Yardley® Standardized Molded-In Inserts
Threaded Inserts Designed for
Molding in Plastics, Rubber and Ceramics
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Type A

Advantages

  • Class II threads meet A.S.M.E. (U.S.) specifications
  • Metric threads meet ISO specifications
  • Holes tapped to maximum depth for overall length
  • Holes burnished after tapping
  • For use with or without locating pins

Available from stock in Brass, Aluminum and Stainless Steel

Custom sizes/materials available
 

U.S. Part Number Metric Part Number A
U.S. Thread Size		 A
Metric Thread Size		 B
Diameter Over Knurl		 C
Length +.000 -.010		 D
U.S. I.D. Tolerance +.0015 -.0000 after tapping		 D
Metric I.D. (Inches) +.0015 -.0000 after tapping		 E
U.S. Minimum Number of Full Threads		 E
Metric Minimum Number of Full Threads
256A4-6¹ 2004A4-6¹ 2-56 M2.0 X 0.4 .133 .187 .070 .064 5 5-1/2
440A5-8 3005A5-8 4-40 M3.0 X 0.5 .169 .250 .089 .100 5 7-1/2
540A6-9²   5-40   .200 .281 .104   6  
632A6-10 3506A6-10 6-32 M3.5 X 0.6 .200 .312 .110 .117 5-1/2 7
832A7-11 4007A7-11 8-32 M4.0 X 0.7 .232 .344 .136 .133 6 6-1/2
832A7-16³ 4007A7-16³ 8-32 M4.0 X 0.7 .232 .500 .136 .133 10-1/2 11
1024A8-12   10-24   .266 .375 .154   4-1/2  
1032A8-12 5008A8-12 10-32 M5.0 X 0.8 .266 .375 .161 .168 6-3/4 6-1/2
25020A12-18 6010A12-18 1/4-20 M6.0 X 1.0 .391 .562 .204* .200* 6-1/2 8-1/2
25028A12-18³   1/4-28   .391 .562 .215*   10  
31218A16-21³ 80125A16-21³ 5/16-18 M8.0 X 1.25 .516 .656 .261** .267** 6-3/4 7-1/2
37516A18-24³ 10015A18-24³ 3/8-16 M10.0 X 1.50 .578 .750 .318** .337** 7 7
50013A24-30³ 120175A24-30³ 1/2-13 M12.0 X 1.75 .766 .937 .430** .404** 6-1/2 7

Materials: (1) Brass and Stainless Steel only (2) Aluminum and Brass Only (3) Brass Only
Tolerances: * +.002 -.000 after tapping **Check with our engineering department for tolerances

Hole Preparation Guidelines

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