King Pins

Wallace Forge has been manufacturing quality King Pins for tractor trailers since 1980. All our King Pins are 100% American made and individually checked to insure the highest quality. Forged out of an AISI 8630 or 4320 material, depending on the model, Wallace Forge’s Kin Pins conform to all SAE and AAR standards. Every one of our King Pins is 100% Brinell hardness checked, magnetic particle inspected and weldable.

A Style King Pins

  2084192
  • Made from 8630 Alloy Steel 
  • Available in 4320H Steel

These King Pins are also known as Mushroom King Pins. Minimum order for 4320H Steel 100 King Pins.


Part # Model Dimensions
Wt.
A B C
2084192 KP-25-A 0.38" 0.25" 1.289" 2.755"  3.305"  14
2084193 KP-31-A
0.38"
0.31"
1.289"
2.755"  3.305"  14
2084194 KP-38-A
0.38"
0.38"
1.289"
2.755"  3.305"  14
2084195 KP-50-A
0.38"
0.5"
1.289"
2.755"  3.305"  14
2084197 KP-62-A 0.38" 0.625" 1.289"  2.755"  3.305"  15
2084196 KP-75-A
0.38"
0.75" 1.289" 2.755" 3.305" 15

Drilled A Style King Pins

2084192H
  • Forged out of 8630 Alloy Steel
  • Available in 4320H Steel

All of the below King Pins have eight 0.53 inch drilled holes spaced on a 6.75 inch diameter. If you require different sized drilled holes, please specify on purchase order. Minimum order for 4320H Steel 100 King Pins.


Part # Model Dimensions
Wt.
A B C
2084192H KP-25-A Drilled 0.38" 0.25" 1.289" 2.755"  3.305"  13
2084193H KP-31-A Drilled
0.38"
0.31"
1.289"
2.755"  3.305"  13
2084194H KP-38-A Drilled
0.38"
0.38"
1.289"
2.755"  3.305"  14
2084195H KP-50-A Drilled
0.38"
0.5"
1.289"
2.755"  3.305"  14
2084197H KP-62-A Drilled 0.38" 0.625" 1.289"  2.755"  3.305"  14
2084196H KP-75-A Drilled
0.38"
0.75" 1.289" 2.755"  3.305"  14

B & C Style King Pins

2085196
  • Forged out of 8630 Alloy Steel
  • Available in 4320H Steel

These King Pins are also known as Double Spool King Pins. Minimum order for 4320H Steel 100 King Pins.


Part # Model Dimensions
Wt.
A B C
2085196 KP-25-B 2.125" 0.25" 2.875" 19
2085197 KP-31-B
2.125"
0.31"
2.875"
19
2085198 KP-38-B
2.125"
0.38"
2.875"
19
2085199 KP-50-B
2.125"
0.5"
2.875"
19
2085200 KP-25-C 1.5" 0.25" 2" 17
2085201 KP-31-C
1.5"
0.31" 2"
17
2085202 KP-38-C
1.5"
0.38" 2" 17
2085203 KP-50-C
1.5"
0.5" 2" 17

3 1/2" Heavy Duty King Pins

23931622393162D
  • Forged out of 8630 Alloy Steel
  • Heat-Treated to Brinell 302-363

These King Pins are are for off the road equipment and heavy duty trucks. Drilled models feature four 1.25 inch holes on a diameter of 8.5 inch.


Part # Model Bolster Plate Thickness Wt.
2393162 KP 848-38
0.38" 43
2394163 KP 848-50
0.50" 43
2393162D KP 848-38 Drilled
0.38" 42
2394163D KP 848-50 Drilled
0.50" 42

King Pin Locks

King Pin Lock Lunette Lock

The King Pin Lock comes with 2 keys, please specify key number. Lunette Lock does not come with lock and key.


Part # Model Description Wt.
2084164 King Pin Lock Inside Diameter 2.90", Length 3.5" 3.75

2405176 Lunette Lock Fits 2 1/2" to 3" Diameter Eye 4

Cruciform King Pins

KP-25-AAR
  • Forged out of 4320H Steel
  • Heat-Treated to Brinell 380-420

These King Pins meet all the requirements of the Association of the American Railroads, AAR, Standard M-931 when installed properly.


Part # Model Bolster Plate Thickness Dimesnsions Wt.
 A  B  C  D
2401170 KP-25-AR 0.25" 1.558" 3.012" 3.574" 2.437" 17
2402171 KP-31-AR 0.31" 1.62" 3.074" 3.636" 2.437" 17
2401172 KP-38-AR 0.38" 1.683" 3.137" 3.699" 2.437" 17
2402050 KP-25-ARM 0.25" 1.558" 3.012" 3.574" 3.125" 18
2402075 KP-31-ARM 0.31" 1.62" 3.074" 3.636" 3.125" 18
2402100
KP-38-ARM 0.38" 1.683" 3.137" 3.699" 3.125" 18
2401180 KP-25-AAR 0.25" 1.558" 3.012" 3.574" 3.625" 19
2401182 KP-31-AAR 0.31" 1.62" 3.074" 3.636" 3.625" 19
2401181 KP-38-AAR 0.38" 1.683" 3.137" 3.699" 3.625" 19
SINCE 1942, WALLACE FORGE COMPANY has proven their worth in
developing new products in the trucking industry to satisfy our customers,
and expand the industry.
Call 330-488-1203