Here are some samples that don’t show up in a search for “USS”;
“Huck Pin, Truss Head, 1/4” - 10 x 1.955" , 0.062-0.625" Grip Range, Zinc Plated, Huck# MGPT-R8-10G, (1800/Box)"
“Washer, Flat, 1/2 USS, 0.5625 ID x 1.375 OD x 0.086 Thk Min, Zinc Cobalt Plt Yellow (ASTM F1941 Fe/Zn-Co 5C)”
“Washer, Flat, 5/16 USS, 0.375 ID x 0.875 OD x 0.061 Thk Min, Zinc Plt (ASTM F1941 Fe/Zn 5) Spaenaur #91-SN-ZP or Equivalent”
This is the only part that is returned;
"Factory Assembly Hardware Kit, 536-04 Filter House
(Qty 524) Bolt, Hex, 1/4 - 20 X 1.00, Gr8, TL 0.75, Zinc Dichromate Plt Yellow (Astm F1941 Fe/Zn 5c)
(Qty 8) Bolt, Hex, 1/2 - 13 X 0.50, Full Thread, SS304
(Qty 6) Bolt, Hex, 1/2 - 13 X 2.25 , TL 1.25, SS304
(Qty 8) Bolt, Hex, 5/8 - 11 X 1.50, Full Thread, SS304
(Qty 25) Screw, Hex Washer Head, Self Drilling, 12-14 X 0.75, T/3 Point, Zinc Plt (Astm F1941 Fe/Zn 5) Ucan #Thw 1234 Or Equiv
(Qty 24) Nut, Hex, Lock, N/I, 3/8 - 16, SS304
(Qty 10) Nut, Hex, Lock, N/I, 1/2 - 13, SS304
(Qty 18) Nut, Hex, 1/2 - 13, SS304
(Qty 520) Nut, Self-Retaining, 1/4 X 20, Type U, Zinc Dichromate Plt Yellow (Astm F1941 Fe/Zn 5c)Reference Only: Spaenaur #202-387-Yzp
(Qty 88) Screw, Hex Washer Head, Self Drilling, 1/4-14 X 1.00, T/3 Point, Ss410ucan #Trh 141bss Or Equiv
(Qty 3) Screw, Thread Cutting, Phillips Drive Pan Head, Type F, 10 - 32 X 0.50, Full Thread, Stainless Steel Adams # 832-1032-0050
(Qty 6) Clevis Pin, SS304, 1/2 X 1 1/2 Lg, Spaenaur # 234-024
(Qty 8) Washer, Disc Spring, 1/2, SS17-7PH, 0.512 Id X 0.130 High X 0.098 Thk, Spaenaur # 680-863
(Qty 4) Cross Hand Wheel, Plastic Tapped Thru, 1/2 – 13, Spaenaur # 135-044
(Qty 24) Screw, Shoulder, Hex Socket Head, 3/8 - 16, SS304, Tl 0.625, Shoulder Dia 0.50 X 0.625 Lg Spaenaur #364-827 Or Equivalent
(Qty 524) Washer, Flat, 1/4 Uss, 0.3125 Id X 0.625 Od X 0.050 Thk Min, Zinc Dichromate Plt Yellow (Astm F1941 Fe/Zn 5c)
(Qty 2) Washer, Flat, 3/4, SS304, 0.8125 Id X 1.875 Od X 0.109 Thk Min, Spaenaur #W-2043 Or Equivalent
(Qty 12) Washer, Flat, 1/4 , SS304, 0.266 Id X 1.000 Od X 0.062 Thk Min, Spaenaur #658-066 Or Equivalent
(Qty 24) Washer, Flat, 3/8 , SS304, 0.391 Id X 1.000 Od X 0.062 Thk Min, Spaenaur #W-2039 Or Equivalent
(Qty 8) Washer, Flat, 1/2 , SS304, 0.5625 Id X 1.25 Od X 0.078 Thk Min, Spaenaur #W-2041 Or Equivalent
(Qty 92) Washer, Flat, 1/2, SS304, 0.5625 Id X 1.50 Od X 0.078 Thk Min, Spaenaur #658-071 Or Equivalent
(Qty 8) Washer, Flat, 5/8, SS304, 0.6875 Id X 1.50 Od X 0.078 Thk Min,
(Qty 18) Washer, Flat, 3/4, SS304, 0.8125 Id X 1.875 Od X 0.109 Thk Min, Spaenaur #W-2043 Or Equivalent
(Qty 8) Washer, Lock, Helical Split, 5/8, SS304, 0.203 Wide X 0.156 Thk, Spaenaur #W-2033 Or Equivalent
(Qty 13) Nut, Weld, Double Tab, 1/4 - 20, SS304
(Qty 8) Nut, Weld, Projection, 5/8 - 11, Plain
(Qty 3) T304 Stainless Threaded Rod, 1/2" Dia., 3 Ft Lengths
(Qty 4) Single Strut Channel 1 5/8" H X 1 5/8" W Galv 12 Ga Unslotted, P/N: 999-P-1000-4ft,
(Qty 16) Hitch Pin Clip, SS302, 1/8 Spaenaur # 090-840 Or Equivalent
(Qty 16) Washer, Lock, Helical Split, 1/4, SS304, 0.109 Wide X 0.062 Thk, Spaenaur #W-2028 Or Equivalent
(Qty 8) Bolt, Hex, 1/4 - 20 X 1.00, Full Thread, SS304
(Qty 8) Bolt, Hex, 1/4-20 X 0.75, Full Thread, SS304
(Qty 4) Screw, Machine, Philips Round Head, 6 - 32 X 0.75, Full Thread, SS304 Spaenaur Or Equivalent
(Qty 4) Nut, Hex, 6 - 32, SS304, Spaenaur Or Equivalent
(Qty 16) Washer, Flat, #6 SAE, 0.1562 Id X 0.375 Od X 0.036 Thk Min, SS304 Spaenaur Or Equivalent"