PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5-40-1-4Screw,cap,socket Head

All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners · NSN 5305-00-850-3910 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-850-3910 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-850-3910. Primary manufacturer part number: 5-40-1-4.
Features
  • Screw,cap,socket Head — FSC 5305
  • Nominal Thread Diameter: 0.125 INCHES IN
  • Head Style: FLAT CHAMFER
  • Material: STEEL CORROSION RESISTING OVERALL
  • Thread Length: 0.250 INCHES MAXIMUM IN
  • Width Across Flats: 0.078 INCHES NOMINAL IN
  • Head Height: 0.090 INCHES NOMINAL IN
  • Fastener Length: 0.250 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-850-3910, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-850-3910
Primary Part Number5-40-1-4
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerAll Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners
StatusCANCELLED
Nominal Thread Diameter0.125 INCHES IN
Head StyleFLAT CHAMFER
MaterialSTEEL CORROSION RESISTING OVERALL
Thread Length0.250 INCHES MAXIMUM IN
Width Across Flats0.078 INCHES NOMINAL IN
Head Height0.090 INCHES NOMINAL IN
Fastener Length0.250 INCHES NOMINAL IN
Internal Drive StyleHEXAGON
Thread Class3A A
Thread Quantity Per Inch40
Thread DirectionRIGHT-HAND
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Surface TreatmentPASSIVATE OVERALL
Head Diameter0.281 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5905-00-008-165050195 INTERCHANGEABLE
Resistor,variable,wire Wound,non
L'hotellier SAS
4720-00-052-3579 INTERCHANGEABLE
Hose Assembly,nonmetallic
5355-00-090-36656119 INTERCHANGEABLE
Knob,assembly
Viz Manufacturing Company
4730-00-118-753050191 INTERCHANGEABLE
Strainer Element,sediment
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5330-00-171-9380 INTERCHANGEABLE
Seal,plain Encased
5815-00-342-6025 INTERCHANGEABLE
Keytop,keyboard
2940-00-374-8029A27302 INTERCHANGEABLE
Filter,fluid
Cnh Industrial America Llc Dba Cnh America
5998-00-437-3917 INTERCHANGEABLE
Circuit Card Assembly
5360-00-461-601350195 INTERCHANGEABLE
Spring,helical,compression
Woodward Hrt Inc
4520-00-467-532062110200 INTERCHANGEABLE
Cover Assembly,handhole
L & L Boiler Maintenance Inc
Cross-Reference Index
Part NumberManufacturer
5-40-1-4 PRIMARY All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners (USA)
5019-5 New Haven Mfg Corp (USA)
5019-1 New Haven Mfg Corp (USA)
Related Parts
5905-00-008-1650INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
50195
4720-00-052-3579INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
5355-00-090-3665INTERCHANGEABLE
KNOB,ASSEMBLY
6119
4730-00-118-7530INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
50191
5330-00-171-9380INTERCHANGEABLE
SEAL,PLAIN ENCASED
5815-00-342-6025INTERCHANGEABLE
KEYTOP,KEYBOARD
2940-00-374-8029INTERCHANGEABLE
FILTER,FLUID
A27302
5998-00-437-3917INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5360-00-461-6013INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
50195
4520-00-467-5320INTERCHANGEABLE
COVER ASSEMBLY,HANDHOLE
62110200
5945-00-511-9589INTERCHANGEABLE
SOLENOID,ELECTRICAL
50191-1
5985-00-606-8809INTERCHANGEABLE
ATTENUATOR,VARIABLE

Frequently Asked Questions

What is NSN 5305-00-850-3910?

NSN 5305-00-850-3910 is a Screw,cap,socket Head, manufactured by All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners, classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-00-850-3910?

NSN 5305-00-850-3910 has 3 cross-referenced part numbers: 5-40-1-4 (All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners), 5019-5 (New Haven Mfg Corp), 5019-1 (New Haven Mfg Corp).

What NSN replaces 5305-00-850-3910?

There are 12 known substitutes for 5305-00-850-3910: 5905-00-008-1650, 4720-00-052-3579, 5355-00-090-3665 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5-40-1-4?

Key specifications for 5-40-1-4: Nominal Thread Diameter: 0.125 INCHES IN; Head Style: FLAT CHAMFER; Material: STEEL CORROSION RESISTING OVERALL; Thread Length: 0.250 INCHES MAXIMUM IN. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-850-3910 still in active supply?

NSN 5305-00-850-3910 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.
PartsTable Design LLC · partstable.com