IBS, INCORPORATED IBS, INCORPORATED Index Washers, Lock Washers Alloy C-8 External Tooth C-10 High Collar C-8 A Internal Tooth C-10 Medium C-8 Assortments Sur-Lock Washers C-6 Flat Washer General Information C-7 Copper C-11 Fender Washer C-9 Heavy Duty C-5 Lock Washer Internal & External Star Washer C-10 Sur-Lock Vibration-Resistant Washers C-7 B Back-Up Washers Aluminum Round C-10 W F W Fasteners Washers, Flat A Copper C-11 A Fender C-9 S Finishing C-10 S Heat Treated SAE C-3 Heat Treated USS C-4 H Heavy Duty C-5 H Hi-Alloy C-2 E Washers, Lock E Alloy C-8 High Collar C-8 R Internal & External Tooth C-10 R Medium C-8 S Sur-Lock Washers C-6 S G Gaskets Drain Plug C-11 W Washers, Flat Copper C-11 Fender C-9 Finishing C-10 Heat Treated, SAE - Plain & Plated C-3, C-4 Heavy Duty C-5 High-Alloy C-2 Standard USS C-4 PB 09-09-19 09-09-19 C-1 The Mark of Our Quality is in Our Service The Mark of Our Quality is in Our Service IBS, INCORPORATED IBS, INCORPORATED High-Alloy Tension Washer C01 SAE Flat Washers HT C02 & Std C05 High-Alloy Washers • Thicker than standard washers to prevent cupping and dishing and to assure a consistent clamp load. • Special high-alloy hardened material minimizes crushing of bearing surfaces. • Zinc Yellow Per ASTM B633 plated to resist corrosion & assist torquing. • Heat treated to Rockwell "C" 40-45. • Provides smooth bearing surfaces and uniform load distribution to reduce brinnelling. SAE HIGH-ALLOY FLAT WASHERS USS HIGH-ALLOY FLAT WASHERS IBS IBS Size I.D. O.D. Thick Qty Size I.D. O.D. Thick Qty No. No. 7400 1/4 9/32 5/8 .056 / .071 100 7016 1/4 17/64 3/4 .065 / .080 100 W 7401 5/16 11/32 11/16 .056 / .071 100 7017 5/16 21/64 7/8 .079 / .093 100 7402 3/8 13/32 13/16 .090 / .112 100 7018 3/8 25/64 1 .079 / .093 100 W A 7403 7/16 15/32 59/64 .090 / .112 50 7019 7/16 29/64 1-1/4 .090 / .106 50 A 7404 1/2 17/32 1-1/16 .090 / .112 50 7020 1/2 17/32 1-3/8 .122 / .146 50 S 7405 9/16 19/32 1-11/64 .090 / .112 25 7021 9/16 19/32 1-1/2 .122 / .146 25 S 7406 5/8 21/32 1-5/16 .146 / .174 25 7022 5/8 41/64 1-3/4 .136 / .160 25 H 7407 3/4 13/16 1-15/32 .146 / .174 20 7023 3/4 25/32 2 .136 / .160 20 H 7408 7/8 15/16 1-3/4 .146 / .174 15 7024 7/8 57/64 2-1/4 .136 / .160 15 E 7409 1 1-1/16 2 .146 / .174 10 7025 1 1-3/32 2-1/2 .136 / .160 10 E THE HIGH-ALLOY FASTENING SYSTEM IS DESIGNED AND MANUFACTURED TO BE USED R AS A SYSTEM. NO SUBSTITUTIONS OR ALTERATIONS ARE TO BE MADE OF THE BOLT, R NUT, WASHER OR FINISH. S S C-2 09-09-19 09-09-19 C-3 The Mark of Our Quality is in Our Service The Mark of Our Quality is in Our Service IBS, INCORPORATED IBS, INCORPORATED SAE Flat Washers HT C02 & Std C05 Heat Treated SAE Flat Washers • Meets S.A.E. close tolerance specifications. • Eliminates common washer failures such as dishing, bellying or cracking. • Through hardened (quenched & tempered) to R/C 38-45. • Made of heat treated alloy. • Controlled ductility to eliminate cracking and splitting. • Maximum strength for use with all grades of cap screws. • Plated washers are Zinc (Standard) and Yellow Baked (Heat Treated). HEAT TREATED SAE FLAT WASHERS (C02) IBS No. Zinc Yellow Size I.D. O.D. Thick Qty Plain Plated 7000 2660 1/4 5/16 5/8 1/16 200 7001 2661 5/16 3/8 11/16 1/16 100 7002 2662 3/8 13/32 13/16 1/16 100 W 7003 2663 7/16 15/32 15/16 1/16 100 W 7004 