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You are here: Home Tech Articles General Ford Part Numbers - Hardware and Utility Parts
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Ford Part Numbers - Hardware and Utility Parts

The information presented on this page is an 'supplement' to the How to Decipher FoMoCo Parts Numbers tutorial.


Hardware parts (fasteners, clamps, grommets, plugs, fittings and similar items) are numbered under two different systems:

 
  • Standard hardware parts have five-digit numbers (20000-99999) or low-range six-digit numbers (300000-309999) followed by a "-Sxxx" suffix to designate finish.

    Example: 45534-S8 (Grade 2 hex bolt, 3/8-16, 9/15" across flats, 1.00" threaded, 3.00" long, medium silver zinc plate)

  • Special hardware parts use six-digit numbers (350000-399999) followed by a "-Sxxx" finish suffix.

    Example: 378641-S13 (Allen-type screw, 8-32, 35/64" overall, 19/64" threaded w/nylon pellet, chrome finish)

Part Number Finish Finish Suffix
20000-24999 = Bolts
25000-31999 = Machine Screws
33000-34699 = Nuts
34700-34974 = Lock Washers
34975-34999 = Nuts
35000-39499 = Machine Screws
39500-40599 = Thread Formers
40600-41999 = Thread Cutters
42000-42639 = Tapping Screws
42640-42909 = Machine Screws
42910-43239 = Bolts
43240-43599 = Machine Screws
44700-44999 = Washers
45000-45199 = Spring Nuts
45200-45299 = Stamped Nuts
45300-45399 = Nuts
45600-49999 = Bolts
50000-51049 = Machine Screws
51050-53799 = Thread Cutters
53800-55665 = Machine Screws
55666-55859 = Nuts
55960-56099 = Tapping Screws
56100-56499 = Bolts
56900-56999 = Tapping Screws
57000-57999 = Machine Screws
58000-59999 = Bolts
60000-69999 = Rivets
72000-72199 = Cotter Pins
72200-72300 = Grooved Pins
72900-73399 = Straight Pins
73700-73799 = Taper Pins
73800-74099 = Clevis Pins
74100-74199 = Expansion Plugs
74200-74299 = Retaining Spring Clips
76000-76999 = Clevis Pins
87000-87999 = Fittings
87000-87199 = O-Rings
88350-88999 = Studs
89000-91999 = Set Screws
92000-92099 = Tapping Screws
93000-93999 = Studs
95000-95499 = Snap Studs and Snap Items
95500-95999 = Nylon Straps
97000-97199 = Clevis Pins
97200-97399 = Clamps
97400-97799 = Snap Rings
300000-300499 = Machine Screws
300500-301379 = Bolts
301380-302314 = Machine Screws
302315-305999 = Bolts
306000-306499 = Machine Screws
350000-399999 = Special Parts*
 
S = Plain
S2 = Raven (Phosphate & Oil)
S3 = Black Japan
S4 = Raven (Phosphate & Oil) and black paint
S5 = Copper plate
S6 = Nickel Plate
S7 = Cadmium plate
S8 = Zinc plate
S7-8 = Cadmium-Zinc
S9 = Zinc plate (Bright)
S10 = Tinned
S11 = Copper Coat
S12 = Lacquer to match trim
S13 = Chrome plated (Interior Parts)
S14 = Nickel plate - Butler finish
S15 = Black Oxidized
S16 = Lead plate
S18 = Case hardened
S20 = Cement Coat
S21 = Lacquer for identification
S23 = Rustless (Stainless) steel - head polished
S26 = Cadmium or zinc plate and enamel
S27 = Screw blank
S28 = Sterile coating
Following finishes offer additional corrosion resistance:
S32 = Black paint or zinc chromate primer
S34 = Case hardened cadmium finish
S35 = Zinc coat
S36 = Zinc plate and Dichromate
S37 = Chrome plated (Exterior Parts)
S38 = Raven finish
S39 = Cadmium plate
S40 = Zinc plate
S41 = Pre-galvainized coat
S42 = Cadmium plate (Black)
S43 = Zinc plate plus O.D. Chromate
S45 = Chrome plate on Stainless
S46 = Black Phenolic
S47 = Chromium plate
S48 = Cadmium/Tin plate
S49 = Black Epoxy
S50 = Cadmium plate & Blue Chromate
S51 = Cadmium plate & Blue Chromate
S91 = O-Ring material
S92 = O-Ring material
S93 = O-Ring material
S94 = O-Ring material
S100 = Special
S101 = Special
S102 = Special
S103 = Special
S104 = Special
 
B = Black dye

M = Non-electrolytic plating (Mechanically applied)

X = Wax sealer (used to finish screw threads)
 

* Special Parts were assigned one-up numbers starting in 1944, and thus defy easy categorization.
     For the definitive book on 1955-73 Ford Hardware identification, order the AMK Products Guide to Ford Fasteners, which covers more than 10,000 items in a far more readable fashion than Ford's own randomly organized Standard and Utility Parts Catalogs.
     Max Kotlowski's guide also provides photos of each fastener and correct markings, painfully detailed descriptions of every available finish, re-finishing instructions for most common finishes and all the measurements you'd need to purchase over-the counter replacement fasteners. Many exact, correctly-marked replacements are also available from AMK, either individually or as part of their wide array of fastener kits.
 

These tables are by no means all-inclusive, and I would gladly welcome your comments or corrections. Please e-mail me at admin@fordification.com.



 

 
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