PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

921-01Seat,helical Compression Spring

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 5340-01-379-0533 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-379-0533 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-379-0533. Primary manufacturer part number: 921-01.
Features
  • Seat,helical Compression Spring — FSC 5340
  • 6 verified cross-references
  • Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
General Description

The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-379-0533, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Catalog Facts
Item NameSeat,helical Compression Spring
FSC / FSG5340 — No Item Name Available (FSG 53)
ManufacturersTrac Regulator Co., Inc. Dba Trac Regulator Co Inc (CAGE 55378); Zf Industrieantriebe Witten Gmbh (CAGE D9182)
Technical Specifications
ParameterValue
NSN5340-01-379-0533
Primary Part Number921-01
Item NameSeat,helical Compression Spring
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 10
2530-00-103-824492101 INTERCHANGEABLE
Cap,grease
Hayes Axle Co
5905-00-106-9344 INTERCHANGEABLE
Resistor,fixed,composition
2815-00-511-2586BM35791 INTERCHANGEABLE
Guide,valve
Cummins Inc.
5340-00-598-738592101 INTERCHANGEABLE
Plug,protective,dust and Moistur
Honeywell International Inc. Div Aerospace - Torrance
4920-01-300-193792101 INTERCHANGEABLE
Test Program Set
Textron Systems Corporation Dba Textron Systems Corp
6810-01-352-0868921-01 INTERCHANGEABLE
Mercuric Nitrate Solution
Hach Company Dba Hach Co
5805-01-366-2041921-01 INTERCHANGEABLE
Call-Signal Station
Hose-Mccann Telephone Co, Inc
3110-01-463-6482921-01 INTERCHANGEABLE
Bearing,matched Set
Rtx Corporation Div Pratt & Whitney
5340-01-542-071692-101 INTERCHANGEABLE
Panel,blank
Thermo King Corp
4820-01-543-063440441-901 5-60PSI INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
40441-9 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
921-01 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
921-01 Zf Industrieantriebe Witten Gmbh (DEU)
40506-9 ITEM 3 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40441-9 FIND NO 3 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40506-4 FIND NO 3 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
2530-00-103-8244INTERCHANGEABLE
CAP,GREASE
92101
5905-00-106-9344INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
2815-00-511-2586INTERCHANGEABLE
GUIDE,VALVE
BM35791
5340-00-598-7385INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR
92101
4920-01-300-1937INTERCHANGEABLE
TEST PROGRAM SET
92101
6810-01-352-0868INTERCHANGEABLE
MERCURIC NITRATE SOLUTION
921-01
5805-01-366-2041INTERCHANGEABLE
CALL-SIGNAL STATION
921-01
3110-01-463-6482INTERCHANGEABLE
BEARING,MATCHED SET
921-01
5340-01-542-0716INTERCHANGEABLE
PANEL,BLANK
92-101
4820-01-543-0634INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40441-901 5-60PSI

Frequently Asked Questions

What is NSN 5340-01-379-0533?

NSN 5340-01-379-0533 is a Seat,helical Compression Spring, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-379-0533?

NSN 5340-01-379-0533 has 6 cross-referenced part numbers: 40441-9 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 921-01 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 921-01 (Zf Industrieantriebe Witten Gmbh), 40506-9 ITEM 3 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40441-9 FIND NO 3 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc) and 1 more.

What NSN replaces 5340-01-379-0533?

There are 10 known substitutes for 5340-01-379-0533: 2530-00-103-8244, 5905-00-106-9344, 2815-00-511-2586 and 7 more. Verify interchangeability with system specifications before substitution.

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