PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1231Locknut,pipe

Itt Grinnell Corp · NSN 4730-00-277-7877 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-277-7877 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-277-7877. Primary manufacturer part number: 1231.
Features
  • Locknut,pipe — FSC 4730
  • Thread Series: NPSL
  • Packing Recess Depth: 0.0625 INCHES NOMINAL IN
  • Packing Recess Diameter: 1.563 INCHES NOMINAL IN
  • Width Across Flats: 1.750 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 11-1/2
  • Nominal Thread Size: 1.000 INCHES IN
  • Material: COPPER ALLOY OVERALL
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Locknut,pipe, cataloged under National Stock Number 4730-00-277-7877, 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 Itt Grinnell Corp. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN4730-00-277-7877
Primary Part Number1231
Item NameLocknut,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerItt Grinnell Corp
StatusACTIVE
Thread SeriesNPSL
Packing Recess Depth0.0625 INCHES NOMINAL IN
Packing Recess Diameter1.563 INCHES NOMINAL IN
Width Across Flats1.750 INCHES NOMINAL IN
Thread Quantity Per Inch11-1/2
Nominal Thread Size1.000 INCHES IN
MaterialCOPPER ALLOY OVERALL
Nut StylePIPE LOCKNUT
Thread DirectionRIGHT-HAND
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6610-00-074-955312311 INTERCHANGEABLE
Brush Assy,electric
Moog Inc.
5340-00-079-2188A1684-4 INTERCHANGEABLE
Handle,bow
Unicorp.
5133-00-227-9653 INTERCHANGEABLE
Drill,twist
5133-00-228-1381 INTERCHANGEABLE
Drill,twist
5985-00-434-49872575708 INTERCHANGEABLE
Switch,waveguide
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5930-00-444-6737 INTERCHANGEABLE
Switch Subassembly
5950-00-863-3604SM-C-433516 INTERCHANGEABLE
Transformer,radio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5995-01-049-3955 INTERCHANGEABLE
Cable Assembly,special Purpose,e
6645-01-142-4566 INTERCHANGEABLE
Meter,time Totalizing
6240-01-181-9565530506-231 INTERCHANGEABLE
Lamp,incandescent
Bausch & Lomb Inc
Cross-Reference Index
Part NumberManufacturer
1231 Itt Grinnell Corp (USA)
1231-1 Itt Grinnell Corp (USA)
Related Parts
6610-00-074-9553INTERCHANGEABLE
BRUSH ASSY,ELECTRIC
12311
5340-00-079-2188INTERCHANGEABLE
HANDLE,BOW
A1684-4
5133-00-227-9653INTERCHANGEABLE
DRILL,TWIST
5133-00-228-1381INTERCHANGEABLE
DRILL,TWIST
5985-00-434-4987INTERCHANGEABLE
SWITCH,WAVEGUIDE
2575708
5930-00-444-6737INTERCHANGEABLE
SWITCH SUBASSEMBLY
5950-00-863-3604INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
SM-C-433516
5995-01-049-3955INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
6645-01-142-4566INTERCHANGEABLE
METER,TIME TOTALIZING
6240-01-181-9565INTERCHANGEABLE
LAMP,INCANDESCENT
530506-231
2590-01-352-5131INTERCHANGEABLE
BRACKET,VEHICULAR COMPONENTS
12311
5120-01-430-7959INTERCHANGEABLE
SOCKET,SOCKET WRENCH

Frequently Asked Questions

What is NSN 4730-00-277-7877?

NSN 4730-00-277-7877 is a Locknut,pipe, manufactured by Itt Grinnell Corp, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-277-7877?

NSN 4730-00-277-7877 has 2 cross-referenced part numbers: 1231 (Itt Grinnell Corp), 1231-1 (Itt Grinnell Corp).

What NSN replaces 4730-00-277-7877?

There are 12 known substitutes for 4730-00-277-7877: 6610-00-074-9553, 5340-00-079-2188, 5133-00-227-9653 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1231?

Key specifications for 1231: Thread Series: NPSL; Packing Recess Depth: 0.0625 INCHES NOMINAL IN; Packing Recess Diameter: 1.563 INCHES NOMINAL IN; Width Across Flats: 1.750 INCHES NOMINAL IN. 10 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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