PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

J88603Key,socket Head Screw

The Stanley Works Dba Stanley Proto · NSN 5120-01-428-8400 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-428-8400 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-428-8400. Primary manufacturer part number: J88603.
Features
  • Key,socket Head Screw — FSC 5120
  • Material: STEEL WRENCHING SURFACE
  • Style Designator: SCREWDRIVER HANDLE
  • Wrenching Surface Size: 0.078 INCHES NOMINAL SINGLE END IN
  • Material: PLASTIC HANDLE
  • Wrenching Surface Shape: HEXAGON SINGLE END EXTERNAL
  • 5 verified cross-references
  • Primary manufacturer: The Stanley Works Dba Stanley Proto
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Wrenching Surface construction
General Description

The Key,socket Head Screw, cataloged under National Stock Number 5120-01-428-8400, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-428-8400
Primary Part NumberJ88603
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
MaterialSTEEL WRENCHING SURFACE
Style DesignatorSCREWDRIVER HANDLE
Wrenching Surface Size0.078 INCHES NOMINAL SINGLE END IN
MaterialPLASTIC HANDLE
Wrenching Surface ShapeHEXAGON SINGLE END EXTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5935-00-140-317510-200620-27P INTERCHANGEABLE
Insert,electrical Connector
Amphenol Corp Div Amphenol Aerospace Operations
3110-00-156-350088603ND INTERCHANGEABLE
Bearing,ball,annular
Naval Ship Systems Command
5950-00-995-02291023805 INTERCHANGEABLE
Transformer,power
Lockheed Martin Corporation Div Rms - Mitchel Field
6230-01-697-052588603 INTERCHANGEABLE
Flashlight
Streamlight Inc Dba Streamlight Inc
Cross-Reference Index
Part NumberManufacturer
5HM60 W.w. Grainger, Inc. Div Government Sales Division (USA)
9582 The Stanley Works Dba Stanley Proto (USA)
J88603 PRIMARY The Stanley Works Dba Stanley Proto (USA)
SDA5B Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
88603 The Stanley Works Dba Stanley Proto (USA)
Related Parts
5935-00-140-3175INTERCHANGEABLE
INSERT,ELECTRICAL CONNECTOR
10-200620-27P
3110-00-156-3500INTERCHANGEABLE
BEARING,BALL,ANNULAR
88603ND
5950-00-995-0229INTERCHANGEABLE
TRANSFORMER,POWER
1023805
6230-01-697-0525INTERCHANGEABLE
FLASHLIGHT
88603

Frequently Asked Questions

What is NSN 5120-01-428-8400?

NSN 5120-01-428-8400 is a Key,socket Head Screw, 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 5120-01-428-8400?

NSN 5120-01-428-8400 has 5 cross-referenced part numbers: 5HM60 (W.w. Grainger, Inc. Div Government Sales Division), 9582 (The Stanley Works Dba Stanley Proto), J88603 (The Stanley Works Dba Stanley Proto), SDA5B (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), 88603 (The Stanley Works Dba Stanley Proto).

What NSN replaces 5120-01-428-8400?

There are 4 known substitutes for 5120-01-428-8400: 5935-00-140-3175, 3110-00-156-3500, 5950-00-995-0229 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of J88603?

Key specifications for J88603: Overall Length: 6.234 INCHES NOMINAL IN; Material: STEEL WRENCHING SURFACE; Style Designator: SCREWDRIVER HANDLE; Wrenching Surface Size: 0.078 INCHES NOMINAL SINGLE END IN. 6 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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