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3/8 USS Flat Washers (ASME B18. 22.1)
USS Flat Washers were among the first known commercial flat washers in the U.S.A. They are characterized as having a loose fit, and have a larger outside diameter than SAE Flat washers. The USS designation was derived from the name “Unified Standard Series.” At the time, coarse threaded bolts were called USS bolts.
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| Buy USS Flat Washers from one of our FCH Network Members | ||||||||
|---|---|---|---|---|---|---|---|---|
| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Ababa | CA | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss f/w hrd stl yel znc (1 od) b18.22.1 | 2060 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Yellow | 3/8 x 25 | 3/8 uss f/w 25/pkg hrd stl yel znc (1 od) b18.22.1 | 8 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss f/w trivalent hrd stl yel znc (1 od) b18.22.1 | 6807 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss f/w extra thick hrd stl yel znc (1 od) b18.22.1 | 4562 |
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| Ababa | CA | USS Flat Washer | Steel | Plain | 3/8 | 3/8 uss f/w al-2000 (black) stl (1 od) b18.22.1 | 2304 |
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| Ababa | CA | USS Flat Washer | Steel | Galvanized | 3/8-1 | 3/8 uss f/w stl hdg (1 od) b18.22.1 | 6373 |
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| Ababa | CA | USS Flat Washer | Steel | Plain | 3/8-1 | 3/8 uss f/w stl pln (1 od) b18.22.1 | 1510 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Clear | 3/8-1 | 3/8 uss f/w stl znc (1 od) b18.22.1 | 30050 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Clear | 3/8-100 | 3/8 uss f/w (100/bag) stl znc (1 od) b18.22.1 | 2491 |
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| GLF | OH | USS Flat Washer | Grade 8 | Plain | 3/8 | 3/8 uss flat gr 8 stl pln b18.22.1 () () () | 436 |
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| GLF | OH | USS Flat Washer | Grade 8 | Zinc/Yellow | 3/8 | 3/8 uss flat gr 8 stl zy b18.22.1 () () () | 18484 |
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| GLF | OH | USS Flat Washer | Nylon (Polyamide) | Plain | 3/8 | 3/8 uss flat nyl b18.22.1 () () () | 41322 |
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| GLF | OH | USS Flat Washer | Steel | Plain | 3/8 | 3/8 uss flat stl pln b18.22.1 () () () | 28015 |
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| GLF | OH | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat stl zc b18.22.1 () () () | 10972 |
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| GLF | OH | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss flat stl zn yel rohs b18.22.1 () () () | 21380 |
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| GLF | OH | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss flat stl hdg b18.22.1 () () () | 1231 |
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| GLF | OH | USS Flat Washer | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8 | 3/8 uss flat 18-8 s/s b18.22.1 () () () | 1525 |
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| GLF | OH | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss flat thru-hard stl zy domestic b18.22.1 () () () | 1910 |
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| GLF | OH | USS Flat Washer | 316, 317, A4 Stainless | Plain | 3/8 | 3/8 uss flat 316 s/s domestic b18.22.1 () () () | 100 |
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| GLF | OH | USS Flat Washer | Grade 5 | Zinc/Clear | 3/8 | 3/8 uss flat grade 5 stl zc b18.22.1 () () () | 1755 |
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| GLF | OH | USS Flat Washer | Steel | Dip-Spin, Spray-Spin Basecoat + Topcoats (Dacromet, Doerken, Geomet, Magni, etc.) | 3/8 | 3/8 uss flat thru-hard stl magni b18.22.1 () () () | 17528 |
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| Irwin Ind | Ont | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flatwasher steel zinc trivalent clear b18.22.1 | 12708 |
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| Irwin Ind | Ont | USS Flat Washer | Steel | Cadmium | 3/8 | 3/8 uss plate flatwashers cad dich to qqp 416 type 11 cl 3 b18.22.1 | 500 |
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| ASMC | IL | USS Flat Washer | Grade 8 | Zinc/Yellow | 3/8 | gr8 flat USS pattern-usa med carb b18.22.1 | 1,950 |
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| ASMC | IL | USS Flat Washer | Grade 8 | Zinc/Clear | 3/8 | gr8 flat USS pattern-usa med carb zp b18.22.1 | 2,360 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss f/w hrd stl yel znc (1 od) b18.22.1 | 500 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Yellow | 3/8 x 25 | 3/8 uss f/w 25/pkg hrd stl yel znc (1 od) b18.22.1 | 7 |
