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

KP-25-A

• 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	D	E
	2084192	KP-25-A	0.38"	0.25"	1.289"	2.755"	3.305"	16
	2084193	KP-31-A	0.38"	0.31"	1.289"	2.755"	3.305"	16
	2084194	KP-38-A	0.38"	0.38"	1.289"	2.755"	3.305"	16
	2084195	KP-50-A	0.38"	0.5"	1.289"	2.755"	3.305"	16
	2084197	KP-62-A	0.38"	0.625"	1.289"	2.755"	3.305"	17
	2084196	KP-75-A	0.38"	0.75"	1.289"	2.755"	3.305"	17

Drilled A Style King Pins

KP-25-A Drilled

• 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	D	E
	2084192H	KP-25-A Drilled	0.38"	0.25"	1.289"	2.755"	3.305"	15
	2084193H	KP-31-A Drilled	0.38"	0.31"	1.289"	2.755"	3.305"	15
	2084194H	KP-38-A Drilled	0.38"	0.38"	1.289"	2.755"	3.305"	16
	2084195H	KP-50-A Drilled	0.38"	0.5"	1.289"	2.755"	3.305"	16
	2084197H	KP-62-A Drilled	0.38"	0.625"	1.289"	2.755"	3.305"	17
	2084196H	KP-75-A Drilled	0.38"	0.75"	1.289"	2.755"	3.305"	17

 

B & C Style King Pins

KP-25-B

• 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

KP-848-38 KP-848-38 Drilled

• 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