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Technical Data Sheet
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BL-4724 — Technical Data Sheet

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— · 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

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 FASTENER, head_style: HEADLESS (SETSCREW), point_style: CUP, spline_width: 0.022 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-837-9918, 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
BL-4724
NSN: 5305-00-837-9918
FSC: 5305
CAGE: 08484 — BREEZE-EASTERN LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 FASTENER
head_styleHEADLESS (SETSCREW)
point_styleCUP
spline_width0.022 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN
thread_class3A A
thread_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
fastener_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
locking_featureSTRIP THREADS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE FASTENER
internal_drive_styleFOUR SPLINE
NSN5305-00-837-9918
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BL-4724 · 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
•
HEAD STYLE: HEADLESS (SETSCREW)
•
SPLINE MINOR DIAMETER: 0.055 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
•
POINT STYLE: CUP
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
•
MATERIAL: STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 FASTENER
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 4 STYLE
•
SURFACE TREATMENT: CADMIUM AND CHROMATE FASTENER
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEADLESS (SETSCREW)
SPLINE MINOR DIAMETER0.055 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
POINT STYLECUP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
MATERIALSTEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 FASTENER
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 4 STYLE
SURFACE TREATMENTCADMIUM AND CHROMATE FASTENER
LOCKING FEATURESTRIP THREADS
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
FFS200Interchangeable
Same NIIN cross-reference
interchangeable
LP565D6L5Interchangeable
Setscrew
interchangeable
LP65XD62K5Interchangeable
Setscrew
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BL-4724?
BL-4724 is a SETSCREW.
What parts can replace BL-4724?
There are 3 known substitutes for BL-4724: FFS200, LP565D6L5, LP65XD62K5. Substitute compatibility should be verified for your specific system.
What is the NSN for BL-4724?
BL-4724 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-837-9918. This indicates validated use in U.S. government and defense supply chains.
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Last verified: September 2026