PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20000Punch,starter

Mayhew Steel Products Inc · NSN 5120-01-399-9397 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-399-9397 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-399-9397. Primary manufacturer part number: 20000.
Features
  • Punch,starter — FSC 5120
  • Point Size: 0.094 INCHES IN
  • Nondefinitive Spec/std Data: 2 TYPE AND 8 CLASS
  • Specification/standard Data: 05047-ASME B107.410 CAT 48 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Material: STEEL
  • Shank Shape: HEXAGON
  • Shank Width Across Flats: 0.250 INCHES NOMINAL IN
  • 12 verified cross-references
Applications
  • Applications requiring Steel construction
General Description

The Punch,starter, cataloged under National Stock Number 5120-01-399-9397, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Mayhew Steel Products Inc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-01-399-9397
Primary Part Number20000
Item NamePunch,starter
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerMayhew Steel Products Inc
StatusCANCELLED
Point Size0.094 INCHES IN
Nondefinitive Spec/std Data2 TYPE AND 8 CLASS
Specification/standard Data05047-ASME B107.410 CAT 48 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL
Shank ShapeHEXAGON
Shank Width Across Flats0.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5999-00-051-321410-40450-8S INTERCHANGEABLE
Shielding Gasket,electronic
Amphenol Corp Div Amphenol Aerospace Operations
6620-00-224-1335 INTERCHANGEABLE
Gage Unit,engine
5330-00-290-0237 INTERCHANGEABLE
Packing Assembly
2825-00-379-3570400-08 INTERCHANGEABLE
Wheel,turbine,blade
Siemens Energy, Inc.
3456-00-496-8695 INTERCHANGEABLE
Expander,tube
5360-00-530-840522012A INTERCHANGEABLE
Spring,helical,compression
Brinkley Technology Group Llc Dba Hercules Manufacturing
5935-00-660-4296REB-49090A INTERCHANGEABLE
Connector,plug,electrical
Naval Ship Systems Command
5950-00-832-3255 INTERCHANGEABLE
Coil,electrical
5999-00-957-9674 INTERCHANGEABLE
Shielding Gasket,electronic
2590-01-031-209667A274D277 INTERCHANGEABLE
Accumulator,pneumatic
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Cross-Reference Index
Part NumberManufacturer
20000 Mayhew Steel Products Inc (USA)
J501/4S2 The Stanley Works Dba Stanley Proto (USA)
B107.410 CAT 48 TY2CL8 General Services Administration Federal Supply Service (USA)
50-1/4 The Stanley Works Dba Stanley Proto (USA)
GGG-P-831 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
40008 Baltimore Tool Works Inc (USA)
GGG-P-831 TY8CLCSZ1A General Services Administration Federal Supply Service (USA)
34000 Wilton Corp Wilton Tool Div (USA)
3R120 W.w. Grainger, Inc. Div Government Sales Division (USA)
B107.48 TY2CL8 General Services Administration Federal Supply Service (USA)
B107.48 The American Society of Mechanical Engineers (USA)
B107.410 The American Society of Mechanical Engineers (USA)
Related Parts
5999-00-051-3214INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
10-40450-8S
6620-00-224-1335INTERCHANGEABLE
GAGE UNIT,ENGINE
5330-00-290-0237INTERCHANGEABLE
PACKING ASSEMBLY
2825-00-379-3570INTERCHANGEABLE
WHEEL,TURBINE,BLADE
400-08
3456-00-496-8695INTERCHANGEABLE
EXPANDER,TUBE
5360-00-530-8405INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
22012A
5935-00-660-4296INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
REB-49090A
5950-00-832-3255INTERCHANGEABLE
COIL,ELECTRICAL
5999-00-957-9674INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
2590-01-031-2096INTERCHANGEABLE
ACCUMULATOR,PNEUMATIC
67A274D277
4520-01-089-0878INTERCHANGEABLE
HEAT EXCHANGER,HEATER
5950-01-157-2796INTERCHANGEABLE
COIL,RADIO FREQUENCY
583R296H01

Frequently Asked Questions

What is NSN 5120-01-399-9397?

NSN 5120-01-399-9397 is a Punch,starter, manufactured by Mayhew Steel Products Inc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-01-399-9397?

NSN 5120-01-399-9397 has 12 cross-referenced part numbers: 20000 (Mayhew Steel Products Inc), J501/4S2 (The Stanley Works Dba Stanley Proto), B107.410 CAT 48 TY2CL8 (General Services Administration Federal Supply Service), 50-1/4 (The Stanley Works Dba Stanley Proto), GGG-P-831 (Federal Specifications Promulgated by General Services Administration Washington DC) and 7 more.

What NSN replaces 5120-01-399-9397?

There are 12 known substitutes for 5120-01-399-9397: 5999-00-051-3214, 6620-00-224-1335, 5330-00-290-0237 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20000?

Key specifications for 20000: Point Size: 0.094 INCHES IN; Nondefinitive Spec/std Data: 2 TYPE AND 8 CLASS; Specification/standard Data: 05047-ASME B107.410 CAT 48 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Special Features: BLACK OXIDE FINISH. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-399-9397 still in active supply?

NSN 5120-01-399-9397 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.
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