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Technical Data Sheet
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20-21236 — 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 BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, fastener_length: 2.250 INCHES NOMINAL IN, nominal_thread_diameter: 0.750 INCHES IN, thread_quantity_per_inch: 10, thread_series_designator: UNIFIED NATIONAL COARSE (UNC), material_document_and_classification: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5306-00-451-9057, 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
20-21236
NSN: 5306-00-451-9057
FSC: 5306
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
fastener_length2.250 INCHES NOMINAL IN
nominal_thread_diameter0.750 INCHES IN
thread_quantity_per_inch10
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationSAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5306-00-451-9057
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20-21236 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FASTENER LENGTH: 2.250 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
•
THREAD QUANTITY PER INCH: 10
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FASTENER LENGTH2.250 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
THREAD QUANTITY PER INCH10
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
1010TInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
24PCInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
500InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
VC219InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
20023AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
RC9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-21236?
20-21236 is a BOLT,SQUARE NECK.
What parts can replace 20-21236?
There are 8 known substitutes for 20-21236: 1010T, 24PC, 500 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-21236?
20-21236 is cataloged in the Federal Logistics Information System under NSN 5306-00-451-9057. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: September 2026