PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42520Screwdriver Attachment,socket Wr

S K Hand Tool Corp · NSN 5120-01-431-2660 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-431-2660 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-431-2660. Primary manufacturer part number: 42520.
Features
  • Screwdriver Attachment,socket Wr — FSC 5120
  • Style Designator: TORX
  • Material: STEEL OVERALL
  • Surface Treatment: CHROMIUM DRIVE SURFACE
  • Drive Surface Size: 0.250 INCHES NOMINAL SINGLE END IN
  • Surface Treatment: OXIDE BIT
  • Features Provided: MANUAL TOOL AND REPLACEABLE BIT
  • Tip Size Designation: T20
Applications
  • Applications requiring Steel Overall construction
General Description

The Screwdriver Attachment,socket Wr, cataloged under National Stock Number 5120-01-431-2660, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is S K Hand Tool Corp. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5120-01-431-2660
Primary Part Number42520
Item NameScrewdriver Attachment,socket Wr
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerS K Hand Tool Corp
StatusACTIVE
Style DesignatorTORX
MaterialSTEEL OVERALL
Surface TreatmentCHROMIUM DRIVE SURFACE
Drive Surface Size0.250 INCHES NOMINAL SINGLE END IN
Surface TreatmentOXIDE BIT
Features ProvidedMANUAL TOOL AND REPLACEABLE BIT
Tip Size DesignationT20
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5950-00-101-24113018736"REV.B" INTERCHANGEABLE
Transformer,power
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6615-00-903-441442520 INTERCHANGEABLE
Gyroscope,displacement
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
2940-01-148-2873 INTERCHANGEABLE
Filter Element,intake Air Cleane
7510-01-264-457642520 INTERCHANGEABLE
Binder,loose-Leaf
Acco Intl Inc
5845-01-318-654442520 INTERCHANGEABLE
Hydrophone,sonar
L3 Technologies, Inc. Div L3harris Edo Western Corporation
5995-01-510-464942520 INTERCHANGEABLE
Cable Assembly,power,electrical
Science Applications International Corporation Dba Saic
2920-01-583-795442520 INTERCHANGEABLE
Coil,ignition
Westerbeke Corporation
Cross-Reference Index
Part NumberManufacturer
42520 PRIMARY S K Hand Tool Corp (USA)
Related Parts
5950-00-101-2411INTERCHANGEABLE
TRANSFORMER,POWER
3018736"REV.B"
6615-00-903-4414INTERCHANGEABLE
GYROSCOPE,DISPLACEMENT
42520
2940-01-148-2873INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
7510-01-264-4576INTERCHANGEABLE
BINDER,LOOSE-LEAF
42520
5845-01-318-6544INTERCHANGEABLE
HYDROPHONE,SONAR
42520
5995-01-510-4649INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
42520
2920-01-583-7954INTERCHANGEABLE
COIL,IGNITION
42520

Frequently Asked Questions

What is NSN 5120-01-431-2660?

NSN 5120-01-431-2660 is a Screwdriver Attachment,socket Wr, manufactured by S K Hand Tool Corp, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-431-2660?

NSN 5120-01-431-2660 has 1 cross-referenced part number: 42520 (S K Hand Tool Corp).

What NSN replaces 5120-01-431-2660?

There are 7 known substitutes for 5120-01-431-2660: 5950-00-101-2411, 6615-00-903-4414, 2940-01-148-2873 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 42520?

Key specifications for 42520: Special Features: TAMPER-RESISTANT; Style Designator: TORX; Material: STEEL OVERALL; Surface Treatment: CHROMIUM DRIVE SURFACE. 9 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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