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PartsTable / COMPONENT / HS4431-4
HS4431-4 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN, material: STEEL PIN, drive_type: SLOTTED, eyelet_length: 0.322 INCHES NOMINAL IN, stud_head_height: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-179-7415, 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
HS4431-4
NSN: 5325-01-179-7415
FSC: 5325
CAGE: 8V613 — THE BOEING COMPANY (USA)
SPECIFICATIONS
diameter0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
materialSTEEL PIN
drive_typeSLOTTED
eyelet_length0.322 INCHES NOMINAL IN
stud_head_height0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
securing_device_typeRING
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT FILLISTER
material_accommodated_thickness0.120 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
material_document_and_classificationASTM A228 ASSN STD SINGLE MATERIAL RESPONSE PIN
NSN5325-01-179-7415
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: HS4431-4 · 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
•
DRIVE TYPE: SLOTTED
•
MATERIAL: STEEL COMP 4037 STUD
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A228 ASSN STD SINGLE MATERIAL RESPONSE PIN
•
DIAMETER: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
•
STUD ASSEMBLY STYLE: STUD ASSEMBLY
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE TYPESLOTTED
MATERIALSTEEL COMP 4037 STUD
MATERIALSTEEL PIN
MATERIALSTEEL COMP 1009 EYELET
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A228 ASSN STD SINGLE MATERIAL RESPONSE PIN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A547 ASSN STD SINGLE MATERIAL RESPONSE EJECTOR SPRING
DIAMETER0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
STUD ASSEMBLY STYLESTUD ASSEMBLY
TURNLOCK STUD HEAD STYLEFLAT FILLISTER
EYELET LENGTH0.322 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
A-A-2540Interchangeable
interchangeable cross-reference
interchangeable
58-115Interchangeable
interchangeable cross-reference
interchangeable
26004Interchangeable
interchangeable cross-reference
interchangeable
1-1398Interchangeable
interchangeable cross-reference
interchangeable
1551Interchangeable
interchangeable cross-reference
interchangeable
420-53-4210Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HS4431-4?
HS4431-4 is a STUD ASSEMBLY,TURNLOCK FASTENER.
What parts can replace HS4431-4?
There are 15 known substitutes for HS4431-4: A-A-2540, 58-115, 26004 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HS4431-4?
HS4431-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-179-7415. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026