PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40203Wrench,box and Open End,combinat

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-503-1258 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-503-1258 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-503-1258. Primary manufacturer part number: 40203.
Features
  • Wrench,box and Open End,combinat — FSC 5120
  • Wrenching End Offset Angle: 15.0 DEGREES NOMINAL
  • Wrenching Surface Shape: 12 POINT SECOND END INTERNAL
  • Head Angle: 15.0 DEGREES NOMINAL
  • Material: STEEL OVERALL
  • Wrenching Surface Size: 8.0 MILLIMETERS NOMINAL BOTH ENDS MM
  • Style Designator: OFFSET
  • Wrenching Surface Shape: OVAL FIRST END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,box and Open End,combinat, cataloged under National Stock Number 5120-01-503-1258, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Apex Tool Group, Llc Dba Nicholson. Government technical data includes 8 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-503-1258
Primary Part Number40203
Item NameWrench,box and Open End,combinat
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
Wrenching End Offset Angle15.0 DEGREES NOMINAL
Wrenching Surface Shape12 POINT SECOND END INTERNAL
Head Angle15.0 DEGREES NOMINAL
MaterialSTEEL OVERALL
Wrenching Surface Size8.0 MILLIMETERS NOMINAL BOTH ENDS MM
Style DesignatorOFFSET
Wrenching Surface ShapeOVAL FIRST END INTERNAL
Surface TreatmentCHROMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5136-00-189-3195 INTERCHANGEABLE
Die,thread Cutting
3020-00-231-873440203 INTERCHANGEABLE
Link,roller Chain
Allianz Sweeper Company
5330-00-434-63874020-3 INTERCHANGEABLE
Ring,wiper
Columbus Jack Corporation Div Columbus Jack
6210-00-458-0055402-03 INTERCHANGEABLE
Filter,indicator Light
Switchcraft Inc.
5330-00-618-244140203 INTERCHANGEABLE
Gasket
John Deer Consumer Products Inc
6240-01-233-838240203 INTERCHANGEABLE
Lamp,incandescent
Truck-Lite Co., Llc
5330-01-306-505740203 INTERCHANGEABLE
Seal,nonmetallic Round Section
Bell Intl Inc
5995-01-341-37534-020-3 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Advanced Circuit Systems Inc
6530-01-388-0214402-3 INTERCHANGEABLE
Litter Pad,sea-Air Rescue,medica
Lifesaving Systems Llc
6350-01-528-900940203 INTERCHANGEABLE
Alarm,smoke,automatic
Consilium Marine Us Inc Dba Consilium Marine Us Inc
Cross-Reference Index
Part NumberManufacturer
40203 Apex Tool Group, Llc Dba Nicholson (USA)
40203 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
Related Parts
5136-00-189-3195INTERCHANGEABLE
DIE,THREAD CUTTING
3020-00-231-8734INTERCHANGEABLE
LINK,ROLLER CHAIN
40203
5330-00-434-6387INTERCHANGEABLE
RING,WIPER
4020-3
6210-00-458-0055INTERCHANGEABLE
FILTER,INDICATOR LIGHT
402-03
5330-00-618-2441INTERCHANGEABLE
GASKET
40203
6240-01-233-8382INTERCHANGEABLE
LAMP,INCANDESCENT
40203
5330-01-306-5057INTERCHANGEABLE
SEAL,NONMETALLIC ROUND SECTION
40203
5995-01-341-3753INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
4-020-3
6530-01-388-0214INTERCHANGEABLE
LITTER PAD,SEA-AIR RESCUE,MEDICA
402-3
6350-01-528-9009INTERCHANGEABLE
ALARM,SMOKE,AUTOMATIC
40203
8415-01-541-9430INTERCHANGEABLE
JACKET,COMBAT
40203
2990-01-560-5987INTERCHANGEABLE
CONNECTOR,EXHAUST PIPE
402-10

Frequently Asked Questions

What is NSN 5120-01-503-1258?

NSN 5120-01-503-1258 is a Wrench,box and Open End,combinat, manufactured by Apex Tool Group, Llc Dba Nicholson, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-503-1258?

NSN 5120-01-503-1258 has 2 cross-referenced part numbers: 40203 (Apex Tool Group, Llc Dba Nicholson), 40203 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.).

What NSN replaces 5120-01-503-1258?

There are 12 known substitutes for 5120-01-503-1258: 5136-00-189-3195, 3020-00-231-8734, 5330-00-434-6387 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40203?

Key specifications for 40203: Wrenching End Offset Angle: 15.0 DEGREES NOMINAL; Wrenching Surface Shape: 12 POINT SECOND END INTERNAL; Head Angle: 15.0 DEGREES NOMINAL; Material: STEEL OVERALL. 9 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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