2664 1/2 17/32 1-1/16 7/64 100 A 7005 2665 9/16 19/32 1-3/16 7/64 100 A 7006 2666 5/8 21/32 1-5/16 7/64 100 S 7007 2667 3/4 13/16 1-1/2 9/64 50 S 7008 2668 7/8 15/16 1-3/4 9/64 25 H 7009 2669 1 1-1/16 2 9/64 25 H 7010 — 1-1/8 1-1/4 2-1/4 9/64 EA E 7011 — 1-1/4 1-3/8 2-1/2 9/64 EA E 7013 — 1-1/2 1-5/8 3 9/64 EA R R STANDARD SAE FLAT WASHERS (C05) S IBS No. Size I.D. O.D. Thick Qty S Zinc Plated 7044 #4 3/32 9/32 3/64 100 7045 #6 1/8 3/8 3/64 100 7046 #8 3/16 15/32 3/64 100 7047 #10 7/32 1/2 3/64 100 7048 #12 1/4 9/16 3/64 100 7049 1/4 9/32 5/8 1/16 200 7050 5/16 11/32 11/16 1/16 100 7051 3/8 13/32 13/16 1/16 100 7052 7/16 7/16 15/16 1/16 100 7053 1/2 1/2 1-1/16 3/32 100 7054 9/16 9/16 1-3/16 3/32 100 7055 5/8 5/8 1-5/16 3/32 100 7056 3/4 3/4 1-1/2 9/64 50 7057 7/8 7/8 1-3/4 9/64 25 7058 1 1 2 9/64 25 C-2 09-09-19 09-09-19 C-3 The Mark of Our Quality is in Our Service The Mark of Our Quality is in Our Service IBS, INCORPORATED IBS, INCORPORATED USS Flat Washers HT C04 & Std C06 Heat Treated Flat USS Washers • U.S. Standard dimensions for applications requiring extra bearing surface in oversize or slotted holes for high strength applications. • Eliminates common washer failures such as dishing, bellying or cracking. • Through hardened (quenched & tempered) to R/C 38-45. • Made of heat treated alloy. • Controlled ductility to eliminate cracking and splitting. • Maximum strength for use with all grades of cap screws. • Plated washers are Zinc (Standard) and Yellow Baked (Heat Treated). • Certificates of compliance to ASTM Designation F-436 available on request. USS PLAIN USS ZINC YELLOW W IBS No. Size I.D. O.D. Thick Qty IBS No. Size I.D. O.D. Thick Qty W 7030 1/4" 5/16" 3/4" .066 / .072 100 2770 1/4" 5/16" 3/4" .066 / .072 100 A 7031 5/16" 3/8" 7/8" .064 / .080 100 2771 5/16" 3/8" 7/8" .064 / .080 100 A 7032 3/8" 7/16" 1" .064 / .080 100 2772 3/8" 7/16" 1" .064 / .080 100 S 7033 7/16" 1/2" 1-1/4" .064 / .080 100 2773 7/16" 1/2" 1-1/4" .064 / .080 100 S 7034 1/2" 9/16" 1-3/8" .097 / .121 100 2774 1/2" 9/16" 1-3/8" .097 / .121 100 H 7035 9/16" 5/8" 1-1/2" .097 / .121 50 2775 9/16" 5/8" 1-1/2" .097 / .121 50 H 7036 5/8" 11/16" 1-3/4" .122 / .146 50 2776 5/8" 11/16" 1-3/4" .122 / .146 50 E 7037 3/4" 13/16" 2" .122 / .146 50 2777 3/4" 13/16" 2" .122 / .146 50 E 7038 7/8" 15/16" 2-1/4" .136 / .160 25 2778 7/8" 15/16" 2-1/4" .136 / .160 25 R 7039 1" 1-1/16" 2-1/2" .136 / .160 25 2779 1" 1-1/16" 2-1/2" .136 / .160 25 R S S Standard Flat Washers USS (Zinc Plated) IBS No. Size I.D. O.D. Thick Qty IBS No. Size I.D. O.D. Thick Qty 7063 1/4" 5/16" 3/4" 1/16" 200 7070 3/4" 13/16" 2" 5/32" 25 7064 5/16" 3/8" 7/8" 5/64" 100 7071 7/8" 15/16" 2-1/4" 11/64" 25 7065 3/8" 7/16" 1" 5/64" 100 7072 1" 1-1/16" 2-1/2" 11/64" 25 7066 7/16" 1/2" 1-1/4" 5/64" 100 7073 1-1/8" 1-1/4" 2-3/4" 13/16" EA 7067 1/2" 9/16" 1-3/8" 7/64" 100 7074 1-1/4" 1-3/8" 3" 7/32" EA 7068 9/16" 5/8" 1-1/2" 7/64" 50 7076 1-1/2" 1-5/8" 3-1/2" 7/32" EA 7069 5/8" 11/16" 1-3/4" 9/64" 50 C-4 09-09-19 09-09-19 C-5 The Mark of Our Quality is in Our Service The Mark of Our Quality is in Our Service IBS, INCORPORATED IBS, INCORPORATED Heavy Duty Flat Washers C16 Heavy Duty Flat Washers (Plain) • Heat treated to Rockwell 38-45. • Through hardened (quenched and tempered). • For use with High-Alloy or Grade 8 capscrews.