{"id":389264,"date":"2024-10-20T03:49:09","date_gmt":"2024-10-20T03:49:09","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asme-b18-2-1-2012-r2021\/"},"modified":"2024-10-26T07:00:30","modified_gmt":"2024-10-26T07:00:30","slug":"asme-b18-2-1-2012-r2021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asme\/asme-b18-2-1-2012-r2021\/","title":{"rendered":"ASME B18.2.1 2012 R2021"},"content":{"rendered":"

This Standard covers the complete general and dimensional data for nine product types of inch series square and hex bolts and screws. Hex flange head and lobed head designs are new in this revision, as are screw sizes 1 5\/8, 1 7\/8, and 3 1\/8 through 6 inches. Appendices covering gages and gaging information plus formulas on which dimensional data are based are included. Heavy hex structural bolts, formerly covered in ANSI B18.2.1, are now covered in ASME B18.2.6.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
3<\/td>\nErrata to ASME B18.2.1-2012 <\/td>\n<\/tr>\n
7<\/td>\nCONTENTS <\/td>\n<\/tr>\n
8<\/td>\nFOREWORD <\/td>\n<\/tr>\n
11<\/td>\nASME B18 COMMITTEE ROSTER <\/td>\n<\/tr>\n
12<\/td>\nCORRESPONDENCE WITH THE B18 COMMITTEE <\/td>\n<\/tr>\n
13<\/td>\n1 INTRODUCTION
1.1 Scope
1.1.1
1.1.2
1.2 Comparison With ISO Standards
1.3 Dimensions
1.4 Options
1.5 Terminology
1.6 Referenced Standards <\/td>\n<\/tr>\n
14<\/td>\n2 GENERAL DATA FOR BOTH BOLTS AND SCREWS
2.1 Heads
2.1.1 Top of Head.
2.1.2 Width Across Flats.
2.1.3 Head Height.
2.1.4 True Position of Head.
2.2 Bolt or Screw Length
2.3 Body Diameter <\/td>\n<\/tr>\n
15<\/td>\n2.4 Points
2.5 Threads
2.5.1 Thread Standard.
2.5.2 Thread Class.
2.5.3 Thread Series.
2.5.4 Incomplete Thread Diameter.
2.5.5 Thread Acceptability.
2.6 Straightness
2.7 Optional Machining: Countersunk Center Holes, Locking Elements, and Drilled Holes
2.8 Materials
2.9 Finish
2.10 Workmanship
2.11 Designation
2.11.1
2.11.2 <\/td>\n<\/tr>\n
16<\/td>\n2.12 Grade and Manufacturer\u0152s Identification
2.12.1 Identification Symbols.
2.12.2 Grade Symbols.
2.12.3 Source Symbols.
2.13 Quality Assurance
3 BOLTS
3.1 Surface Condition
3.2 Head Taper
3.3 Bearing Surface
3.4 Body Diameter
3.5 Reduced Diameter Body
3.6 Length Tolerance
3.7 Thread Length <\/td>\n<\/tr>\n
17<\/td>\nTables
Table 1 Dimensions of Square Head Bolts <\/td>\n<\/tr>\n
18<\/td>\nTable 2 Dimensions of Hex Bolts <\/td>\n<\/tr>\n
19<\/td>\nTable 3 Dimensions of Heavy Hex Bolts <\/td>\n<\/tr>\n
20<\/td>\nTable 4 Dimensions of Askew Head Bolts
Table 5 Length Tolerances for Bolts <\/td>\n<\/tr>\n
21<\/td>\n3.8 Material
3.9 Additional Requirements
4 SCREWS
4.1 General
4.2 Top of Head
4.2.1 Hex Cap and Heavy Hex Cap Screws.
4.2.2 Hex Flange and Lobed Head Screws.
4.3 Washer Face
4.4 Bearing Surface Runout
4.5 Fillet
4.6 Body Diameter <\/td>\n<\/tr>\n
22<\/td>\nTable 6 Dimensions of Hex Cap Screws <\/td>\n<\/tr>\n
24<\/td>\nTable 7 Dimensions of Heavy Hex Screws <\/td>\n<\/tr>\n
26<\/td>\nTable 8 Dimensions of Hex Flange Screws <\/td>\n<\/tr>\n
28<\/td>\nTable 9 Dimensions of Lobed Head Screws <\/td>\n<\/tr>\n
29<\/td>\nTable 10 Dimensions of Underhead Fillets <\/td>\n<\/tr>\n
30<\/td>\nFigures
\n
Fig. 1 Underhead Fillet for Long Screws
Fig. 2 Underhead Fillet for Short Screws Threaded Full Length
Table 11 LG, Maximum and LB, Minimum Limitations for Short Screws Threaded Full Length <\/td>\n<\/tr>\n
31<\/td>\n4.7 Thread Length
4.8 Length Tolerances
4.9 Material
4.10 Additional Requirements
5 LAG SCREWS
5.1 General
5.2 Head Taper
5.3 Bearing Surface
Fig. 3 LG, Maximum and LB, Minimum for Short Screws Threaded Full Length <\/td>\n<\/tr>\n
32<\/td>\nTable 12 Maximum Grip Gaging Lengths, LG, and Minimum Body Lengths, LB, for Screws Except Flange Head <\/td>\n<\/tr>\n
35<\/td>\n5.4 Body Diameter
5.5 Reduced Diameter Body
5.6 Thread
5.7 Thread Length
5.8 Material
5.9 Additional Requirements
Table 13 Length Tolerances for Screws <\/td>\n<\/tr>\n
36<\/td>\nTable 14 Dimensions of Square Lag Screws <\/td>\n<\/tr>\n
37<\/td>\nTable 15 Dimensions of Hex Lag Screws
Table 16 Dimensions of Lag Screw Threads <\/td>\n<\/tr>\n
39<\/td>\nMANDATORY APPENDIX I GAGE AND GAGING PRACTICES FOR EXTERNAL LOBED HEAD DRIVE SYSTEM
I-1 SCOPE
I-2 DEFINITIONS
I-3 GAGE TYPE
I-3.1 GO Gages
I-3.2 NOT GO Gages
I-4 INSPECTING EXTERNAL CONFIGURATION
I-5 ACCEPTANCE CRITERIA <\/td>\n<\/tr>\n
42<\/td>\nNONMANDATORY APPENDIX A FORMULAS FOR BOLT AND SCREW HEAD DIMENSIONS <\/td>\n<\/tr>\n
44<\/td>\nNONMANDATORY APPENDIX B WEIGHT IN POUNDS OF 100 STEEL HEX CAP SCREWS FOR GIVEN DIAMETER\/LENGTH COMBINATION <\/td>\n<\/tr>\n
45<\/td>\nNONMANDATORY APPENDIX C COUNTERSUNK CENTER HOLES <\/td>\n<\/tr>\n
46<\/td>\nNONMANDATORY APPENDIX D SELF-LOCKING ELEMENT AND DRILLED HEAD GUIDELINES
D-1 SELF-LOCKING ELEMENT
D-2 DRILLED HEAD <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ASME B18.2.1 – 2012(R2021) Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASME<\/b><\/a><\/td>\n2012<\/td>\n50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":389272,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2643],"product_tag":[],"class_list":{"0":"post-389264","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-asme","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/389264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/389272"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=389264"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=389264"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=389264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}