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LAC–024–2MD

ALA Floating Self-Clinching Fasteners · Unified · PDF page 13 · PEM Fastener Catalogue

ALA Floating Self-Clinching Fasteners · Unified · thread .190-24 (#10-24)

Self-locking, 300 series stainless, Passivated retainer · black dry-film lubricant nut.

Also written as LAC-024-2MD.

Part number breakdown

SegmentCodeMeaning
TypeLASelf-locking
Retainer Material CodeC300 series stainless
Thread024Thread size .190-24 (#10-24)
Shank2—
Finish CodeMDPassivated retainer · black dry-film lubricant nut

Dimensions

Defines A, C, D, T2. Technical cross-section diagram of a clinching fastener with the following dimensional labels: A: Thickness of the clinching base/flange. C: Outer diameter of the base. D: Outer diameter of the body/housing. T₂: Length/depth of the threaded internal component. Key Features: Internal threads, multi-piece assembly, and cross-hatched sections indicating a metal component.Defines E. Subject: Technical engineering diagram of a circular component, likely a tube or pipe end. Key Features: Dimension E: Represents the total outer diameter of the assembly. Concentric/Eccentric Rings: Shows multiple circular layers, with an arrow pointing to an internal feature or "Formed" area. Centerlines: Horizontal and vertical dashed lines indicate symmetry and axial center. Line Styles: Uses solid lines for visible edges and dashed lines for hidden features or internal diameters.Defines float. Technical diagram showing a top-down view of a mechanical component: Central feature: A circular opening housed within a square element. Housing: Outer concentric circles with a serrated or threaded ring detail. Float specification: An orange arrow points to the internal square, corresponding to text indicating a float of .015”/0.38 mm minimum in all directions from the center (.030”/0.76 mm total. Alignment: Horizontal and vertical centerlines intersect at the midpoint of the component.
DimensionValue
Thread Size.190-24 (#10-24)
Type – Self-Locking (Fastener Material) › 300 Series StainlessLAC
Thread Code024
Shank Code2 (1)
A (Shank) Max..054
Min. Sheet Thickness.054
Hole Size in Sheet +.003 −.000.406
C Max..405
D Max..405
E ±.015.470
T1 Max..170
T2 Max..270
Min. Dist. Hole ℄ To Edge.36

(1) This shank code is not available for A4 and LA4 nuts.

Material and finish

PropertyValue
TypeLAC
Fastener MaterialsThreads › Self-locking › Internal, UNJ Class 3B per ASME B1.15 / MJ Class 4H6H per ASME B1.21M (M6 thread 4H5H); Retainer › 300 Series Stainless Steel; Nut › 300 Series Stainless Steel
Standard FinishesSelf-locking › Retainer › Passivated and/or tested per ASTM A380; Self-locking › Nut › Black Dry-film Lubricant
For Use In Sheet HardnessHRB 70 / HB 125 or Less

Source: Material and Finish Specifications · PDF page 13

Single groove identifies A4/LA4 for stainless sheets. PEM® Double Squares: Registered trademark feature located on the top inner rim of the fastener. PEM® Single groove: Registered trademark feature on the outer side wall; identifies products for installation into stainless steel sheets (A4 and LA4 types. Fastener Type: Circular threaded insert with a knurled base and specialized identifying marks.The image displays four types of circular aerospace fasteners: AC/AS: Standard non-locking fastener. LAC/LAS: Locking fastener with a dark-colored insert. LA4: Locking thread version with a dark insert. A4: Non-locking thread version.

Source

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Part number breakdownDimensionsMaterial and finishRelated drawingsSource