PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4785Handle,socket Wrench

The Stanley Works Dba Stanley Proto · NSN 5120-01-399-9521 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-399-9521 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-399-9521. Primary manufacturer part number: 4785.
Features
  • Handle,socket Wrench — FSC 5120
  • Drive End Shape: SQUARE SINGLE END EXTERNAL
  • Specification/standard Data: 05047-ASME B107.10M PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nondefinitive Spec/std Data: 1 TYPE AND 4 CLASS
  • Style Designator: SLIDING T
  • Drive Surface Size: 0.250 INCHES NOMINAL SINGLE END IN
  • Material: STEEL OVERALL
  • Surface Treatment: CHROMIUM OVERALL
Applications
  • Applications requiring Steel Overall construction
General Description

The Handle,socket Wrench, cataloged under National Stock Number 5120-01-399-9521, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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
NSN5120-01-399-9521
Primary Part Number4785
Item NameHandle,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
Drive End ShapeSQUARE SINGLE END EXTERNAL
Specification/standard Data05047-ASME B107.10M PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nondefinitive Spec/std Data1 TYPE AND 4 CLASS
Style DesignatorSLIDING T
Drive Surface Size0.250 INCHES NOMINAL SINGLE END IN
MaterialSTEEL OVERALL
Surface TreatmentCHROMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5935-00-229-73771453 INTERCHANGEABLE
Connector,plug,electrical
Parker Hannifin Corporation Div Cylinder Division
6685-00-557-0625 INTERCHANGEABLE
Gage,pressure,dial Indicating
6220-00-845-109190302 INTERCHANGEABLE
Lens,light
Grote Industries Inc Dba Grote Manufacturing Co Div Military Products
4320-00-907-095079889/02-218-001 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Defense Maritime Solutions, Inc.
5905-01-223-4019 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
3010-01-498-96384785 INTERCHANGEABLE
Clutch Drum Hfe
Amw Cuyuna Engine Co. Inc Dba Two Stroke International
6515-01-574-326125608-994 INTERCHANGEABLE
Blade,surgical Knife,detachable
Vwr International, Llc Dba Vwr Scientific
Cross-Reference Index
Part NumberManufacturer
4785 PRIMARY The Stanley Works Dba Stanley Proto (USA)
B107.10M The American Society of Mechanical Engineers (USA)
B107.10M TY1CL4 General Services Administration Federal Supply Service (USA)
1AF44 W.w. Grainger, Inc. Div Government Sales Division (USA)
Related Parts
5935-00-229-7377INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
1453
6685-00-557-0625INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6220-00-845-1091INTERCHANGEABLE
LENS,LIGHT
90302
4320-00-907-0950INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
79889/02-218-001
5905-01-223-4019INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
3010-01-498-9638INTERCHANGEABLE
CLUTCH DRUM HFE
4785
6515-01-574-3261INTERCHANGEABLE
BLADE,SURGICAL KNIFE,DETACHABLE
25608-994

Frequently Asked Questions

What is NSN 5120-01-399-9521?

NSN 5120-01-399-9521 is a Handle,socket Wrench, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-399-9521?

NSN 5120-01-399-9521 has 4 cross-referenced part numbers: 4785 (The Stanley Works Dba Stanley Proto), B107.10M (The American Society of Mechanical Engineers), B107.10M TY1CL4 (General Services Administration Federal Supply Service), 1AF44 (W.w. Grainger, Inc. Div Government Sales Division).

What NSN replaces 5120-01-399-9521?

There are 7 known substitutes for 5120-01-399-9521: 5935-00-229-7377, 6685-00-557-0625, 6220-00-845-1091 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4785?

Key specifications for 4785: Drive End Shape: SQUARE SINGLE END EXTERNAL; Specification/standard Data: 05047-ASME B107.10M PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Nondefinitive Spec/std Data: 1 TYPE AND 4 CLASS; Style Designator: SLIDING T. 8 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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