PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30155-2-6Screw,cap,socket Head

Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems · NSN 5305-00-224-1145 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-224-1145 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-224-1145. Primary manufacturer part number: 30155-2-6.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Direction: RIGHT-HAND
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
  • Material: STEEL COMP 4037 OVERALL
  • Thread Length: 0.323 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
  • Head Diameter: 0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN
  • Spline Minor Diameter: 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4037 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-224-1145, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN5305-00-224-1145
Primary Part Number30155-2-6
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerUndersea Sensor Systems Inc Div Ultra Sonobuoy Systems
StatusACTIVE
Thread DirectionRIGHT-HAND
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Hardness Rating36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
MaterialSTEEL COMP 4037 OVERALL
Thread Length0.323 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
Head Diameter0.154 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN
Spline Minor Diameter0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
Head Height0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
Head StyleBUTTON
Spline Width0.013 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN
Nominal Thread Diameter0.086 INCHES IN
Thread Class3A A
Internal Drive StyleSIX SPLINE
Spline Major Diameter0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
Thread Quantity Per Inch56
Fastener Length0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-061-1571 INTERCHANGEABLE
Bushing,sleeve
5330-00-082-10452566 INTERCHANGEABLE
Gasket
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
5330-00-172-67232566 INTERCHANGEABLE
Gasket
Cummins Inc.
5915-00-256-1482 INTERCHANGEABLE
Suppressor,parasitic
5325-00-276-6056 INTERCHANGEABLE
Grommet,nonmetallic
6640-00-294-0710 INTERCHANGEABLE
Beaker,laboratory
5120-00-596-10345120-00-596-1034 INTERCHANGEABLE
Adjusting Tool,brake Shoe
Woodings Verona Tool Works Inc
5915-01-038-6201 INTERCHANGEABLE
Filter,low Pass
5950-01-049-82892-566 INTERCHANGEABLE
Reactor
Eldec Aerospace Corp
6930-01-095-97922566 INTERCHANGEABLE
Ring,flang
Crown Audio, Inc. Dba Crown International
Cross-Reference Index
Part NumberManufacturer
2-56-6 Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc (USA)
30155-2-6 PRIMARY Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA)
Related Parts
3120-00-061-1571INTERCHANGEABLE
BUSHING,SLEEVE
5330-00-082-1045INTERCHANGEABLE
GASKET
2566
5330-00-172-6723INTERCHANGEABLE
GASKET
2566
5915-00-256-1482INTERCHANGEABLE
SUPPRESSOR,PARASITIC
5325-00-276-6056INTERCHANGEABLE
GROMMET,NONMETALLIC
6640-00-294-0710INTERCHANGEABLE
BEAKER,LABORATORY
5120-00-596-1034INTERCHANGEABLE
ADJUSTING TOOL,BRAKE SHOE
5120-00-596-1034
5915-01-038-6201INTERCHANGEABLE
FILTER,LOW PASS
5950-01-049-8289INTERCHANGEABLE
REACTOR
2-566
6930-01-095-9792INTERCHANGEABLE
RING,FLANG
2566
4820-01-419-5620INTERCHANGEABLE
VALVE,SAFETY RELIEF
2566
3120-01-479-8050INTERCHANGEABLE
BEARING,SLEEVE
2566

Frequently Asked Questions

What is NSN 5305-00-224-1145?

NSN 5305-00-224-1145 is a Screw,cap,socket Head, manufactured by Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-224-1145?

NSN 5305-00-224-1145 has 2 cross-referenced part numbers: 2-56-6 (Bristol Babcock Inc Instruments-Systems Div Sub of Babcock Intl Inc), 30155-2-6 (Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems).

What NSN replaces 5305-00-224-1145?

There are 12 known substitutes for 5305-00-224-1145: 3120-00-061-1571, 5330-00-082-1045, 5330-00-172-6723 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30155-2-6?

Key specifications for 30155-2-6: Thread Direction: RIGHT-HAND; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL; Material: STEEL COMP 4037 OVERALL. 17 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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