Item # item-3081, Type IA Short Screw, with 0.284" Recess Dia. On Sales Systems Ltd.

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Sales Systems Limited Products and Services > Fasteners Reference Guide > Bolts / Screws > Tapping Screws > Type IA Cross Recessed Oval Countersunk Trim Head Tapping Screws > Item # item-3081


	Item # item-3081, Type IA Short Screw, with 0.284" Recess Dia.

Type IA Cross Recessed Oval Countersunk Trim Head Tapping Screws:Long Screws with Shoulder and Short Screws

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This type of recess has a large center opening, wide straight wings, and blunt bottom, with all edges relieved or rounded.

Applicable to screw types as indicated by code symbols.

Type AB thread forming.
Types B and BP thread forming and Types BF and BT thread cutting.
Type C thread forming and Types D, F, G, and T thread cutting.

Manufacturer · Specifications · Codes and Standards

Manufacturer

Manufacturer		Industrial Fasteners Institute

Specifications

Product

Tapping Screws

Unit of Measure

English

Type

Type IA Short Screws

Nominal Size or Basic Screw Dia.

5/16 in

Nominal Size or Basic Screw Dia. (Decimal)

0.3125 in

Head Size

1/4 in

Applicable to Screw Types¹

Ref. Recess Dia. (M)

0.284 in

Ref. Recess Depth ((T)

0.168 in

Ref. Recess Width (N)

0.057 in

Driver Size

Max. Recess Penetration Gaging Depth

0.155 in

Min. Recess Penetration Gaging Depth

0.137 in

Max. Protrusion Above Gaging Dia. (F)

0.129 in

Min. Protrusion Above Gaging Dia. (F)

0.095 in

Gaging Dia. (G)

0.424 in

¹ 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square

Codes and Standards

Codes and Standards		Abstract of ASME B18.6.4 1998

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		Type Designations for Tapping Screws and Metallic Drive Screws (PDF, 206KB)

Item # item-3081, Type IA Short Screw, with 0.284" Recess Dia.

Manufacturer