rms - Mitchel Field
5330-00-786-51070087007 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5325-01-057-2870 INTERCHANGEABLE
Insert,screw Thread
5360-01-233-8595 INTERCHANGEABLE
Spring
5340-01-343-6562718917-1 INTERCHANGEABLE
Bracket,mounting
Raytheon Company Dba Raytheon
6625-01-374-41162794 INTERCHANGEABLE
Analyzer,spectrum
Tektronix, Inc.
Cross-Reference Index
Part NumberManufacturer
PB3 1-2 PRIMARY Southco Manufacturing Ltd (GBR)
128-0101-005 Southco Inc (USA)
2794 Lectro Products Inc (USA)
PB31-2SS Southco Inc (USA)
PB3 1/2 Dzus Fastener Gmbh (DEU)
2137167G001 PRIMARY L3harris Technologies, Inc. (USA)
50-034-1 Bell Textron Inc (USA)
6011296 PRIMARY International Business Machines Corp Parts Order Center Dept E - 54 (USA)
PB35 Southco Manufacturing Ltd (GBR)
639541-007 PRIMARY Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA)
075-001559 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA)
6011296 International Business Machines Corporation Dba IBM (USA)
PB3 1-2 Southco Inc (USA)
1018838-002 Anacomp, Inc. (USA)
6011296 International Business Machines Corp (USA)
PB31/2 Ramstad Inc (USA)
718917-1 Raytheon Company Div Rmd Strategic (USA)
VFN164 42.1-1 Airbus Deutschland Gmbh -Werk Bremen- (DEU)
128-0101-005 The Boeing Company Div Legacy Boeing Hb1 (USA)
107262-1 Raytheon Company (USA)
Related Parts
3110-00-100-0748INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
151R4
4130-00-135-6450INTERCHANGEABLE
STEM ASSEMBLY
2794
5330-00-136-7401INTERCHANGEABLE
GASKET
2794
2915-00-147-6091INTERCHANGEABLE
NOZZLE,FUEL INJECTION
3016T84P01
5950-00-681-6289INTERCHANGEABLE
TRANSFORMER,POWER
436235
5330-00-786-5107INTERCHANGEABLE
GASKET
0087007
5325-01-057-2870INTERCHANGEABLE
INSERT,SCREW THREAD
5360-01-233-8595INTERCHANGEABLE
SPRING
5340-01-343-6562INTERCHANGEABLE
BRACKET,MOUNTING
718917-1
6625-01-374-4116INTERCHANGEABLE
ANALYZER,SPECTRUM
2794
4940-01-478-1465INTERCHANGEABLE
SHOP EQUIPMENT,UTILITY
2794

Frequently Asked Questions

What is NSN 5325-00-780-3430?

NSN 5325-00-780-3430 is a Lock Spring,turnlock Fastener, manufactured by Southco Manufacturing Ltd, classified under FSC 5325 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5325-00-780-3430?

NSN 5325-00-780-3430 has 25 cross-referenced part numbers: PB3 1-2 (Southco Manufacturing Ltd), 128-0101-005 (Southco Inc), 2794 (Lectro Products Inc), PB31-2SS (Southco Inc), PB3 1/2 (Dzus Fastener Gmbh) and 20 more.

What NSN replaces 5325-00-780-3430?

There are 11 known substitutes for 5325-00-780-3430: 3110-00-100-0748, 4130-00-135-6450, 5330-00-136-7401 and 8 more. Verify interchangeability with system specifications before substitution.

Is NSN 5325-00-780-3430 still in active supply?

NSN 5325-00-780-3430 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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