PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9503Spring,helical,compression

Mkt Geotechnical Systems · NSN 5360-00-291-5443 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-291-5443 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-291-5443. Primary manufacturer part number: 9503.
Features
  • Spring,helical,compression — FSC 5360
  • Inside Diameter: 0.7712 INCHES NOMINAL IN
  • Spring Deflection Rate: 20.910 POUNDS PER INCH NOMINAL LBS
  • Spring Free Length: 2.250 INCHES NOMINAL IN
  • Spring Free Outside Diameter: 1.000 INCHES NOMINAL IN
  • End Style: SPRING END,SQUARED AND GROUND BOTH ENDS
  • Spring Solid Length: 1.125 INCHES NOMINAL IN
  • Coil Helix Direction: RIGHT-HAND
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Copper Alloy 511 Overall construction
General Description

The Spring,helical,compression, cataloged under National Stock Number 5360-00-291-5443, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mkt Geotechnical Systems. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 3 manufacturers, 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
NSN5360-00-291-5443
Primary Part Number9503
Item NameSpring,helical,compression
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerMkt Geotechnical Systems
StatusACTIVE
Inside Diameter0.7712 INCHES NOMINAL IN
Spring Deflection Rate20.910 POUNDS PER INCH NOMINAL LBS
Spring Free Length2.250 INCHES NOMINAL IN
Spring Free Outside Diameter1.000 INCHES NOMINAL IN
End StyleSPRING END,SQUARED AND GROUND BOTH ENDS
Spring Solid Length1.125 INCHES NOMINAL IN
Coil Helix DirectionRIGHT-HAND
MaterialCOPPER ALLOY 511 OVERALL
Coil Quantity10
Style DesignatorCYLINDRICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-23631203L-1B1 INTERCHANGEABLE
Bearing,ball,annular
Schatz Bearing Corporation Dba Schatz Bearing Corp
7920-00-223-80059503 INTERCHANGEABLE
Brush,acid Swabbing
Jason Incorporated Dba Osborn International a Unit of Jason
4820-00-277-1713 INTERCHANGEABLE
Valve,angle
5950-01-131-99759100-3560 INTERCHANGEABLE
Coil,radio Frequency
Keysight Technologies Inc
5360-01-150-9193 INTERCHANGEABLE
Spring,switch
5820-01-165-4421MX-10282/SRC INTERCHANGEABLE
Distribution Unit,hydraulic
Joint Electronics Type Designation System
6145-01-191-73572460AT3M INTERCHANGEABLE
Cable,special Purpose,electrical
Tappan Wire and Cable Inc
9340-01-226-2660 INTERCHANGEABLE
Window,observation
5998-01-367-8876901-01 ITEM 3 INTERCHANGEABLE
Backplane Assembly
Hose-Mccann Telephone Co, Inc
2530-01-458-1267HR832 INTERCHANGEABLE
Hub,wheel,vehicular
Kelsey-Hayes Co Gunite Div
Cross-Reference Index
Part NumberManufacturer
9503 Mkt Geotechnical Systems (USA)
MB2652-4PC25 Mkt Geotechnical Systems (USA)
MB2158PC25 Mkt Geotechnical Systems (USA)
MB1157-37 Mkt Geotechnical Systems (USA)
MB1157-5PC37 Mkt Geotechnical Systems (USA)
MB2326-1PC25 Mkt Geotechnical Systems (USA)
MC1346S22-0-21ERPC25 Maritime Administration (USA)
MB2326PC25 Mkt Geotechnical Systems (USA)
MB2158-1PC25 Mkt Geotechnical Systems (USA)
MB2652PC25 Mkt Geotechnical Systems (USA)
MB-1157-P37 Zf Industrieantriebe Witten Gmbh (DEU)
6474 Mkt Geotechnical Systems (USA)
MB1157-4PC37 Mkt Geotechnical Systems (USA)
MB2667-2PC25 Mkt Geotechnical Systems (USA)
MB2137PC25 Mkt Geotechnical Systems (USA)
Related Parts
3110-00-100-2363INTERCHANGEABLE
BEARING,BALL,ANNULAR
1203L-1B1
7920-00-223-8005INTERCHANGEABLE
BRUSH,ACID SWABBING
9503
4820-00-277-1713INTERCHANGEABLE
VALVE,ANGLE
5950-01-131-9975INTERCHANGEABLE
COIL,RADIO FREQUENCY
9100-3560
5360-01-150-9193INTERCHANGEABLE
SPRING,SWITCH
5820-01-165-4421INTERCHANGEABLE
DISTRIBUTION UNIT,HYDRAULIC
MX-10282/SRC
6145-01-191-7357INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
2460AT3M
9340-01-226-2660INTERCHANGEABLE
WINDOW,OBSERVATION
5998-01-367-8876INTERCHANGEABLE
BACKPLANE ASSEMBLY
901-01 ITEM 3
2530-01-458-1267INTERCHANGEABLE
HUB,WHEEL,VEHICULAR
HR832
2530-01-458-1273INTERCHANGEABLE
HUB,WHEEL,VEHICULAR
HR821K1
5310-01-471-5320INTERCHANGEABLE
WASHER,CONCAVE

Frequently Asked Questions

What is NSN 5360-00-291-5443?

NSN 5360-00-291-5443 is a Spring,helical,compression, manufactured by Mkt Geotechnical Systems, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-291-5443?

NSN 5360-00-291-5443 has 15 cross-referenced part numbers: 9503 (Mkt Geotechnical Systems), MB2652-4PC25 (Mkt Geotechnical Systems), MB2158PC25 (Mkt Geotechnical Systems), MB1157-37 (Mkt Geotechnical Systems), MB1157-5PC37 (Mkt Geotechnical Systems) and 10 more.

What NSN replaces 5360-00-291-5443?

There are 12 known substitutes for 5360-00-291-5443: 3110-00-100-2363, 7920-00-223-8005, 4820-00-277-1713 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9503?

Key specifications for 9503: Inside Diameter: 0.7712 INCHES NOMINAL IN; Spring Deflection Rate: 20.910 POUNDS PER INCH NOMINAL LBS; Spring Free Length: 2.250 INCHES NOMINAL IN; Spring Free Outside Diameter: 1.000 INCHES NOMINAL IN. 10 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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