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10-21673 — SHACKLE

✓ Government record, cited
3M · NUT WASHER
PRODUCT OVERVIEW

10-21673: SHACKLE.

The SHACKLE is a 3M industrial component. Key specifications include material: STEEL, style_designator: ANCHOR, end_item_identification: 5420-01-700-8027, part_name_assigned_by_controlling_agency: 12.5 T SP SLING SHK. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-485-8600, 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
10-21673
NSN: 5310-00-485-8600
NIINs: 004858600, 017144073
FSC: 5310 — Nuts and Washers
CAGE: 59501 — UNISON INDUSTRIES LLC (USA)
SPECIFICATIONS
materialSTEEL
style_designatorANCHOR
end_item_identification5420-01-700-8027
part_name_assigned_by_controlling_agency12.5 T SP SLING SHK
NSN5310-00-485-8600
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10-21673 · 3M ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL DIAMETER: 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.200 INCHES MINIMUM AND 0.206 INCHES MAXIMUM IN
•
THICKNESS: 0.031 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL CORROSION RESISTING OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.200 INCHES MINIMUM AND 0.206 INCHES MAXIMUM IN
THICKNESS0.031 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
W1227Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
10-2-21673Reference document
Same NSN cross-reference
Reference document — Secondary reference
59538Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10-21673?
10-21673 is a SHACKLE manufactured by 3M.
What parts can replace 10-21673?
There are 3 known substitutes for 10-21673: W1227, 10-2-21673, 59538. Substitute compatibility should be verified for your specific system.
What is the NSN for 10-21673?
10-21673 is cataloged in the U.S. Government catalog under NSN 5310-00-485-8600. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.