PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

X840BWrench,box

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-00-287-4165 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-287-4165 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-287-4165. Primary manufacturer part number: X840B.
Features
  • Wrench,box — FSC 5120
  • Surface Treatment: OXIDE OVERALL
  • Outside Diameter: 4.188 INCHES MAXIMUM IN
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Wrenching Surface Size: 2.625 INCHES NOMINAL SINGLE END IN
  • Offset Height: 2.250 INCHES MINIMUM IN
  • Material: STEEL OVERALL
  • Head Thickness: 1.562 INCHES MAXIMUM IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,box, cataloged under National Stock Number 5120-00-287-4165, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 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
NSN5120-00-287-4165
Primary Part NumberX840B
Item NameWrench,box
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusACTIVE
Surface TreatmentOXIDE OVERALL
Outside Diameter4.188 INCHES MAXIMUM IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Wrenching Surface Size2.625 INCHES NOMINAL SINGLE END IN
Offset Height2.250 INCHES MINIMUM IN
MaterialSTEEL OVERALL
Head Thickness1.562 INCHES MAXIMUM IN
Style DesignatorDOUBLE OFFSET STUB END
Special MarkingsWRENCH SIZE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5340-00-081-3341284 INTERCHANGEABLE
Bumper
Atlantic India Rubber Co Inc
5910-00-112-7017A43-284 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Entron Industries Limited Partnership Dba Entron Industries Property Div
5365-00-241-9962284 INTERCHANGEABLE
Bushing
Stothert & Pitt
4530-00-270-4500 INTERCHANGEABLE
Nozzle,oil Burner,pressure Atomi
5120-00-293-3509 INTERCHANGEABLE
Punch,center,solid
6210-00-467-3847284DPCLR INTERCHANGEABLE
Lens,light
Perko Inc
6625-00-489-8996284 INTERCHANGEABLE
Generator,pulse
Tektronix, Inc.
4730-00-496-59863513 INTERCHANGEABLE
Adapter,straight,pipe to Hose
Dixon Valve & Coupling Company, Llc Div Dixon Fire
1005-00-798-0958284 INTERCHANGEABLE
Washer Non Metallic
Cyclohm Motor Corp
3220-00-835-1641 INTERCHANGEABLE
Mortiser,hollow Chisel,vertical
Cross-Reference Index
Part NumberManufacturer
X840B Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
GGG-W-636 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
A-A-1340 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
284 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
GGG-W-636 TY18CL2 General Services Administration Federal Supply Service (USA)
Related Parts
5340-00-081-3341INTERCHANGEABLE
BUMPER
284
5910-00-112-7017INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
A43-284
5365-00-241-9962INTERCHANGEABLE
BUSHING
284
4530-00-270-4500INTERCHANGEABLE
NOZZLE,OIL BURNER,PRESSURE ATOMI
5120-00-293-3509INTERCHANGEABLE
PUNCH,CENTER,SOLID
6210-00-467-3847INTERCHANGEABLE
LENS,LIGHT
284DPCLR
6625-00-489-8996INTERCHANGEABLE
GENERATOR,PULSE
284
4730-00-496-5986INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO HOSE
3513
1005-00-798-0958INTERCHANGEABLE
WASHER NON METALLIC
284
3220-00-835-1641INTERCHANGEABLE
MORTISER,HOLLOW CHISEL,VERTICAL
5975-00-908-9475INTERCHANGEABLE
CLAMP BACK,CONDUIT
CLB100M
2805-01-035-8358INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
388P

Frequently Asked Questions

What is NSN 5120-00-287-4165?

NSN 5120-00-287-4165 is a Wrench,box, 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 5120-00-287-4165?

NSN 5120-00-287-4165 has 5 cross-referenced part numbers: X840B (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), GGG-W-636 (Federal Specifications Promulgated by General Services Administration Washington DC), A-A-1340 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), 284 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), GGG-W-636 TY18CL2 (General Services Administration Federal Supply Service).

What NSN replaces 5120-00-287-4165?

There are 12 known substitutes for 5120-00-287-4165: 5340-00-081-3341, 5910-00-112-7017, 5365-00-241-9962 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of X840B?

Key specifications for X840B: Surface Treatment: OXIDE OVERALL; Outside Diameter: 4.188 INCHES MAXIMUM IN; Overall Length: 13.562 INCHES MINIMUM IN; Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL. 10 total characteristics are documented in the Federal Logistics Information System.

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