PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4342-6Tool,tang Breakoff

Stanley Engineered Fastening Llc · NSN 5120-01-157-6468 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-157-6468 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-157-6468. Primary manufacturer part number: 4342-6.
Features
  • Tool,tang Breakoff — FSC 5120
  • General Characteristics Item Description: LOW CARBON STEEL; 4.000 IN. LG.; 0.250 IN. DIA.; CASE HARDENED TO ROCKWELL 45 MIN. TO 0.005-0.020 IN. DEEP; THREADED TO M6 X 1,THREAD LG. = 1.000 IN. LG. IN
  • 1 verified cross-reference
  • Primary manufacturer: Stanley Engineered Fastening Llc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Tool,tang Breakoff, cataloged under National Stock Number 5120-01-157-6468, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Stanley Engineered Fastening Llc. Government technical data includes 1 verified specification, 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-157-6468
Primary Part Number4342-6
Item NameTool,tang Breakoff
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerStanley Engineered Fastening Llc
StatusACTIVE
General Characteristics Item DescriptionLOW CARBON STEEL; 4.000 IN. LG.; 0.250 IN. DIA.; CASE HARDENED TO ROCKWELL 45 MIN. TO 0.005-0.020 IN. DEEP; THREADED TO M6 X 1,THREAD LG. = 1.000 IN. LG. IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3040-01-459-6836MMS0021-106-300 INTERCHANGEABLE
Collar,shaft
The Carlyle Johnson Machine Co, Llc Dba Carlyle Johnson Machine Co Llc
5310-01-641-816643426-2 INTERCHANGEABLE
Washer,flat
United States Department of the Navy Dba Naval Surface Warfare Center Panama City
Cross-Reference Index
Part NumberManufacturer
4342-6 PRIMARY Stanley Engineered Fastening Llc (USA)
Related Parts
3040-01-459-6836INTERCHANGEABLE
COLLAR,SHAFT
MMS0021-106-300
5310-01-641-8166INTERCHANGEABLE
WASHER,FLAT
43426-2

Frequently Asked Questions

What is NSN 5120-01-157-6468?

NSN 5120-01-157-6468 is a Tool,tang Breakoff, manufactured by Stanley Engineered Fastening Llc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-157-6468?

NSN 5120-01-157-6468 has 1 cross-referenced part number: 4342-6 (Stanley Engineered Fastening Llc).

What NSN replaces 5120-01-157-6468?

There are 2 known substitutes for 5120-01-157-6468: 3040-01-459-6836, 5310-01-641-8166. Verify interchangeability with system specifications before substitution.

What are the specifications of 4342-6?

Key specifications for 4342-6: End Item Identification: GUN,AUTOMATIC,25 MM.(M242); NSN 1005-01-086-1400 MM; General Characteristics Item Description: LOW CARBON STEEL; 4.000 IN. LG.; 0.250 IN. DIA.; CASE HARDENED TO ROCKWELL 45 MIN. TO 0.005-0.020 IN. DEEP; THREADED TO M6 X 1,THREAD LG. = 1.000 IN. LG. IN. 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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