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Technical Data Sheet
PartsTable / COMPONENT / KR520-38
KR520-38 ✓ 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

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL, head_style: HEXAGON, head_height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.000 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN, fastener_length: 1.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-717-5467, 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
KR520-38
NSN: 5305-00-717-5467
FSC: 5305
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL
head_styleHEXAGON
head_height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
thread_class2A A
thread_length1.000 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN
fastener_length1.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
nominal_thread_diameter0.375 INCHES IN
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
NSN5305-00-717-5467
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: KR520-38 · 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
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
THREAD QUANTITY PER INCH: 16
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
FASTENER LENGTH: 1.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
NOMINAL THREAD DIAMETER0.375 INCHES IN
THREAD QUANTITY PER INCH16
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
FASTENER LENGTH1.250 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
HEAD STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
28332Interchangeable
interchangeable cross-reference
interchangeable
PK5Interchangeable
interchangeable cross-reference
interchangeable
F2.5Interchangeable
interchangeable cross-reference
interchangeable
61-94-8184Interchangeable
interchangeable cross-reference
interchangeable
H102S-3/4Interchangeable
interchangeable cross-reference
interchangeable
87725-3601 PIECE 35Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KR520-38?
KR520-38 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace KR520-38?
There are 29 known substitutes for KR520-38: 28332, PK5, F2.5 and 26 more. Substitute compatibility should be verified for your specific system.
Is KR520-38 still available?
KR520-38 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026