• Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  • The minimum radius is one half of the value shown.
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Unit of Measure
Items
T Head Bolts

T-Head Bolt, with 0.260" Body Dia.
T Head Bolts

T-Head Bolt, with 0.324" Body Dia.
T Head Bolts

T-Head Bolt, with 0.388" Body Dia.
T Head Bolts

T-Head Bolt, with 0.452" Body Dia.
T Head Bolts

T-Head Bolt, with 0.515" Body Dia.
Manufacturer N/A Industrial Fasteners Institute
Product N/A Round Head Bolts
Codes and Standards N/A ASME B18.5 1990 (R1998)
Unit of Measure N/A English
Nominal Size or Basic Bolt Dia. N/A 1/4 in N/A 5/16 in N/A 3/8 in N/A 7/16 in N/A 1/2 in
Nominal Size or Basic Bolt Dia. (Decimal) N/A 0.2500 in N/A 0.3125 in N/A 0.3750 in N/A 0.4375 in N/A 0.5000 in
Max. Body Dia. (E) N/A 0.260 in N/A 0.324 in N/A 0.388 in N/A 0.452 in N/A 0.515 in
Min. Body Dia. (E) N/A 0.237 in N/A 0.298 in N/A 0.360 in N/A 0.421 in N/A 0.483 in
Max. Head Length (A) N/A 0.500 in N/A 0.625 in N/A 0.750 in N/A 0.875 in N/A 1.000 in
Min. Head Length (A) N/A 0.488 in N/A 0.609 in N/A 0.731 in N/A 0.853 in N/A 0.975 in
Max. Head Width (B) N/A 0.280 in N/A 0.342 in N/A 0.405 in N/A 0.468 in N/A 0.530 in
Min. Head Width (B) N/A 0.245 in N/A 0.307 in N/A 0.368 in N/A 0.431 in N/A 0.492 in
Max. Head Height (H) N/A 0.204 in N/A 0.267 in N/A 0.331 in N/A 0.394 in N/A 0.458 in
Min. Head Height (H) N/A 0.172 in N/A 0.233 in N/A 0.295 in N/A 0.356 in N/A 0.418 in
Basic Head Radius (K) N/A 0.438 in N/A 0.500 in N/A 0.625 in N/A 0.875 in N/A 0.875 in
Max. Fillet Radius (R) N/A 0.031 in
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