PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

81731Spring,helical,extension

Alnitak Corporation · NSN 5360-00-664-2130 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-664-2130 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-664-2130. Primary manufacturer part number: 81731.
Features
  • Spring,helical,extension — FSC 5360
  • Coil Helix Direction: RIGHT-HAND
  • Coil Quantity: 25
  • Style Designator: CYLINDRICAL
  • Design Type: CLOSED
  • Spring Free Outside Diameter: 0.149 INCHES NOMINAL IN
  • End Style: SHORT TWISTED HOOK BOTH ENDS
  • Inside Diameter: 0.125 INCHES NOMINAL IN
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Overall construction
General Description

The Spring,helical,extension, cataloged under National Stock Number 5360-00-664-2130, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Alnitak Corporation. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5360-00-664-2130
Primary Part Number81731
Item NameSpring,helical,extension
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerAlnitak Corporation
StatusCANCELLED
Coil Helix DirectionRIGHT-HAND
Coil Quantity25
Style DesignatorCYLINDRICAL
Design TypeCLOSED
Spring Free Outside Diameter0.149 INCHES NOMINAL IN
End StyleSHORT TWISTED HOOK BOTH ENDS
Inside Diameter0.125 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Spring Free Length0.606 INCHES NOMINAL IN
Hook Radius0.062 INCHES NOMINAL BOTH ENDS IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5915-00-172-51430817310002 INTERCHANGEABLE
Filter,band Pass
Riimic, Llc Dba Sunair Electronics
5120-00-236-3692 INTERCHANGEABLE
Hammer,hand
4820-00-389-458313611 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
3030-00-481-363415610 INTERCHANGEABLE
Belt,v
Dayco Corp Walterboro Plant
3110-00-555-5217 INTERCHANGEABLE
Bearing,ball,annular
5998-00-611-00158173-1 INTERCHANGEABLE
Circuit Card Assembly
Electrac Space Electronics Laboratory Inc Vibration Instruments Co Div
4730-00-740-150713611 INTERCHANGEABLE
Strainer Element,sediment
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5950-00-755-6630SM-D-502429 INTERCHANGEABLE
Transformer Assembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4720-00-760-20648173-1 INTERCHANGEABLE
Hose Assembly,nonmetallic
Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto
6510-00-926-91667362 INTERCHANGEABLE
Bandage,cast,impregnated
Bsn Medical Inc
Cross-Reference Index
Part NumberManufacturer
81731 Zf Industrieantriebe Witten Gmbh (DEU)
81731 PRIMARY Alnitak Corporation (USA)
81731 Telemechanics Inc (USA)
13611 PRIMARY Viz Manufacturing Company (USA)
81731 At and T Corp (USA)
Related Parts
5915-00-172-5143INTERCHANGEABLE
FILTER,BAND PASS
0817310002
5120-00-236-3692INTERCHANGEABLE
HAMMER,HAND
4820-00-389-4583INTERCHANGEABLE
SEAT,VALVE
13611
3030-00-481-3634INTERCHANGEABLE
BELT,V
15610
3110-00-555-5217INTERCHANGEABLE
BEARING,BALL,ANNULAR
5998-00-611-0015INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
8173-1
4730-00-740-1507INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
13611
5950-00-755-6630INTERCHANGEABLE
TRANSFORMER ASSEMBLY
SM-D-502429
4720-00-760-2064INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
8173-1
6510-00-926-9166INTERCHANGEABLE
BANDAGE,CAST,IMPREGNATED
7362
6625-01-093-3410INTERCHANGEABLE
TEST SET,RADIO
MT7411A
4510-01-245-3752INTERCHANGEABLE
STOPPER,WASTE DRAIN
68173-1

Frequently Asked Questions

What is NSN 5360-00-664-2130?

NSN 5360-00-664-2130 is a Spring,helical,extension, manufactured by Alnitak Corporation, classified under FSC 5360 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5360-00-664-2130?

NSN 5360-00-664-2130 has 5 cross-referenced part numbers: 81731 (Zf Industrieantriebe Witten Gmbh), 81731 (Alnitak Corporation), 81731 (Telemechanics Inc), 13611 (Viz Manufacturing Company), 81731 (At and T Corp).

What NSN replaces 5360-00-664-2130?

There are 12 known substitutes for 5360-00-664-2130: 5915-00-172-5143, 5120-00-236-3692, 4820-00-389-4583 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 81731?

Key specifications for 81731: Coil Helix Direction: RIGHT-HAND; Coil Quantity: 25; Style Designator: CYLINDRICAL; Design Type: CLOSED. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5360-00-664-2130 still in active supply?

NSN 5360-00-664-2130 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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