PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SM18Socket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-661-8445 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-661-8445 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-661-8445. Primary manufacturer part number: SM18.
Features
  • Socket,socket Wrench — FSC 5120
  • Style Designator: INTERNAL-INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Material: STEEL OVERALL
  • Features Provided: MANUAL TOOL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Wrenching Surface Size: 18.0 MILLIMETERS NOMINAL SINGLE END MM
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-661-8445, 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 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-661-8445
Primary Part NumberSM18
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusACTIVE
Style DesignatorINTERNAL-INTERNAL
Surface TreatmentCHROMIUM OVERALL
MaterialSTEEL OVERALL
Features ProvidedMANUAL TOOL
Drive End ShapeSQUARE SINGLE END INTERNAL
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Wrenching Surface Size18.0 MILLIMETERS NOMINAL SINGLE END MM
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6105-00-052-35301134617-2 INTERCHANGEABLE
Motor,control
Belfort Instrument Company
4730-00-166-9282SM18 INTERCHANGEABLE
Strainer,suction
B & B Tritech Inc.
3455-00-231-352809600 INTERCHANGEABLE
Cutter,milling,shell End
Niagara Cutter Inc
5930-00-249-4566HD22X2014 INTERCHANGEABLE
Switch,thermostatic
Therm-O-Disc Incorporated
6645-00-268-4042 INTERCHANGEABLE
Clock,alarm
4910-01-532-4200SM18 INTERCHANGEABLE
Lift,motor Vehicle
Vehicle Service Group, Llc Div Rotary Lift
6660-01-716-0924SM-18 INTERCHANGEABLE
Wind Measuring Set
Campbell Scientific Inc
Cross-Reference Index
Part NumberManufacturer
11A7000790-9 Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army (USA)
SM18 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
6105-00-052-3530INTERCHANGEABLE
MOTOR,CONTROL
1134617-2
4730-00-166-9282INTERCHANGEABLE
STRAINER,SUCTION
SM18
3455-00-231-3528INTERCHANGEABLE
CUTTER,MILLING,SHELL END
09600
5930-00-249-4566INTERCHANGEABLE
SWITCH,THERMOSTATIC
HD22X2014
6645-00-268-4042INTERCHANGEABLE
CLOCK,ALARM
4910-01-532-4200INTERCHANGEABLE
LIFT,MOTOR VEHICLE
SM18
6660-01-716-0924INTERCHANGEABLE
WIND MEASURING SET
SM-18

Frequently Asked Questions

What is NSN 5120-01-661-8445?

NSN 5120-01-661-8445 is a Socket,socket Wrench, 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 5120-01-661-8445?

NSN 5120-01-661-8445 has 2 cross-referenced part numbers: 11A7000790-9 (Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army), SM18 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc).

What NSN replaces 5120-01-661-8445?

There are 7 known substitutes for 5120-01-661-8445: 6105-00-052-3530, 4730-00-166-9282, 3455-00-231-3528 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SM18?

Key specifications for SM18: Overall Length: 82.6 MILLIMETERS NOMINAL MM; End Item Identification: ARSS; Style Designator: INTERNAL-INTERNAL; Surface Treatment: CHROMIUM OVERALL. 10 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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