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| Ababa | CA | USS Flat Washer | Steel | Galvanized | 3/8-1 | 3/8 uss f/w stl hdg (1 od) b18.22.1 | 700 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Clear | 3/8-1 | 3/8 uss f/w stl znc (1 od) b18.22.1 | 6400 |
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| Ababa | CA | USS Flat Washer | Steel | Zinc/Clear | 3/8-100 | 3/8 uss f/w (100/bag) stl znc (1 od) b18.22.1 | 200 |
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| 3Q, Inc. | IL | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss flat washer thru-hardened 1050 steel .0002 zinc yellow b18.22.1 | 284710 |
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| GLF | OH | USS Flat Washer | Steel | Zinc/Clear | 3/8 x 1 | 3/8x1 od uss flat -low carbon-zinc-cr3 bbi# 344004 b18.22.1 | 1267 |
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| JET FITTING | CA | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss f/w stl hdg 345003 b18.22.1 | 2184 |
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| JET FITTING | CA | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss f/w stl zinc 344004 b18.22.1 | 25583 |
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| JET FITTING | CA | USS Flat Washer | Steel | Black Oxide | 3/8 x .375 | 3/8 (.375) uss flat steel black oxide 37WUSSB b18.22.1 | 6914 |
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| General F | MI | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss fw zn b18.22.1 | 30180 |
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| QFC | TX | USS Flat Washer | Steel | Plain | 3/8 | 3/8 uss flat plain each 67 .438x1.00x.083 b18.22.1 | 70 |
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| QFC | TX | USS Flat Washer | Steel | Plain | 3/8 | 3/8 uss flat plain each 67 .438x1.00x.083 b18.22.1 | 2950 |
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| QFC | TX | USS Flat Washer | Steel | Plain | 3/8 | 3/8 plain uss hard b18.22.1 | 3000 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss flat zinc yellow b18.22.1 | 1241 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss flat zinc yellow b18.22.1 | 1662 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat zinc b18.22.1 | 3220 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat zinc b18.22.1 | 15508 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat zinc b18.22.1 | 98 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss flat galvanized b18.22.1 | 3077 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss flat hdg dom. b18.22.1 | 848 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss flat hdg dom. b18.22.1 | 405 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss flat hdg dom. b18.22.1 | 2500 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 hdg uss each 64 b18.22.1 | 3242 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 hdg uss each 64 b18.22.1 | 32 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 hdg uss each 64 b18.22.1 | 2518 |
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| QFC | TX | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 hdg uss each 64 b18.22.1 | 86 |
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| QFC | TX | USS Flat Washer | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8 | 3/8 uss flat 18-8 s/s steel domestic b18.22.1 | 590 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 x .438 x 1.00 | 3/8 uss flat zinc .438x1.00x.083 b18.22.1 | 656 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 x .438 x 1.00 | 3/8 uss flat zinc .438x1.00x.083 b18.22.1 | 3250 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 x .438 x 1.00 | 3/8 uss flat zinc .438x1.00x.083 b18.22.1 | 18820 |
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| B & K FAST | PA | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 uss flat washers hd galv b18.22.1 | 142.15 |
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| B & K FAST | PA | USS Flat Washer | Grade 8 | Zinc/Clear | 3/8 | 3/8 uss thru-hard flat washers gr 8 zinc b18.22.1 | 1.45 |
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| B & K FAST | PA | USS Flat Washer | Grade 8 | Zinc/Yellow | 3/8 | 3/8 uss thru-hard flat washers gr.8 zy b18.22.1 | 76.8 |
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| B & K FAST | PA | USS Flat Washer | Steel | Plain | 3/8 | 3/8 uss flat washers plain b18.22.1 | 20.955 |
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| B & K FAST | PA | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat washers zinc b18.22.1 | 106.137 |
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| Marine Fasteners | FL | USS Flat Washer | Grade 8 | Plain | 3/8 | 3/8 uss flat thru-hardened b18.22.1 | 2200 |
