PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 43B21912-136
43B21912-136 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.875 INCHES MINIMUM AND 1.063 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES THREADS, fastener_length: 1.188 INCHES MINIMUM AND 1.250 INCHES MAXIMUM 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 5306-00-227-0869, 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
43B21912-136
NSN: 5306-00-227-0869
FSC: 5306
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_class2A A
thread_length0.875 INCHES MINIMUM AND 1.063 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES THREADS
fastener_length1.188 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
hardness_rating80.0 ROCKWELL B MINIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentPASSIVATE OVERALL
width_between_flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
minimum_yield_strength30000 POUNDS PER SQUARE INCH LBS
NSN5306-00-227-0869
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 43B21912-136 · 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
•
FASTENER LENGTH: 1.250 INCHES NOMINAL IN
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
THREAD QUANTITY PER INCH: 18
•
WIDTH BETWEEN FLATS: 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
TEST DATA DOCUMENT: MIL-DTL-1222 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
MATERIAL: STEEL COMP 410 OR STEEL COMP 416 OVERALL
•
HEAD STYLE: HEXAGON
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH1.250 INCHES NOMINAL IN
THREAD LENGTH0.875 INCHES MINIMUM IN
THREAD QUANTITY PER INCH18
WIDTH BETWEEN FLATS0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
TEST DATA DOCUMENTMIL-DTL-1222 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MATERIALSTEEL COMP 410 OR STEEL COMP 416 OVERALL
HEAD STYLEHEXAGON
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.312 INCHES IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
M1222RN12C48GFNNUpgraded Successor
successor cross-reference
successor
MIL-S-1222Upgraded Successor
successor cross-reference
successor
MIL-DTL-1222Upgraded Successor
successor cross-reference
successor
306-40172Upgraded Successor
successor cross-reference
successor
1D4703Upgraded Successor
successor cross-reference
successor
M1222RN14C260GCNZEUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 43B21912-136?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 43B21912-136?
43B21912-136 is a BOLT,MACHINE.
What parts can replace 43B21912-136?
There are 16 known substitutes for 43B21912-136: M1222RN12C48GFNN, MIL-S-1222, MIL-DTL-1222 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 43B21912-136?
43B21912-136 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-227-0869. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 43B21912-136

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026