PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

961JWrench,socket

Martin Sprocket and Gear Inc · NSN 5120-00-224-2577 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-224-2577 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-224-2577. Primary manufacturer part number: 961J.
Features
  • Wrench,socket — FSC 5120
  • Features Provided: REMOVABLE HANDLE
  • Surface Treatment: CHROMIUM AND NICKEL AND OXIDE OVERALL
  • Material: STEEL OVERALL
  • Wrenching Surface Shape: SQUARE SINGLE END INTERNAL
  • Wrenching Surface Size: 0.250 INCHES NOMINAL SINGLE END IN
  • Style Designator: SINGLE SOCKET T
  • 26 verified cross-references
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,socket, cataloged under National Stock Number 5120-00-224-2577, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Martin Sprocket and Gear Inc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 26 commercial cross-references from 10 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-224-2577
Primary Part Number961J
Item NameWrench,socket
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerMartin Sprocket and Gear Inc
StatusCANCELLED
Features ProvidedREMOVABLE HANDLE
Surface TreatmentCHROMIUM AND NICKEL AND OXIDE OVERALL
MaterialSTEEL OVERALL
Wrenching Surface ShapeSQUARE SINGLE END INTERNAL
Wrenching Surface Size0.250 INCHES NOMINAL SINGLE END IN
Style DesignatorSINGLE SOCKET T
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5940-00-143-4775MS25036-156 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
5310-00-223-3254307554 INTERCHANGEABLE
Washer,flat
Brp Us Inc
5940-00-892-285235108 INTERCHANGEABLE
Splice,conductor
Abb Installation Products Inc
6240-00-939-7859120MB INTERCHANGEABLE
Lamp,incandescent
Gte Products Corp Lighting Products Group Hillsboro Miniature Lamp Plant
5310-01-012-741135108 INTERCHANGEABLE
Washer,flat
Williams International Co., L.l.c.
5440-01-143-595335108 INTERCHANGEABLE
Stepladder
Bauer Corp
2530-01-286-195735108 INTERCHANGEABLE
Boot,vehicular Components
Jay-Em Aerospace Corporation
4820-01-333-008635108 INTERCHANGEABLE
Valve,check
Mti Insulated Products Inc.
5940-01-486-542335108 INTERCHANGEABLE
Terminal,lug
Te Connectivity Corporation
6105-01-518-4807 INTERCHANGEABLE
Stator,motor
Cross-Reference Index
Part NumberManufacturer
82514S4105-574681PC5 Naval Ship Systems Command (USA)
571-2100-1302931REVAPC13 Naval Ship Systems Command (USA)
578-2100-1574352REVAPC13 Naval Ship Systems Command (USA)
35-108 Armstrong Bros Tool Co (USA)
575-2100-1487344REVAPC13 Naval Ship Systems Command (USA)
82514S4105-574581PC38 Naval Ship Systems Command (USA)
575-2100-1443109REVAPC13 Naval Ship Systems Command (USA)
574-4105-812275REVAPC12 Naval Ship Systems Command (USA)
82514S4105-574911PC5 Naval Ship Systems Command (USA)
35-108 Apex Tool Group, Llc Dba Nicholson (USA)
7879-26REVAPC13 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
YN1S41-68PC43 Naval Ship Systems Command (USA)
571-2100-1302930REVAPC13 Naval Ship Systems Command (USA)
576-2100-1505170REVAPC4 Naval Ship Systems Command (USA)
4279-24REVAPC4 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
961J PRIMARY Martin Sprocket and Gear Inc (USA)
3679-21REVAPC13 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
B4035 Cooper Machinery Services Llc (USA)
35-108 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
4279-24REVAPC4 Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility (USA)
Related Parts
5940-00-143-4775INTERCHANGEABLE
TERMINAL,LUG
MS25036-156
5310-00-223-3254INTERCHANGEABLE
WASHER,FLAT
307554
5940-00-892-2852INTERCHANGEABLE
SPLICE,CONDUCTOR
35108
6240-00-939-7859INTERCHANGEABLE
LAMP,INCANDESCENT
120MB
5310-01-012-7411INTERCHANGEABLE
WASHER,FLAT
35108
5440-01-143-5953INTERCHANGEABLE
STEPLADDER
35108
2530-01-286-1957INTERCHANGEABLE
BOOT,VEHICULAR COMPONENTS
35108
4820-01-333-0086INTERCHANGEABLE
VALVE,CHECK
35108
5940-01-486-5423INTERCHANGEABLE
TERMINAL,LUG
35108
6105-01-518-4807INTERCHANGEABLE
STATOR,MOTOR

Frequently Asked Questions

What is NSN 5120-00-224-2577?

NSN 5120-00-224-2577 is a Wrench,socket, manufactured by Martin Sprocket and Gear Inc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-224-2577?

NSN 5120-00-224-2577 has 26 cross-referenced part numbers: 82514S4105-574681PC5 (Naval Ship Systems Command), 571-2100-1302931REVAPC13 (Naval Ship Systems Command), 578-2100-1574352REVAPC13 (Naval Ship Systems Command), 35-108 (Armstrong Bros Tool Co), 575-2100-1487344REVAPC13 (Naval Ship Systems Command) and 21 more.

What NSN replaces 5120-00-224-2577?

There are 10 known substitutes for 5120-00-224-2577: 5940-00-143-4775, 5310-00-223-3254, 5940-00-892-2852 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 961J?

Key specifications for 961J: Features Provided: REMOVABLE HANDLE; Surface Treatment: CHROMIUM AND NICKEL AND OXIDE OVERALL; Material: STEEL OVERALL; Wrenching Surface Shape: SQUARE SINGLE END INTERNAL. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-224-2577 still in active supply?

NSN 5120-00-224-2577 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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