PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SD-1236Socket,socket Wrench

Martin Sprocket and Gear Inc · NSN 5120-00-243-7339 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-243-7339 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-243-7339. Primary manufacturer part number: SD-1236.
Features
  • Socket,socket Wrench — FSC 5120
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Material: STEEL OVERALL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Specification/standard Data: 0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Special Markings: 1-1/8 IN. IN
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-00-243-7339, 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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-243-7339
Primary Part NumberSD-1236
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerMartin Sprocket and Gear Inc
StatusCANCELLED
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
MaterialSTEEL OVERALL
Drive End ShapeSQUARE SINGLE END INTERNAL
Surface TreatmentCHROMIUM OVERALL
Specification/standard Data0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Special Markings1-1/8 IN. IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Style DesignatorINTERNAL-INTERNAL
Environmental Attribute CodePLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND B STYLE
Features ProvidedMANUAL TOOL
Wrenching Surface Size1.125 INCHES NOMINAL SINGLE END IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5120-00-235-5898 INTERCHANGEABLE
Socket,socket Wrench
5120-00-242-3349 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7340 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7341 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7342 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7343J5330 INTERCHANGEABLE
Socket,socket Wrench
The Stanley Works Dba Stanley Proto
5120-00-243-7345 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7346 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7348 INTERCHANGEABLE
Socket,socket Wrench
5120-00-243-7350 INTERCHANGEABLE
Socket,socket Wrench
Cross-Reference Index
Part NumberManufacturer
SD-1236 Martin Sprocket and Gear Inc (USA)
A-A-1398 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
AS954 TY1CL1STB General Services Administration Federal Supply Service (USA)
0737 2304 Blackwood J. Blackwood & Son Pty Ltd (AUS)
97-3935 Martin Sprocket and Gear Inc (USA)
AS954 Society of Automotive Engineers Inc (USA)
GGG-W-641 TY2CL2STB General Services Administration Federal Supply Service (USA)
B107.1 TY1CL2 General Services Administration Federal Supply Service (USA)
M3-129 Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons (USA)
B107.1 CL1STB General Services Administration Federal Supply Service (USA)
GGG-W-641 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
B107.1 The American Society of Mechanical Engineers (USA)
5191315 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
SD-1236 Trw Inc Hand Tools Div Trw Industrial Products Group (USA)
AS954 Sae International Dba Sae International (USA)
Related Parts
5120-00-235-5898INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-242-3349INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7340INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7341INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7342INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7343INTERCHANGEABLE
SOCKET,SOCKET WRENCH
J5330
5120-00-243-7345INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7346INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7348INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7350INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-243-7351INTERCHANGEABLE
SOCKET,SOCKET WRENCH
J5316
3040-00-868-3582INTERCHANGEABLE
GEARSHAFT,SPUR

Frequently Asked Questions

What is NSN 5120-00-243-7339?

NSN 5120-00-243-7339 is a Socket,socket Wrench, manufactured by Martin Sprocket and Gear Inc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-243-7339?

NSN 5120-00-243-7339 has 15 cross-referenced part numbers: SD-1236 (Martin Sprocket and Gear Inc), A-A-1398 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), AS954 TY1CL1STB (General Services Administration Federal Supply Service), 0737 2304 (Blackwood J. Blackwood & Son Pty Ltd), 97-3935 (Martin Sprocket and Gear Inc) and 10 more.

What NSN replaces 5120-00-243-7339?

There are 12 known substitutes for 5120-00-243-7339: 5120-00-235-5898, 5120-00-242-3349, 5120-00-243-7340 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SD-1236?

Key specifications for SD-1236: Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN; Material: STEEL OVERALL; Drive End Shape: SQUARE SINGLE END INTERNAL; Surface Treatment: CHROMIUM OVERALL. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-243-7339 still in active supply?

NSN 5120-00-243-7339 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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