P.F. Hexagon Head Bolts/Screws

Transcription

1 Metric Series-Dimensions 1. The bolts and screws will generally conform to IS : 1364, ISO 4014, ISO 4017 and DIN 931/933.. Threads will conform to class 6g of IS : 418, Coarse Series. 3. Material : Panchsheel Fasteners High grade carbon/alloy steel. 4. Heat Treatment : Property Class 10.9 or 8.8 of IS : Thread Length LT: LT1 for L < 15 LT for L > 15 to 00 LT3 for L > Screw lengths equal to or shorter than those listed in row 'LET' will be threaded to head. 7. Sizes in brackets are non-preferred standards. 8. All dimensions are in millimeters. Thread Pitch W C B H R Q Length of Thread Length Size Max Min. Max Nom. Min. Min. Range LT1 LT LT3 LFT L M M M M M M (M14) M (M18) M (M) M (M7) M (M33) M (M39) M

2 Metric Series-Physical Properties - Tightening Torques Physical Properties Property Class Diameter < M 16 > M 16 all diameters Unit N/mm Kgf/mm N/mm Kgf/mm N/mm Kgf/mm Tensile Stength Min Yield Strength, 0.% offset Min Proof Lead Stress Shear Strength, Min Brinell HB Hardness Rockwell HRC Elongation % on GL = 5.65A. 1% Min. 9 % Min. A= Cross Sectional Area. Recommended Tightening Torques and Induced Loads : Property Class 8.8 Property Class 10.9 Thread Stress Torque Induced Load Torque Induced Load Size Area mm Nm Kgm. N Kgs. Nm Kgm. N Kgs. M M5 M6 M8 M10 M1 (M14) M16 (M18) M0 (M) M4 (M7) M The tightening torques calculated to induce approximate stresses as under in screw threads: 448 n/mm for Property Class 8.8 dia < M16 46 N/mm for Property Class 8.8 dia > M N/mm for Property Class (M33) M36 (M39) M

3 Inch Series, UNC-Dimensions 1. The bolts and screws will generally conform to ANSI B (Bolts/Screws) made to ANSI B will also generally conform to B.S.1768).. Threads will conform to class A of ANSI B1.1 or BS 1580 for Unified threads (Coarse Fine). 3. Material : Panchsheel Fasteners High grade carbon/alloy steel. 4. Heat Treatment : As per SAE grade 5 or 8 (Bolts/Screws made to SAE grade 5 and 8 will also generally conform to requirements of grade 'S' & 'V' of BS 1768 respectively. 5. Thread Length LT: LT1 for L < 6 LT for L > 6 6. Screw lengths equal to or shorter than those listed in row 'LET' will be threaded to head. 7. All dimensions are in inches. Length of Thread Thread Pitch W C B H R Q Size UNC Max. Min. Max. Nom. Min. Min. LT1 LT LFT Length Range L 1/4" 5/16" 3/8" 7/16" 1/ " 5/8" 3/4" 7/8" 1" /4-1 1/-.1/ /8-1.1/8 1/ /4 1/ /8-1.3/8 3/4-3.1/ /4 1.1/ 1.1/ 3/4-3.1/ / 1.3/4 1.7/ /4.1/8 1.1/ /4.3/8 1.1/ /4.1/.5/8 1.1/-8 3

4 Inch Series, UNC-Physical Properties-Tightening Torques : Grade Grade 5 Grade 8 Tensile Strength (Min) Proof Load Stress 1000 lbs/in lbs/in 84.5 Kgf/mm 105.4Kgf/mm lbs/in lbs/in 59.9 Kgf/mm 84.5 Kgf/mm Elongation % on GL = 4 x Gauge Dia 14% 1% Rockwell Hardness RC 5-34 RC Recommended Tightening Torques and Induced Loads UNC Thread Thread Stress Grade 5 Grade 8 Size Area Torque Induced Load Torque Induced Load 1/4" /16" /8" /16" /" /8" /4" /8" "

5 P.F. Hexagon Nuts Metric Series-dimensions-Physical Properties 1. The nuts will generally conform to IS : 1364, ISO 403, DIN 934, Threads will conform to class 6H of IS : 418, Coarse Series. 3. Material & Heat Treatment To achieve mechanical properties of Property Class 8 or 10 of IS : 1367-VI. ISO 898/ 4. Nuts of Property Class 8 are used with bolts of Property Class 8.8 Nuts of Property Class 10 are used with bolts of Property Class 10.9 (In general, nuts of a higher property class can replace nuts of a lower property class in a joint) 5. In Bolts/Nut assembly, tightening should be done by rotation of nut. Torque values as recommended in tables for bolts (p:5). 6. Sizes in brackets are non-preferred standards. 7. All dimensions are in millimeters. Dimensions : Thread Pitch W C H Size Max. Min. Max. M4 M5 M6 M8 M10 M1 (M14) M16 (M18) M0 (M) M4 (M7) M30 (M33) M36 (M39) M Property Class 8 Property Class 10 Physical Properties Nuts Size Proof Load Hardness Hardness Proof Load Hardness Hardness Stress HV HR Stress HV HRC Over To N/mm Min. Max Min. Max N/mm Min. Max Min. Max M HRB HRC 30 M4 M M7 M HRB M10 M M16 M HRC 19 HRC

6 P.F. Hexagon Nuts Metric Series, UNC-Dimensions-Physical Properties 1. The nuts will generally conform to ANSI B 18.. (Nuts made as per ANSI B 18.. will also generally conform to BS 1768).. Threads will conform to class B of ANSI B 1.1 and BS 1580 for Unified threads (coarse/fine) 3. Material & Heat Treatment To achieve mechanical properties of SAE grade 5 or 8 (Nuts made to SAE grade 5 and 8 will also generally conform to requirements of grade 1 & 5 of B.S respectively). 4. In Bolts/Nut assembly, tightening should be done by rotation of nut. Torque values as recommended in tables for bolts (p:7). 5. All dimensions are in inches. Dimensions : Thread T. P. I. W C H Size UNC Max. Max. Nom. 1/4" /16" /8" /16" /" /8" /4" /8" " Physical Properties Grade For use with Proof Load Size Rockwell Bolts of Stress Hardness Grade Lbs/in 5 5 All Sizes RC 3 max 78.9 kgf/mm Lbs/in Up to 5/8" RC kgf/mm above 5/8" RC 6-34 Up to 1" 6