PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

129Block,bench,mechanic's

L.s. Starrett Company (the) Div Tool Division · NSN 5120-00-240-7308 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-240-7308 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-240-7308. Primary manufacturer part number: 129.
Features
  • Block,bench,mechanic's — FSC 5120
  • General Characteristics Item Description: STEEL; 3 IN. DIA X 1-1/2 IN. H; V-GROOVE ACROSS FACE; OVERSIZE HOLES FROM 1/8 TO 5/8 IN. DIA; FOR HOLDING WORK WHEN DRIVING PINS, DRILLING, ETC. IN
  • 6 verified cross-references
  • Primary manufacturer: L.s. Starrett Company (the) Div Tool Division
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Block,bench,mechanic's, cataloged under National Stock Number 5120-00-240-7308, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is L.s. Starrett Company (the) Div Tool Division. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-240-7308
Primary Part Number129
Item NameBlock,bench,mechanic's
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerL.s. Starrett Company (the) Div Tool Division
StatusCANCELLED
General Characteristics Item DescriptionSTEEL; 3 IN. DIA X 1-1/2 IN. H; V-GROOVE ACROSS FACE; OVERSIZE HOLES FROM 1/8 TO 5/8 IN. DIA; FOR HOLDING WORK WHEN DRIVING PINS, DRILLING, ETC. IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
5330-00-214-644650559 INTERCHANGEABLE
Gasket
Hamilton Sundstrand Corporation Dba Collins Aerospace
5310-00-221-4915SCB70002 INTERCHANGEABLE
Nut,plain,hexagon
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3455-00-222-4063 INTERCHANGEABLE
File,rotary
5355-00-687-293150559 INTERCHANGEABLE
Dial,control
Paramount Panels, Inc. Div California Plasteck
3010-00-919-5233 INTERCHANGEABLE
Coupling,shaft,flexible
5998-01-060-639350559 INTERCHANGEABLE
Circuit Card Assembly
Alliant Techsystems Operations Llc Div Defense Electronic Systems
5999-01-089-1799 INTERCHANGEABLE
Delay Line
3460-01-138-3486 INTERCHANGEABLE
Deflector
5950-01-139-6040374264 INTERCHANGEABLE
Transformer,power
Fluke Corp
5305-01-240-0857 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
129 PRIMARY L.s. Starrett Company (the) Div Tool Division (USA)
ELF 240 Elf Machine Works, Inc Dba Elf Industries, Llc Div Elf Industries, Llc (USA)
50559 L.s. Starrett Company (the) Div Tool Division (USA)
GGG-B-00400 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
HMC-308 PRIMARY Wilson Corporation, Inc. Dba Hollingsworth Mfg. Co. Div Hollingsworth Mfg. (USA)
10-087B K and D Mfg Corp (USA)
Related Parts
5330-00-214-6446INTERCHANGEABLE
GASKET
50559
5310-00-221-4915INTERCHANGEABLE
NUT,PLAIN,HEXAGON
SCB70002
3455-00-222-4063INTERCHANGEABLE
FILE,ROTARY
5355-00-687-2931INTERCHANGEABLE
DIAL,CONTROL
50559
3010-00-919-5233INTERCHANGEABLE
COUPLING,SHAFT,FLEXIBLE
5998-01-060-6393INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
50559
5999-01-089-1799INTERCHANGEABLE
DELAY LINE
3460-01-138-3486INTERCHANGEABLE
DEFLECTOR
5950-01-139-6040INTERCHANGEABLE
TRANSFORMER,POWER
374264
5305-01-240-0857INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
4720-01-337-3953INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
50559-25

Frequently Asked Questions

What is NSN 5120-00-240-7308?

NSN 5120-00-240-7308 is a Block,bench,mechanic's, manufactured by L.s. Starrett Company (the) Div Tool Division, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-240-7308?

NSN 5120-00-240-7308 has 6 cross-referenced part numbers: 129 (L.s. Starrett Company (the) Div Tool Division), ELF 240 (Elf Machine Works, Inc Dba Elf Industries, Llc Div Elf Industries, Llc), 50559 (L.s. Starrett Company (the) Div Tool Division), GGG-B-00400 (Federal Specifications Promulgated by General Services Administration Washington DC), HMC-308 (Wilson Corporation, Inc. Dba Hollingsworth Mfg. Co. Div Hollingsworth Mfg.) and 1 more.

What NSN replaces 5120-00-240-7308?

There are 11 known substitutes for 5120-00-240-7308: 5330-00-214-6446, 5310-00-221-4915, 3455-00-222-4063 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 129?

Key specifications for 129: General Characteristics Item Description: STEEL; 3 IN. DIA X 1-1/2 IN. H; V-GROOVE ACROSS FACE; OVERSIZE HOLES FROM 1/8 TO 5/8 IN. DIA; FOR HOLDING WORK WHEN DRIVING PINS, DRILLING, ETC. IN. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-240-7308 still in active supply?

NSN 5120-00-240-7308 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com