PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4312APlug,pipe

Brinkley Technology Group Llc Dba Hercules Manufacturing · NSN 4730-00-278-3412 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-278-3412 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-278-3412. Primary manufacturer part number: 4312A.
Features
  • Plug,pipe — FSC 4730
  • Nominal Thread Size: 0.500 INCHES EXTERNAL IN
  • Nominal Pipe Size for Which Designed: 0.500 INCHES IN
  • Drive End Style: RAISED SQUARE
  • Thread Direction: RIGHT-HAND EXTERNAL
  • Nondefinitive Spec/std Data: 2 TYPE
  • Material Document and Classification: QQ-I-666,GRADE2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Thread Series Designator: NPT EXTERNAL
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron Overall construction
General Description

The Plug,pipe, cataloged under National Stock Number 4730-00-278-3412, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 9 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-278-3412
Primary Part Number4312A
Item NamePlug,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerBrinkley Technology Group Llc Dba Hercules Manufacturing
StatusACTIVE
Nominal Thread Size0.500 INCHES EXTERNAL IN
Nominal Pipe Size for Which Designed0.500 INCHES IN
Drive End StyleRAISED SQUARE
Thread DirectionRIGHT-HAND EXTERNAL
Nondefinitive Spec/std Data2 TYPE
Material Document and ClassificationQQ-I-666,GRADE2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Thread Series DesignatorNPT EXTERNAL
MaterialIRON OVERALL
Connection StylePLAIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-010-3880103880 INTERCHANGEABLE
Plug,pipe
Rolls-Royce Solutions America Inc
4730-00-142-25826602 INTERCHANGEABLE
Bushing,pipe
Fwd Seagrave Holdings Lp
4730-00-193-0907 INTERCHANGEABLE
Bushing,pipe
4730-00-196-0868 INTERCHANGEABLE
Bushing,pipe
4730-00-277-1844 INTERCHANGEABLE
Bushing,pipe
4730-00-277-2654 INTERCHANGEABLE
Bushing,pipe
4730-00-277-5597 INTERCHANGEABLE
Bushing,pipe
4730-00-640-6201 INTERCHANGEABLE
Bushing,pipe
6695-00-972-75454-312A INTERCHANGEABLE
Transducer,motional Pickup
Omega Engineering Inc Dba Omegadyne Div Omega Pressure
5315-01-136-721116166 INTERCHANGEABLE
Pin
Westerbeke Corporation
Cross-Reference Index
Part NumberManufacturer
BM12280-67-04 Demarkus Corp Refrigeration Engineering Corp (USA)
4312A PRIMARY Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
16166 Demarkus Corp Refrigeration Engineering Corp (USA)
WWP471TYPE1 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
4312A Hercules Engine Co Inc (USA)
Related Parts
4730-00-010-3880INTERCHANGEABLE
PLUG,PIPE
103880
4730-00-142-2582INTERCHANGEABLE
BUSHING,PIPE
6602
4730-00-193-0907INTERCHANGEABLE
BUSHING,PIPE
4730-00-196-0868INTERCHANGEABLE
BUSHING,PIPE
4730-00-277-1844INTERCHANGEABLE
BUSHING,PIPE
4730-00-277-2654INTERCHANGEABLE
BUSHING,PIPE
4730-00-277-5597INTERCHANGEABLE
BUSHING,PIPE
4730-00-640-6201INTERCHANGEABLE
BUSHING,PIPE
6695-00-972-7545INTERCHANGEABLE
TRANSDUCER,MOTIONAL PICKUP
4-312A
5315-01-136-7211INTERCHANGEABLE
PIN
16166
5930-01-368-8466INTERCHANGEABLE
SWITCH,TOGGLE
16166
3110-01-423-7728INTERCHANGEABLE
BEARING,BALL,ANNULAR
4312-A

Frequently Asked Questions

What is NSN 4730-00-278-3412?

NSN 4730-00-278-3412 is a Plug,pipe, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-278-3412?

NSN 4730-00-278-3412 has 5 cross-referenced part numbers: BM12280-67-04 (Demarkus Corp Refrigeration Engineering Corp), 4312A (Brinkley Technology Group Llc Dba Hercules Manufacturing), 16166 (Demarkus Corp Refrigeration Engineering Corp), WWP471TYPE1 (Federal Specifications Promulgated by General Services Administration Washington DC), 4312A (Hercules Engine Co Inc).

What NSN replaces 4730-00-278-3412?

There are 12 known substitutes for 4730-00-278-3412: 4730-00-010-3880, 4730-00-142-2582, 4730-00-193-0907 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4312A?

Key specifications for 4312A: Nominal Thread Size: 0.500 INCHES EXTERNAL IN; Nominal Pipe Size for Which Designed: 0.500 INCHES IN; Drive End Style: RAISED SQUARE; Thread Direction: RIGHT-HAND EXTERNAL. 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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