PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S321Socket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-039-8106 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-039-8106 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-039-8106. Primary manufacturer part number: S321.
Features
  • Socket,socket Wrench — FSC 5120
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • Criticality Code Justification: ZZZY
  • 1 verified cross-reference
  • Primary manufacturer: Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-039-8106, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-039-8106
Primary Part NumberS321
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6810-00-034-67080CEN155 INTERCHANGEABLE
Sodium Hypophosphit
Occidental Chemical Corp. Dba Oxychem
4730-00-278-457568-4-4 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Brass Craft Mfg Co Sub of Masco Corp
5330-00-374-285325271-192 INTERCHANGEABLE
Seal,mechanical,rotary Shaft
The Gorman-Rupp Company Div Gorman-Rupp
5360-00-527-2436S321 INTERCHANGEABLE
Spring,helical,compression
Merck and Co Inc
5935-00-581-6694954716 INTERCHANGEABLE
Connector,plug,electrical
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5120-01-674-0812FRS S321 INTERCHANGEABLE
Socket,socket Wrench
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Cross-Reference Index
Part NumberManufacturer
S321 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
6810-00-034-6708INTERCHANGEABLE
SODIUM HYPOPHOSPHIT
0CEN155
4730-00-278-4575INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
68-4-4
5330-00-374-2853INTERCHANGEABLE
SEAL,MECHANICAL,ROTARY SHAFT
25271-192
5360-00-527-2436INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
S321
5935-00-581-6694INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
954716
5120-01-674-0812INTERCHANGEABLE
SOCKET,SOCKET WRENCH
FRS S321

Frequently Asked Questions

What is NSN 5120-01-039-8106?

NSN 5120-01-039-8106 is a Socket,socket Wrench, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-039-8106?

NSN 5120-01-039-8106 has 1 cross-referenced part number: S321 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc).

What NSN replaces 5120-01-039-8106?

There are 6 known substitutes for 5120-01-039-8106: 6810-00-034-6708, 4730-00-278-4575, 5330-00-374-2853 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of S321?

Key specifications for S321: Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; 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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