PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31687Setscrew

Valcor Engineering Corporation · NSN 5305-00-009-3369 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-009-3369 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-009-3369. Primary manufacturer part number: 31687.
Features
  • Setscrew — FSC 5305
  • Head Diameter: 0.250 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
  • Material: STEEL CORROSION RESISTING OVERALL
  • Nominal Thread Diameter: 0.138 INCHES IN
  • Thread Quantity Per Inch: 32
  • Thread Class: 3A A
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
Applications
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Setscrew, cataloged under National Stock Number 5305-00-009-3369, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Valcor Engineering Corporation. Government technical data includes 12 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-009-3369
Primary Part Number31687
Item NameSetscrew
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerValcor Engineering Corporation
StatusACTIVE
Head Diameter0.250 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
MaterialSTEEL CORROSION RESISTING OVERALL
Nominal Thread Diameter0.138 INCHES IN
Thread Quantity Per Inch32
Thread Class3A A
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Point Length0.050 INCHES NOMINAL IN
Countersink Angle90.0 DEGREES NOMINAL
Point Chamfer Angle45.0 DEGREES NOMINAL
Point StyleFLAT
Internal Drive StyleSLOT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
2940-00-133-9969 INTERCHANGEABLE
Filter Element,fluid
6540-01-603-50971370 INTERCHANGEABLE
Refractor,illuminated
Lombart Brothers, Inc Dba Marco Lombart Div Marco Lombart
Cross-Reference Index
Part NumberManufacturer
31687 PRIMARY Valcor Engineering Corporation (USA)
31687 Kidde-Fenwal, Llc (USA)
Related Parts
2940-00-133-9969INTERCHANGEABLE
FILTER ELEMENT,FLUID
6540-01-603-5097INTERCHANGEABLE
REFRACTOR,ILLUMINATED
1370

Frequently Asked Questions

What is NSN 5305-00-009-3369?

NSN 5305-00-009-3369 is a Setscrew, manufactured by Valcor Engineering Corporation, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-009-3369?

NSN 5305-00-009-3369 has 2 cross-referenced part numbers: 31687 (Valcor Engineering Corporation), 31687 (Kidde-Fenwal, Llc).

What NSN replaces 5305-00-009-3369?

There are 2 known substitutes for 5305-00-009-3369: 2940-00-133-9969, 6540-01-603-5097. Verify interchangeability with system specifications before substitution.

What are the specifications of 31687?

Key specifications for 31687: Head Diameter: 0.250 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND; Material: STEEL CORROSION RESISTING OVERALL; Nominal Thread Diameter: 0.138 INCHES IN. 12 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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