Standard Finishes For Tinnerman Palnut Fasteners Stamped "T" or "D"

Listed below are the most commonly used finishes available for protective coating and rust-proofing Tinnerman Palnut fasteners and components.

To specify desired finish use corresponding dash number, shown below as the last dash number, affixed to C and D based parts.

Examples: C00183-012 -27, C01053-012-4, or D98334-071M-963.

Click the image below to download the complete Standard Finishes PDF.

Finishes for "D" & "T" Stamped	Ford	GM	Daimler Chrysler	Description	Color	Benefits	SALT SPRAY
27				Soluble Oil Dipped Ferrous parts (except stainless steel) have a light coating of soluble oil applied. Non-ferrous parts are cleaned where necessary and are left in plain condition.	Natural	Low-Cost finish, recommended on ferrous parts for conditions of relatively little corrosion or for parts that are to receive a finish in the customers' plants	5% solution at 95 degrees Fahrenheit. Ferrous parts: first rust spots after 1 hour, end point (1/16" dia. rust spots) after 2-1/2 hours. Nonferrous parts: corrosion will be normal for plain finish of the material.
4	ESB-M3P4-A, ESS-MP20-A	GM4435 Code A	PS80 Plus Oil	Phosphate and Oil Parts are phosphate coated, then dipped in a special oil and spun dry	Black	Moderate corrosion resistance. Neat in appearance -will not wear off in handling.	5% solution at 95 degrees Fahrenheit. First rust spots after 32 hours. End point (1/16" dia. rust spots) after 48 hours.
1		GM4435 Code B	PS80, PS85	Phosphate Coated, then Two Coats Olive Drab Paint are applied. Each coat is properly baked to obtain maximum protection.	Olive drab.	Good corrosion resistance. Does not cause hydrogen embrittlement common with electroplated high carbon spring steel. Excellent for insulating dissimilar metals against electrolytic action.	5% solution at 95 degrees Fahrenheit. First rust spots after 48 hours. End point (1/16" dia. rust spots) after 96 hours.
67		GM4435 Code (093)		Parts are phosphate coated, and then two coats of aluminum paint are applied. Each coat is properly baked to insure maximum protection.	Aluminum color- smooth appearance	Recommended in place of cadmium plating where appearance and corrosion resistance are requirements. High in abrasion resistance and a non-conductor of electricity.	5% solution at 95 degrees Fahrenheit. First rust spots after 48 hours. End point (1/16" dia. rust spots) after 96 hours.
963	ESAM21P2-A4, WSDM21, P13-A2, A3, WSDM21P11-B1 (S301 for Non-threaded parts)	GM6173M	PS5873	Water Based zinc coating Dacromat 320 or equivalent plus clear sealer Parts are coated in a water based zinc coating for maximum protection.	Grey metallic.	Exceptional corrosion resistance. Does not cause hydrogen embrittlement	5% solution at 95 degrees Fahrenheit. End point (1/16" rust spots) after 400 hours.
NOTE: The following electroplate finishes are limited to only a few parts, such as Tubular Type clips and Tube Clamps. Please do not specify these finishes for other types of Tinnerman Palnut fasteners without the approval of our engineering department.
Finishes for "D" & "T" Stamped	Ford	GM	Daimler Chrysler	Description	Color	Benefits	SALT SPRAY
600		GM4345M Code 3MU24/0		Zinc Mechanical Plate Parts are mechanically plated from .00015" to .0003" thick. A clear chromate is applied as a sealer.	Satin Silver Color.	Excellent electrical conductivity and moderate corrosion resistance. No hydrogen embrittlement	5% solution at 95 degrees Fahrenheit. End point (red rust) after 24 hours.
3B			PS4220 Code 15	Zinc Electroplate Parts are zinc electroplated from .00015" to .0002" thick and baked to reduce hydrogen embrittlement.	Silver Color. Slight discoloration from baking may occur	Excellent electrical conductivity and moderate corrosion resistance	5% solution at 95 degrees Fahrenheit. End point (red rust) after 24 hours.
3963	WSS-M21P36-A2	GM6173	PS-5873P	Two coats of water base zinc coating (Geomet) plus one coat geomet "P" clear sealer.	Silver Color	Exceptional corrosion resistance. Does not cause hydrogen embrittlement and is free of Hexavalent Chrome	5% solution at 95 degrees Fahrenheit. End point (red rust) after 720 Hours
3255	None	None	None	Two coasts of water base zinc coating (Geomet).	Silver Color	Exceptional corrosion resistance. Does not cause hydrogen embrittlement and is free of Hexavalent Chrome	5% solution at 95 degrees Fahrenheit. End point (red rust) after 330 Hours
3252	S438 & WSS-M21P36-A3	GMW3359		Two coats of water based zinc coating (Geomet) plus two coats of Geoblack 137.	Black	Exceptional corrosion resistance. Does not cause hydrogen embrittlement and is free of Hexavalent Chrome	5% solution at 95 degrees Fahrenheit. End point (red rust) after 480 Hours

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