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Technical Data Sheet
PartsTable / COMPONENT / 21376 FIND 23
21376 FIND 23 ✓ 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 BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: BEVEL-CONICAL, head_height: 0.500 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN, thread_length: 1.250 INCHES MINIMUM 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 5306-01-616-3855, 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
21376 FIND 23
NSN: 5306-01-616-3855
FSC: 5306
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleBEVEL-CONICAL
head_height0.500 INCHES NOMINAL IN
thread_class3A A
head_diameter0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
thread_length1.250 INCHES MINIMUM IN
surface_finish125.0 MICROINCHES OVERALL
fastener_length5.1875 INCHES NOMINAL IN
hardness_rating34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
special_featuresBOLT IS ALTERED FROM MS20008H(NASM20004 THRU 20024);BOLT HAS DRILLED HEAD AND A LONGER MINIMUM THREAD LENGTH THAN IS CALLED OUT IN THE NAS STANDARD
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
NSN5306-01-616-3855
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21376 FIND 23 · 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 DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD QUANTITY PER INCH: 20
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
WIDTH ACROSS FLATS: 0.3755 INCHES MINIMUM AND 0.3785 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: HEXAGON
•
FASTENER LENGTH: 5.1875 INCHES NOMINAL IN
•
HEAD DIAMETER: 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
THREAD QUANTITY PER INCH20
NOMINAL THREAD DIAMETER0.500 INCHES IN
WIDTH ACROSS FLATS0.3755 INCHES MINIMUM AND 0.3785 INCHES MAXIMUM IN
INTERNAL DRIVE STYLEHEXAGON
FASTENER LENGTH5.1875 INCHES NOMINAL IN
HEAD DIAMETER0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONVALVE ASSY
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
MS20008-10Upgraded Successor
successor cross-reference
successor
02-0067-8-23Upgraded Successor
successor cross-reference
successor
6515NCM020050Upgraded Successor
successor cross-reference
successor
02-0067Upgraded Successor
successor cross-reference
successor
5120-030-060Upgraded Successor
successor cross-reference
successor
23100 FIND NO 33Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21376 FIND 23?
21376 FIND 23 is a BOLT,INTERNAL WRENCHING.
What parts can replace 21376 FIND 23?
There are 22 known substitutes for 21376 FIND 23: MS20008-10, 02-0067-8-23, 6515NCM020050 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21376 FIND 23?
21376 FIND 23 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-616-3855. 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