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Technical Data Sheet
PartsTable / COMPONENT / 500400-20
500400-20 ✓ 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 head_style: HEXAGON, head_height: 0.312 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 2.250 INCHES MAXIMUM IN, fastener_length: 2.250 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-071-2072, 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
500400-20
NSN: 5305-00-071-2072
FSC: 5305
CAGE: 97271 — DANA LIGHT AXLE PRODUCTS, LLC DBA DANA LIGHT AXLE PRODUCTS (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.312 INCHES NOMINAL IN
thread_class2A A
thread_length2.250 INCHES MAXIMUM IN
fastener_length2.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.750 INCHES NOMINAL IN
nominal_thread_diameter0.500 INCHES IN
minimum_tensile_strength120000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch13
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
NSN5305-00-071-2072
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 500400-20 · 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: HEXAGON
•
MATERIAL: STEEL OVERALL
•
MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH LBS
•
MINIMUM YIELD STRENGTH: 120000 POUNDS PER SQUARE INCH LBS
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAEJ429 GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A354 GRADE BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
THREAD QUANTITY PER INCH: 13
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEXAGON
MATERIALSTEEL OVERALL
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
MINIMUM YIELD STRENGTH120000 POUNDS PER SQUARE INCH LBS
MATERIAL DOCUMENT AND CLASSIFICATIONSAEJ429 GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A354 GRADE BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.500 INCHES IN
END ITEM IDENTIFICATIONMRAP AUV RG-33; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
THREAD QUANTITY PER INCH13
HARDNESS RATING33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
800-1030-6433-504 MARKED 8Interchangeable
interchangeable cross-reference
interchangeable
MS25041-8Interchangeable
interchangeable cross-reference
interchangeable
30383-8Interchangeable
interchangeable cross-reference
interchangeable
92003-1Interchangeable
interchangeable cross-reference
interchangeable
92003TYPE1Interchangeable
interchangeable cross-reference
interchangeable
SW101-23Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 500400-20?
500400-20 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 500400-20?
There are 20 known substitutes for 500400-20: 800-1030-6433-504 MARKED 8, MS25041-8, 30383-8 and 17 more. Substitute compatibility should be verified for your specific system.
Is 500400-20 still available?
500400-20 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