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| OSSCO | RI | USS Flat Washer | Brass | Plain | 3/8 | 3/8 flat uss large od brass b18.22.1 | 5 |
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| OSSCO | RI | USS Flat Washer | Aluminum | Plain | 3/8 | 3/8 flat uss alum b18.22.1 | 12 |
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| QFC | TX | USS Flat Washer | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8 | 3/8 uss flat washer 18-8 s/s b18.22.1 | 3000 |
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| QFC | TX | USS Flat Washer | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8 | 3/8 uss flat washer 304 ss b18.22.1 | 611 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat washer zinc b18.22.1 | 44 |
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| QFC | TX | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 uss flat washer zinc/yellow b18.22.1 | 350 |
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| Bostwick | IN | USS Flat Washer | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8 x 1/8 | 3/8 uss flat washer 1/8 thk 18-8 stainless (z9217) b18.22.1 | 87 |
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| Bostwick | IN | USS Flat Washer | Aluminum | Plain | 3/8 | 3/8 uss flat washer alum b18.22.1 | 248 |
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| JET FITTING | CA | USS Flat Washer | Steel | Zinc/Clear | 3/8 x 1.00 x .100 | 3/8x1.00x.100 flat washer steel zinc plated uss b18.22.1 | 5420 |
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| JET FITTING | CA | USS Flat Washer | Steel | Galvanized | 3/8 | 3/8 washers flat washers uss steel flat washer hdg (inch) b18.22.1 | 222 |
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| Wurth | Ont | USS Flat Washer | Steel | Galvanized | 3/8 | wsh flt uss a w st (hdg) 3/8 b18.22.1 | 319 |
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| THRDFAST | FL | USS Flat Washer | Grade 8 | Zinc/Yellow | 3/8 | gr8 USS f/w z&y domestic b18.22.1 | 76 |
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| THRDFAST | OK | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | USS f/w & b18.22.1 | 2,275 |
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| THRDFAST | AL | USS Flat Washer | Grade 8 | Zinc/Clear | 3/8 | 3/8 gr 8 USS f/w b18.22.1 | 3,000 |
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| THRDFAST | AL | USS Flat Washer | Steel | Cadmium | 3/8 | USS f/w domestic b18.22.1 | 94 |
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| KBS | TN | USS Flat Washer | Steel | Zinc/Clear | 3/8 | 3/8 uss flat/w plated b18.22.1 | 11,088 |
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| KBS | TN | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 !hardened! uss flat/w .098min thick yellowznc b18.22.1 | 47,060 |
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| KBS | TN | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 !hardened! uss flat/w mc2 .090thick yellowznc b18.22.1 | 9,750 |
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| THRDFAST | AL | USS Flat Washer | Steel | Galvanized | 3/8 | USS f/w mech b18.22.1 | 78761 |
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| THRDFAST | MS | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | USS f/w z&y domestic b18.22.1 | 40 |
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| THRDFAST | OK | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | USS f/w z&y domestic b18.22.1 | 2 |
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| THRDFAST | OK | USS Flat Washer | Steel | Cadmium | 3/8 | USS f/w b18.22.1 | 25 |
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| THRDFAST | AL | USS Flat Washer | Steel | Fluoropolymer-Based (Xylan, Fluorokote, Teflon) | 3/8 | USS f/w teflon blue b18.22.1 | 1058 |
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| WSB | KY | USS Flat Washer | Steel | Galvanized | 3/8 | washer flat uss a w st (hdg) 3/8 b18.22.1 | 66,804 |
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| MMF | MI | USS Flat Washer | Steel | Plain | 3/8 | 3/8 hard uss flat washer zdy usa domestic b18.22.1 | 3600 |
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| MMF | MI | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 hard uss flat washer zinc yellow usa domestic b18.22.1 | 3600 |
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| MMF | MI | USS Flat Washer | Steel | Plain | 3/8 | 3/8 hard uss flat washer zdy usa domestic b18.22.1 | 3600 |
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| MMF | MI | USS Flat Washer | Steel | Zinc/Yellow | 3/8 | 3/8 hard uss flat washer zinc yellow usa domestic b18.22.1 | 3600 |
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| Davis | IL | USS Flat Washer | Steel | Zinc/Black | 3/8 | 3/8 uss flat washer-steel black zinc b18.22.1 | 1,500 |
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