1
410 Henderson, KY 270-830-0077 Owensboro, KY 270-684-0877 Mt. Vernon, IL 618-244-7156 Henderson, KY 270-830-0077 Owensboro, KY 270-684-0877 Mt. Vernon, IL 618-244-7156 Henderson, KY 270-830-0077 Owensboro, KY 270-684-0877 Mt. Vernon, IL 618-244-7156 Mechanical Specifications for Externally Threaded Fasteners with Grade Markings Specification Material Size Min. Proof Min. Tensile Core Hardness Min. Yield Grade Range Strength Strength Rockwell Strength Identification (Inches) (psi) (psi) Min. Max. (psi) Marking SAE J429-Grade 1 Low or Medium 1/4 - 1-1/2 33,000 60,000 B70 B100 36,000 Carbon SAE J429-Grade 2 Steel 1/4 - 3/4 55,000 74,000 B80 B100 57,000 7/8 - 1-1/2 33,000 60,000 B70 B100 36,000 0 0 1 B 9 6 B 0 0 0 , 0 6 4 - 4 / 1 m u i d e M r o w o L A e d a r G - 7 0 3 A M T S A Carbon (see note 1) Steel 5 9 B 9 6 B ) n i m ( 0 0 0 , 0 6 4 - 4 / 1 m u i d e M r o w o L B e d a r G - 7 0 3 A M T S A ) x a m ( 0 0 0 , 0 0 1 n o b r a C (see note 1) Steel SAE J429-Grade 5 Medium Carbon 1/4-1 85,000 120,000 C25 C34 92,000 ASTM A449-Type 1 Steel: Quenched 1-1/8 - 1-1/2 74,000 105,000 C19 C30 81,000 0 0 0 , 8 5 0 0 0 , 0 9 0 0 0 , 5 5 3 - 4 / 3 - 1 d e r e p m e T d n a 1 e p y T - 9 4 4 A M T S A See Note 2 ASTM A325-Type 1 Medium Carbon 1/2-1 85,000 120,000 C25 C34 92,000 Steel: Quenched 1-1/8 - 1-1/2 74,000 105,000 C19 C30 81,000 & Tempered (see note 3) ASTM A354 Medium Carbon 1/4 - 2-1/2 105,000 125,000 C26 C36 109,000 Grade BC Alloy Steel: over 2-1/2 - 4 95,000 115,000 C22 C33 99,000 Quenched & Tempered (see note 2) ASTM A354 Medium Carbon 1/4 - 2-1/2 120,000 150,000 C33 C39 130,000 Grade BD Alloy Steel: over 2-1/2 - 4 105,000 140,000 C31 C39 115,000 Quenched (see note 2) & Tempered SAE J429 Grade 8 Medium Carbon 1/4 - 1-1/2 120,000 150,000 C33 C39 130,000 Alloy Steel: Quenched & Tempered SAE J429-Grade 8.2 Low Carbon 1/4 - 1 120,000 150,000 C33 C39 130,000 Boron Steel: Quenched & Tempered ASTM A490-Type 1 Medium Carbon 1/2 - 1-1/2 120,000 150,000(min) C33 C38 130,000 ( ) x a m ( 0 0 0 , 0 7 1 : l e e t S y o l l A see note 3) Quenched & Tempered ASTM A574 Low Alloy Steel: #0 - 1/2 140,000 180,000 C39 C45 Socket Head Cap Screw Quenched over 1/2 - 2 135,000 170,000 C37 C45 & Tempered Note 1: No minimum hardness is required on bolts and studs 3 times the diameter and longer. Note 2: Bolts less than 3 times the diameter in length and studs less than 4 times diameter in length shall have hardness values not less than minimum and not more than maximum. Note 3: Bolts 3 times the diameter in length and over are not required to meet minimum hardness requirements. Note 4: ASTM A354-Grade BD shall be marked with the grade symbol “BD” and, in addition may be marked with six radial lines. Note 5: Radial line markings 120 degrees apart are optional. (1) “Recommended” denotes a commercially available nut having the most suitable mechanical properties that will make it possible to obtain the desired bolt load. (2) “Suitable” denotes SAE J995 nuts having mechanical properties that will also make it possible to obtain the desired bolt load. ASTM A36 Material Specification ) i s p ( h t g n e r t S d l e i Y m u m u i n i M ) i s p ( h t g n e r t S e l i s n e T l a i r e t a M n o i t a c i f i c e p S 0 0 0 , 6 3 ) . x a m ( 0 0 0 , 0 8 - ) . n i m ( 0 0 0 , 8 5 l e e t S l a r u t c u r t S n o b r a C 6 3 A M T S A Most designers and end users focus on the strength and other characteristics of the bolt or stud. Once having selected the bolt, they must choose the appropriate nut. There are two simple rules when it comes to selecting the nut: Rule #1; choose a nut specification compatible with the bolt specification. The bolt specification will usually dictate which nut specification is applicable (ASTM A193 bolts require ASTM A194 nuts). Rule #2; choose a nut whose minimum proof strength is greater than or equal to the minimum ultimate tensile strength of the bolt. This ensures us that the bolt will break in tension prior to the female and/or male threads stripping. A broken bolt is an obvious failure. It’ s loose. However, when the threads strip prior to the bolt breaking, we may not notice the failure until after the fastener is put into service. SAE J429 Bolt and Nut Compatibility ) 2 ( n o i t u t i t s b u S e l b a t i u S ) 1 ( e d a r G t u N d e d n e m m o c e R e d a r G t l o B t u N x e H 8 e d a r G r o 5 e d a r G 5 9 9 J E A S t u N x e H y v a e H r o r a l u g e R n o b r a C w o L 2 e d a r G 9 2 4 - J E A S t u N x e H 8 e d a r G 5 9 9 J E A S t u N x e H 5 e d a r G 5 9 9 J E A S 5 e d a r G 9 2 4 - J E A S t u N x e H 8 e d a r G 5 9 9 J E A S 8 e d a r G 9 2 4 - J E A S See Note 5 See Note 4 1 (866) 677-6689 www.quebecbolts.com www.quebecbolts.com
![PERFORMANCE ENGINEERINGkohler-motors.ru/sites/kohler-motors.ru/files/... · thread r.h. sae 5/8" threaded shaft 21 4 per foot tapered shaft sae 72.50[2.854] 19 . 177 [. 755] 52.50[2.067]](https://static.documents.pub/doc/80x56/5fe045e149ced86d8b4bbbd6/performance-engineeringkohler-thread-rh-sae-58-threaded-shaft-21-4-per.jpg)
