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MATERIAL: Nut and spherical washer: A286 per AMS5525, AMS5732, AMS5737.

HARDNESS: ROCKWELL 49 maximum.

FINISH: Dry Film Lubricant. Optional Dry Film Lubricant on nut retaining cage and spherical washer.

PERFORMANCE: In accordance with NASM25027.

THREADS: In accordance with AS8879 before lubrication.

FLOATABILITY: .025 radially from center.

MISALIGNMENT: 8° in any direction from centered position.

VARIATION: Add « K » for bottom c’sunk rivet holes, for example: LAONM53MK.

APPLICATION: Type LAONM nuts are two lug, self aligning anchor nuts designed for use in shear or tensile applications involving temperatures up to 450° F. The LAONM features a self aligning design which qualifies it for use in applications involving not only radial but vertical misalignment of bolts at assembly to the limitations designed. Added advantages areas also provided in weight and stock savings on shims and bolts due to the flexibility in thread length provided by the counterbore to permit use of either full or shear thread length bolts.

Contact Howmet for the diameter/type in manufacturing.
Unit of Measure

A - MAX

 N/A 1.265 Inch

B - MAX

 N/A 0.562 Inch

C ±.005

 N/A 0.500 Inch

D - MIN

 N/A 0.254 Inch

H - MAX

 N/A 0.406 Inch

J ±.002

 N/A 1.000 Inch

K +.005 / +.000

 N/A 0.098 Inch

L - MIN

 N/A 0.141 Inch

P - MIN

 N/A 0.311 Inch

R - MIN

 N/A 0.100 Inch

V - REF

 N/A 0.031 Inch

Ultimate Tensile Strength

 N/A 4580.000 lb/min

Approx. Weight

 N/A 1.480 lb/100

Thread Type

 N/A Unified

Configuration 1

 N/A Two Lug

Configuration 2

 N/A Floating

Configuration 3

 N/A Self-Aligning

Lock

 N/A Crimp Lock

Simplified Material

 N/A CRES

Temperature

 N/A 450°F - 235°C

Specific Material

 N/A Nut and spherical washer: A286 per AMS5525, AMS5732, AMS5737

Thread

 N/A 0.2500-28 UNJF-3B