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Technical Data Sheet
PartsTable / COMPONENT / 21-9500
21-9500 ✓ 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 OVERALL, head_style: HEXAGON, head_height: 0.609 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 2.062 INCHES MINIMUM IN, fastener_length: 2.250 INCHES NOMINAL 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 5305-00-297-0725, 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
21-9500
NSN: 5305-00-297-0725
FSC: 5305
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.609 INCHES NOMINAL IN
thread_class2A A
thread_length2.062 INCHES MINIMUM IN
fastener_length2.250 INCHES NOMINAL IN
hardness_rating19.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND ZINC OVERALL
width_between_flats1.500 INCHES NOMINAL IN
nominal_thread_diameter1.000 INCHES IN
minimum_tensile_strength110000 POUNDS PER SQUARE INCH LBS
NSN5305-00-297-0725
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21-9500 · 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
•
WIDTH BETWEEN FLATS: 1.500 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 14
•
HARDNESS RATING: 19.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM AND ZINC OVERALL
•
THREAD SERIES DESIGNATOR: UNS
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS1.500 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH14
HARDNESS RATING19.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM AND ZINC OVERALL
THREAD SERIES DESIGNATORUNS
HEAD STYLEHEXAGON
FASTENER LENGTH2.250 INCHES NOMINAL IN
THREAD LENGTH2.062 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
2149-1Interchangeable
interchangeable cross-reference
interchangeable
59554-1Interchangeable
interchangeable cross-reference
interchangeable
1085820Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21-9500?
21-9500 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 21-9500?
There are 3 known substitutes for 21-9500: 2149-1, 59554-1, 1085820. Substitute compatibility should be verified for your specific system.
What is the NSN for 21-9500?
21-9500 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-297-0725. 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