The Setscrew, cataloged under National Stock Number 5305-00-435-5993, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Spencer Industries Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-435-5993 |
| Primary Part Number | 423R239H01 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Spencer Industries Inc |
| Status | ACTIVE |
| Spline Minor Diameter | 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN |
| Point Diameter | 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Point Length | 0.420 INCHES NOMINAL IN |
| Fastener Length | 0.620 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Spline Width | 0.021 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN |
| Thread Length | 0.150 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Spline Major Diameter | 0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN |
| Point Chamfer Angle | 90.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | SIX SPLINE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 423R239H01 | Spencer Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 423R239H01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-435-5993 is a Setscrew, manufactured by Spencer Industries Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-435-5993 has 1 manufacturer part number on file: 423R239H01 (Spencer Industries Inc).
Key specifications for 423R239H01: Spline Minor Diameter: 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN; Point Diameter: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN; Point Length: 0.420 INCHES NOMINAL IN; Fastener Length: 0.620 INCHES NOMINAL IN. 20 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.