PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

78012Key,socket Head Screw

Allen Mfg Co Sub of Chicago Pneumatic Tool Co · NSN 5120-00-798-2133 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-798-2133 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-798-2133. Primary manufacturer part number: 78012.
Features
  • Key,socket Head Screw — FSC 5120
  • Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Wrenching Surface Shape: HEXAGON SINGLE END EXTERNAL
  • Style Designator: TEE HANDLE
  • Surface Treatment: OXIDE OVERALL
  • Features Provided: REPLACEABLE WRENCHING FEATURE
  • Wrenching Surface Size: 0.250 INCHES NOMINAL SINGLE END IN
  • Material: STEEL OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Key,socket Head Screw, cataloged under National Stock Number 5120-00-798-2133, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Allen Mfg Co Sub of Chicago Pneumatic Tool Co. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-798-2133
Primary Part Number78012
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerAllen Mfg Co Sub of Chicago Pneumatic Tool Co
StatusCANCELLED
Specification/standard Data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Wrenching Surface ShapeHEXAGON SINGLE END EXTERNAL
Style DesignatorTEE HANDLE
Surface TreatmentOXIDE OVERALL
Features ProvidedREPLACEABLE WRENCHING FEATURE
Wrenching Surface Size0.250 INCHES NOMINAL SINGLE END IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
1610-00-388-889178012 INTERCHANGEABLE
Sleeve,reverse Stop
Hamilton Sundstrand Corporation Dba Collins Aerospace
5330-00-580-977860914 INTERCHANGEABLE
Seal,plain Encased
Dana Automotive Systems Group, Llc Dba Dana Sealing Products
5998-01-083-1573 INTERCHANGEABLE
Circuit Card Assembly
5962-01-263-9190 INTERCHANGEABLE
Microcircuit,digital
5998-01-400-1340 INTERCHANGEABLE
Circuit Card Assembly
8465-01-565-102360914 INTERCHANGEABLE
Hydration System
Camelbak Products, Llc Dba Camelbak
6515-01-576-3626780-12 INTERCHANGEABLE
Circuit,ventilator,medical
Teleflex Llc
1680-01-579-248778012 INTERCHANGEABLE
Bracket,eye,nonrotating Shaft
Lockheed Martin Corporation
5330-01-711-159078012 INTERCHANGEABLE
Gasket
Williams International Co., L.l.c.
Cross-Reference Index
Part NumberManufacturer
78012 Allen Mfg Co Sub of Chicago Pneumatic Tool Co (USA)
B18.3 The American Society of Mechanical Engineers (USA)
GGG-K-275 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
609 1/4 Allen Mfg Co Sub of Chicago Pneumatic Tool Co (USA)
GGG-K-275 TY6STA General Services Administration Federal Supply Service (USA)
Related Parts
1610-00-388-8891INTERCHANGEABLE
SLEEVE,REVERSE STOP
78012
5330-00-580-9778INTERCHANGEABLE
SEAL,PLAIN ENCASED
60914
5998-01-083-1573INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5962-01-263-9190INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5998-01-400-1340INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
8465-01-565-1023INTERCHANGEABLE
HYDRATION SYSTEM
60914
6515-01-576-3626INTERCHANGEABLE
CIRCUIT,VENTILATOR,MEDICAL
780-12
1680-01-579-2487INTERCHANGEABLE
BRACKET,EYE,NONROTATING SHAFT
78012
5330-01-711-1590INTERCHANGEABLE
GASKET
78012

Frequently Asked Questions

What is NSN 5120-00-798-2133?

NSN 5120-00-798-2133 is a Key,socket Head Screw, manufactured by Allen Mfg Co Sub of Chicago Pneumatic Tool Co, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-798-2133?

NSN 5120-00-798-2133 has 5 cross-referenced part numbers: 78012 (Allen Mfg Co Sub of Chicago Pneumatic Tool Co), B18.3 (The American Society of Mechanical Engineers), GGG-K-275 (Federal Specifications Promulgated by General Services Administration Washington DC), 609 1/4 (Allen Mfg Co Sub of Chicago Pneumatic Tool Co), GGG-K-275 TY6STA (General Services Administration Federal Supply Service).

What NSN replaces 5120-00-798-2133?

There are 9 known substitutes for 5120-00-798-2133: 1610-00-388-8891, 5330-00-580-9778, 5998-01-083-1573 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 78012?

Key specifications for 78012: Overall Width: 4.500 INCHES NOMINAL IN; Overall Length: 6.375 INCHES MINIMUM AND 6.875 INCHES MAXIMUM IN; Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Wrenching Surface Shape: HEXAGON SINGLE END EXTERNAL. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-798-2133 still in active supply?

NSN 5120-00-798-2133 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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