PartsTable
Technical Data Sheet
221939 ✓ 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 SHACKLE is a the manufacturer industrial component. Key specifications include color: GREEN OR BLUE, grease_type: WHEEL BEARING, special_features: SMOOTH; 17 PCT LITHIUM, minimum_dropping_point: 196.0 CELSIUS DEGC, end_item_identification: MAINTENANCE CRANE, effective_temp_range_rating: -34.0 TO 177.0 CELSIUS DEGC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-022-1939, 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
221939
NSN: 5306-00-022-1939
FSC: 5306
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
colorGREEN OR BLUE
grease_typeWHEEL BEARING
special_featuresSMOOTH; 17 PCT LITHIUM
minimum_dropping_point196.0 CELSIUS DEGC
end_item_identificationMAINTENANCE CRANE
effective_temp_range_rating-34.0 TO 177.0 CELSIUS DEGC
NSN5306-00-022-1939
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 221939 · 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
FASTENER LENGTH: 0.968 INCHES MINIMUM AND 1.032 INCHES MAXIMUM IN
THREAD DIRECTION: RIGHT-HAND
HEAD HEIGHT: 0.188 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
MINIMUM YIELD STRENGTH: 85000 POUNDS PER SQUARE INCH LBS
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
THREAD QUANTITY PER INCH: 24
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEXAGON
FASTENER LENGTH0.968 INCHES MINIMUM AND 1.032 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
HEAD HEIGHT0.188 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
MINIMUM YIELD STRENGTH85000 POUNDS PER SQUARE INCH LBS
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
THREAD QUANTITY PER INCH24
HARDNESS RATING96.0 ROCKWELL B MINIMUM AND 104.0 ROCKWELL B MAXIMUM OVERALL
LOCKING FEATUREDISTORTIONS BEARING SURFACE OF HEAD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
MS35764-1017Upgraded Successor
successor cross-reference
successor
MILB45912Upgraded Successor
successor cross-reference
successor
MS35763-1017Upgraded Successor
successor cross-reference
successor
MS35764-1048Upgraded Successor
successor cross-reference
successor
5306008165991Upgraded Successor
successor cross-reference
successor
MS35763-1048Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 221939?
221939 is a SHACKLE.
What parts can replace 221939?
There are 15 known substitutes for 221939: MS35764-1017, MILB45912, MS35763-1017 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 221939?
221939 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-022-1939. This indicates validated use in U.S. government and defense supply chains.
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