PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S-643Spring,helical,extension

Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp. · NSN 5360-01-481-9878 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-01-481-9878 — this item is cataloged by the U.S. Government under National Stock Number 5360-01-481-9878. Primary manufacturer part number: S-643.
Features
  • Spring,helical,extension — FSC 5360
  • Spring Deflection Rate: 1.400 POUNDS PER INCH MAXIMUM LBS
  • Material: STEEL CORROSION RESISTING OVERALL
  • Load Rating: 42.00 POUNDS MAXIMUM LBS
  • 1 verified cross-reference
  • Primary manufacturer: Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Spring,helical,extension, cataloged under National Stock Number 5360-01-481-9878, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-01-481-9878
Primary Part NumberS-643
Item NameSpring,helical,extension
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerMatthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.
StatusACTIVE
Spring Deflection Rate1.400 POUNDS PER INCH MAXIMUM LBS
MaterialSTEEL CORROSION RESISTING OVERALL
Load Rating42.00 POUNDS MAXIMUM LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4310-00-060-4586 INTERCHANGEABLE
Ring,piston
5940-00-115-2676MS20659-143 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
3940-00-235-84534080517 INTERCHANGEABLE
Link,hoisting
Textron Aviation Inc
5305-00-639-8085S643 INTERCHANGEABLE
Screw,cap,socket Head
Bae Systems Land & Armaments L.p.
5365-01-036-7243 INTERCHANGEABLE
Ring,connecting,round
5365-01-056-834111153730 INTERCHANGEABLE
Ring,connecting,round
Us Army Aviation and Missile Command
5365-01-227-9457521-4788614 ITEM 114 INTERCHANGEABLE
Ring,connecting,round
Naval Ship Systems Command
4730-01-251-221913228E2595-67 INTERCHANGEABLE
Plug,pipe
Cecom Lr Center
5325-01-557-9361S643 INTERCHANGEABLE
Ring,retaining
Palfinger Marine Usa, Llc
Cross-Reference Index
Part NumberManufacturer
S-643 PRIMARY Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp. (USA)
Related Parts
4310-00-060-4586INTERCHANGEABLE
RING,PISTON
5940-00-115-2676INTERCHANGEABLE
TERMINAL,LUG
MS20659-143
3940-00-235-8453INTERCHANGEABLE
LINK,HOISTING
4080517
5305-00-639-8085INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
S643
5365-01-036-7243INTERCHANGEABLE
RING,CONNECTING,ROUND
5365-01-056-8341INTERCHANGEABLE
RING,CONNECTING,ROUND
11153730
5365-01-227-9457INTERCHANGEABLE
RING,CONNECTING,ROUND
521-4788614 ITEM 114
4730-01-251-2219INTERCHANGEABLE
PLUG,PIPE
13228E2595-67
5325-01-557-9361INTERCHANGEABLE
RING,RETAINING
S643

Frequently Asked Questions

What is NSN 5360-01-481-9878?

NSN 5360-01-481-9878 is a Spring,helical,extension, manufactured by Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp., classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-01-481-9878?

NSN 5360-01-481-9878 has 1 cross-referenced part number: S-643 (Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.).

What NSN replaces 5360-01-481-9878?

There are 9 known substitutes for 5360-01-481-9878: 4310-00-060-4586, 5940-00-115-2676, 3940-00-235-8453 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of S-643?

Key specifications for S-643: Special Features: INITIAL TENSION 11 LB; WIRE DIA 0.085 IN; RATE 24 LB/IN; LGTH 3.690 IN; O/A DIA 0.625 IN LBS; Spring Deflection Rate: 1.400 POUNDS PER INCH MAXIMUM LBS; Material: STEEL CORROSION RESISTING OVERALL; Load Rating: 42.00 POUNDS MAXIMUM LBS. 4 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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