PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

321-8556655ITEM31Seal,antipilferage

Naval Sea Systems Command · NSN 5340-01-718-3491 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-718-3491 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-718-3491. Primary manufacturer part number: 321-8556655ITEM31.
Features
  • Seal,antipilferage — FSC 5340
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVSUP-WSS ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
  • Criticality Code Justification: ZZZY
  • 2 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Seal,antipilferage, cataloged under National Stock Number 5340-01-718-3491, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: RO.

Technical Specifications
ParameterValue
NSN5340-01-718-3491
Primary Part Number321-8556655ITEM31
Item NameSeal,antipilferage
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVSUP-WSS ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueRO
Verified Substitutes 11
Electrode,grounding,electrosurgi
6695-00-009-5920 INTERCHANGEABLE
Sampler,liquid
5815-00-129-19457380 INTERCHANGEABLE
Assembly Switch
Telemechanics Inc
6240-00-261-84307380 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
3120-00-339-3641HM3950-339-3641 INTERCHANGEABLE
Bearing,sleeve
Naval Inventory Control Point Mechanicsburg
6625-00-832-9051 INTERCHANGEABLE
Test Set,electrical Power
3030-01-084-239815380 INTERCHANGEABLE
Belt,v
Carlisle Power Transmission Products Inc
4820-01-248-89427380 INTERCHANGEABLE
Cap,valve
Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect
5995-01-353-5724807250-1 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Hamilton Sundstrand Corporation Dba Collins Aerospace
1650-01-354-29027380 INTERCHANGEABLE
Accumulator,hydraulic
Pneudraulics, Inc.
Cross-Reference Index
Part NumberManufacturer
321-8556655ITEM31 Naval Sea Systems Command (USA)
7380 3m Company (USA)
Related Parts
6515-01-387-6106SUCCESSOR
ELECTRODE,GROUNDING,ELECTROSURGI
6695-00-009-5920INTERCHANGEABLE
SAMPLER,LIQUID
5815-00-129-1945INTERCHANGEABLE
ASSEMBLY SWITCH
7380
6240-00-261-8430INTERCHANGEABLE
LAMP,INCANDESCENT
7380
3120-00-339-3641INTERCHANGEABLE
BEARING,SLEEVE
HM3950-339-3641
6625-00-832-9051INTERCHANGEABLE
TEST SET,ELECTRICAL POWER
3030-01-084-2398INTERCHANGEABLE
BELT,V
15380
4820-01-248-8942INTERCHANGEABLE
CAP,VALVE
7380
5995-01-353-5724INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
807250-1
1650-01-354-2902INTERCHANGEABLE
ACCUMULATOR,HYDRAULIC
7380
8040-01-561-3011INTERCHANGEABLE
ACTIVATOR,ADHESIVE
135303

Frequently Asked Questions

What is NSN 5340-01-718-3491?

NSN 5340-01-718-3491 is a Seal,antipilferage, manufactured by Naval Sea Systems Command, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-718-3491?

NSN 5340-01-718-3491 has 2 cross-referenced part numbers: 321-8556655ITEM31 (Naval Sea Systems Command), 7380 (3m Company).

What NSN replaces 5340-01-718-3491?

There are 11 known substitutes for 5340-01-718-3491: 6515-01-387-6106, 6695-00-009-5920, 5815-00-129-1945 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 321-8556655ITEM31?

Key specifications for 321-8556655ITEM31: Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVSUP-WSS ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS; Criticality Code Justification: ZZZY. 2 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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