PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FM16Socket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-661-6777 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-661-6777 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-661-6777. Primary manufacturer part number: FM16.
Features
  • Socket,socket Wrench — FSC 5120
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Features Provided: MANUAL TOOL
  • Material: STEEL OVERALL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Style Designator: INTERNAL-INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-661-6777, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-661-6777
Primary Part NumberFM16
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
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Features ProvidedMANUAL TOOL
MaterialSTEEL OVERALL
Drive End ShapeSQUARE SINGLE END INTERNAL
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Style DesignatorINTERNAL-INTERNAL
Wrenching Surface Size16.0 MILLIMETERS NOMINAL SINGLE END MM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3110-00-554-3369 INTERCHANGEABLE
Bearing,ball,annular
6740-00-608-8191 INTERCHANGEABLE
Splicer and Rewinder,photographi
6625-00-669-07394959 INTERCHANGEABLE
Meter,electrical Frequency
Avo Intl
6740-00-868-8080FM16 INTERCHANGEABLE
Splicer and Rewinder,photographi
Joint Photographic Type Designation System
6230-01-554-0854FM16 INTERCHANGEABLE
Filter,flashlight
Surefire, Llc Dba Surefire Llc
Cross-Reference Index
Part NumberManufacturer
11A7000762-9 Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army (USA)
FM16 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
3110-00-554-3369INTERCHANGEABLE
BEARING,BALL,ANNULAR
6740-00-608-8191INTERCHANGEABLE
SPLICER AND REWINDER,PHOTOGRAPHI
6625-00-669-0739INTERCHANGEABLE
METER,ELECTRICAL FREQUENCY
4959
6740-00-868-8080INTERCHANGEABLE
SPLICER AND REWINDER,PHOTOGRAPHI
FM16
6230-01-554-0854INTERCHANGEABLE
FILTER,FLASHLIGHT
FM16

Frequently Asked Questions

What is NSN 5120-01-661-6777?

NSN 5120-01-661-6777 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 5120-01-661-6777?

NSN 5120-01-661-6777 has 2 cross-referenced part numbers: 11A7000762-9 (Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army), FM16 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc).

What NSN replaces 5120-01-661-6777?

There are 5 known substitutes for 5120-01-661-6777: 3110-00-554-3369, 6740-00-608-8191, 6625-00-669-0739 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FM16?

Key specifications for FM16: Overall Length: 27.8 MILLIMETERS NOMINAL MM; End Item Identification: ARSS; Surface Treatment: CHROMIUM OVERALL; 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.
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