PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

45121Plug,machine Thread

Drs Environmental Systems Inc · NSN 5365-00-050-7939 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-050-7939 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-050-7939. Primary manufacturer part number: 45121.
Features
  • Plug,machine Thread — FSC 5365
  • Core Depth: 0.375 INCHES NOMINAL IN
  • Thread Length: 0.105 INCHES NOMINAL EXTERNAL IN
  • Thread Series Designator: UNF EXTERNAL
  • Style Designator: PLUG, MACHINE
  • Body Core Diameter: 0.281 INCHES NOMINAL IN
  • Thread Class: 2A EXTERNAL A
  • Nominal Thread Size: 0.438 INCHES EXTERNAL IN
Applications
  • Applications requiring Copper Alloy 11 Overall construction
General Description

The Plug,machine Thread, cataloged under National Stock Number 5365-00-050-7939, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Drs Environmental Systems Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5365-00-050-7939
Primary Part Number45121
Item NamePlug,machine Thread
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerDrs Environmental Systems Inc
StatusACTIVE
Core Depth0.375 INCHES NOMINAL IN
Thread Length0.105 INCHES NOMINAL EXTERNAL IN
Thread Series DesignatorUNF EXTERNAL
Style DesignatorPLUG, MACHINE
Body Core Diameter0.281 INCHES NOMINAL IN
Thread Class2A EXTERNAL A
Nominal Thread Size0.438 INCHES EXTERNAL IN
Thread DirectionRIGHT-HAND EXTERNAL
Connection StylePLAIN
Material Document and ClassificationQQ-B-613,1/2H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialCOPPER ALLOY 11 OVERALL
Head Height0.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4310-00-397-312645121 INTERCHANGEABLE
Ring,piston
Leroi International Inc Dba Compair Leroi
3455-00-455-9096B-12 INTERCHANGEABLE
Cutter,milling,end
Pohl Tool Co
5955-00-795-462245121 INTERCHANGEABLE
Oscillating Group
L3harris Technologies, Inc. Div Space and Airborne Systems
5110-01-011-3881 INTERCHANGEABLE
Stripper,wire,hand
2510-01-096-949645121 INTERCHANGEABLE
Spring Assembly,leaf
Hme, Inc. Dba Hme Ahrens-Fox
5365-01-238-0422 INTERCHANGEABLE
Ring,special
5930-01-322-451345121 INTERCHANGEABLE
Switch,flow
Setra Systems, Inc. Dba Gems Sensors
5930-01-354-9794 INTERCHANGEABLE
Switch,toggle
3455-01-365-1664307-13 INTERCHANGEABLE
Cutter,milling,side
Kennametal Inc. Div Kennametal Industrial Products Group
5340-01-432-400745121 INTERCHANGEABLE
Strap,retaining
Tyco Fire Products Lp
Cross-Reference Index
Part NumberManufacturer
45121 Drs Environmental Systems Inc (USA)
45121 Davey Compressor Co Div of Keco Industries Inc (USA)
45121 Hdt Expeditionary Systems Inc (USA)
45121 Keco Industries, Inc. (USA)
Related Parts
4310-00-397-3126INTERCHANGEABLE
RING,PISTON
45121
3455-00-455-9096INTERCHANGEABLE
CUTTER,MILLING,END
B-12
5955-00-795-4622INTERCHANGEABLE
OSCILLATING GROUP
45121
5110-01-011-3881INTERCHANGEABLE
STRIPPER,WIRE,HAND
2510-01-096-9496INTERCHANGEABLE
SPRING ASSEMBLY,LEAF
45121
5365-01-238-0422INTERCHANGEABLE
RING,SPECIAL
5930-01-322-4513INTERCHANGEABLE
SWITCH,FLOW
45121
5930-01-354-9794INTERCHANGEABLE
SWITCH,TOGGLE
3455-01-365-1664INTERCHANGEABLE
CUTTER,MILLING,SIDE
307-13
5340-01-432-4007INTERCHANGEABLE
STRAP,RETAINING
45121
5305-01-591-5777INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
45121
7025-01-642-1899INTERCHANGEABLE
INTERFACE UNIT,AUTOMATIC DATA PR
45121

Frequently Asked Questions

What is NSN 5365-00-050-7939?

NSN 5365-00-050-7939 is a Plug,machine Thread, manufactured by Drs Environmental Systems Inc, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-050-7939?

NSN 5365-00-050-7939 has 4 cross-referenced part numbers: 45121 (Drs Environmental Systems Inc), 45121 (Davey Compressor Co Div of Keco Industries Inc), 45121 (Hdt Expeditionary Systems Inc), 45121 (Keco Industries, Inc.).

What NSN replaces 5365-00-050-7939?

There are 12 known substitutes for 5365-00-050-7939: 4310-00-397-3126, 3455-00-455-9096, 5955-00-795-4622 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 45121?

Key specifications for 45121: Core Depth: 0.375 INCHES NOMINAL IN; Thread Length: 0.105 INCHES NOMINAL EXTERNAL IN; Thread Series Designator: UNF EXTERNAL; Style Designator: PLUG, MACHINE. 13 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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