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423R239H01 — SETSCREW

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

423R239H01: SETSCREW.

The SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL, head_style: HEADLESS (SETSCREW), point_style: FLAT, point_length: 0.420 INCHES NOMINAL IN, spline_width: 0.021 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-435-5993, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
423R239H01
NSN: 5305-00-435-5993
FSC: 5305 — Screws
CAGE: 97942 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
head_styleHEADLESS (SETSCREW)
point_styleFLAT
point_length0.420 INCHES NOMINAL IN
spline_width0.021 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN
thread_class3A A
thread_length0.150 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
point_diameter0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
fastener_length0.620 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
point_chamfer_angle90.0 DEGREES NOMINAL
NSN5305-00-435-5993
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 423R239H01 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
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
TECHNICAL CHARACTERISTICS
SPLINE MINOR DIAMETER0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
POINT DIAMETER0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
POINT LENGTH0.420 INCHES NOMINAL IN
FASTENER LENGTH0.620 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SPLINE WIDTH0.021 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN
THREAD LENGTH0.150 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
SPLINE MAJOR DIAMETER0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
POINT CHAMFER ANGLE90.0 DEGREES NOMINAL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 423R239H01?
423R239H01 is a SETSCREW.
What is the NSN for 423R239H01?
423R239H01 is cataloged in the U.S. Government catalog under NSN 5305-00-435-5993. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.