PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

PK121Retainer,helical Compression Spr

Wisconsin Motors, Llc · NSN 5340-00-577-9051 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-577-9051 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-577-9051. Primary manufacturer part number: PK121.
Features
  • Retainer,helical Compression Spr — FSC 5340
  • 4 verified cross-references
  • Primary manufacturer: Wisconsin Motors, Llc
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-00-577-9051, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Wisconsin Motors, Llc. This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Catalog Facts
Item NameRetainer,helical Compression Spr
FSC / FSG5340 — No Item Name Available (FSG 53)
ManufacturersWisconsin Motors, Llc (CAGE 66289); Asphalt Equipment Co Inc (CAGE 17624); Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (CAGE 92679); Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. (CAGE 96046)
Technical Specifications
ParameterValue
NSN5340-00-577-9051
Primary Part NumberPK121
Item NameRetainer,helical Compression Spr
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerWisconsin Motors, Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 2
5330-00-362-845621270A INTERCHANGEABLE
Packing Assembly
H20 Tank Inc U S Motors Div
6240-00-372-4841 INTERCHANGEABLE
Lamp,incandescent
Cross-Reference Index
Part NumberManufacturer
PK121 PRIMARY Wisconsin Motors, Llc (USA)
3-19PK121-259 Asphalt Equipment Co Inc (USA)
69658C1 Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (USA)
56229 Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. (USA)
Related Parts
5330-00-362-8456INTERCHANGEABLE
PACKING ASSEMBLY
21270A
6240-00-372-4841INTERCHANGEABLE
LAMP,INCANDESCENT

Frequently Asked Questions

What is NSN 5340-00-577-9051?

NSN 5340-00-577-9051 is a Retainer,helical Compression Spr, manufactured by Wisconsin Motors, Llc, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-577-9051?

NSN 5340-00-577-9051 has 4 cross-referenced part numbers: PK121 (Wisconsin Motors, Llc), 3-19PK121-259 (Asphalt Equipment Co Inc), 69658C1 (Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/), 56229 (Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.).

What NSN replaces 5340-00-577-9051?

There are 2 known substitutes for 5340-00-577-9051: 5330-00-362-8456, 6240-00-372-4841. Verify interchangeability with system specifications before substitution.

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