PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21809Screw,externally Relieved Body

Bradford Vibrators Co the · NSN 5305-01-159-6552 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-159-6552 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-159-6552. Primary manufacturer part number: 21809.
Features
  • Screw,externally Relieved Body — FSC 5305
  • Nominal Thread Diameter: 0.190 INCHES IN
  • First Diameter From Head: 0.156 INCHES NOMINAL IN
  • Distance From Largest Bearing Surface of Head to End of First Diameter: 0.281 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
  • Head Style: FLAT CHAMFER
  • Fastener Length: 0.625 INCHES NOMINAL IN
  • Internal Drive Style: SLOT
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 302 or Steel Comp 303 or Steel Comp 304 or Steel Comp 305 Overall construction
General Description

The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-159-6552, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bradford Vibrators Co the. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-159-6552
Primary Part Number21809
Item NameScrew,externally Relieved Body
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerBradford Vibrators Co the
StatusACTIVE
Nominal Thread Diameter0.190 INCHES IN
First Diameter From Head0.156 INCHES NOMINAL IN
Distance From Largest Bearing Surface of Head to End of First Diameter0.281 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Head StyleFLAT CHAMFER
Fastener Length0.625 INCHES NOMINAL IN
Internal Drive StyleSLOT
Thread Quantity Per Inch32
Head Diameter0.562 INCHES NOMINAL IN
Material Document and ClassificationQQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTMA582 ASSN STD 2ND MATERIAL RESPONSE OR QQ-S-763 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-763 FED SPEC 4TH MATERIAL RESPONSE OVERALL
Surface Treatment Document and ClassificationMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MaterialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OVERALL
Thread Length0.219 INCHES NOMINAL IN
Head Height0.188 INCHES NOMINAL IN
Externally Relieved Body Diameter Quantity1
Thread Series DesignatorUNF
Thread Class2A A
Surface TreatmentOXIDE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5961-01-125-51912N5988 INTERCHANGEABLE
Transistor
Texas Instruments Incorporated
5950-01-210-109921809 INTERCHANGEABLE
Transformer,power
Westerbeke Corporation
4810-01-492-021021065-004 INTERCHANGEABLE
Valve,ball
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-495-342521349-1010-1 INTERCHANGEABLE
Piston,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4730-01-517-0500 INTERCHANGEABLE
Elbow,tube
Cross-Reference Index
Part NumberManufacturer
21809 PRIMARY Bradford Vibrators Co the (USA)
Related Parts
5961-01-125-5191INTERCHANGEABLE
TRANSISTOR
2N5988
5950-01-210-1099INTERCHANGEABLE
TRANSFORMER,POWER
21809
4810-01-492-0210INTERCHANGEABLE
VALVE,BALL
21065-004
4820-01-495-3425INTERCHANGEABLE
PISTON,VALVE
21349-1010-1
4730-01-517-0500INTERCHANGEABLE
ELBOW,TUBE

Frequently Asked Questions

What is NSN 5305-01-159-6552?

NSN 5305-01-159-6552 is a Screw,externally Relieved Body, manufactured by Bradford Vibrators Co the, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-159-6552?

NSN 5305-01-159-6552 has 1 cross-referenced part number: 21809 (Bradford Vibrators Co the).

What NSN replaces 5305-01-159-6552?

There are 5 known substitutes for 5305-01-159-6552: 5961-01-125-5191, 5950-01-210-1099, 4810-01-492-0210 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21809?

Key specifications for 21809: Nominal Thread Diameter: 0.190 INCHES IN; First Diameter From Head: 0.156 INCHES NOMINAL IN; Distance From Largest Bearing Surface of Head to End of First Diameter: 0.281 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND. 19 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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