Item # HCS12500XXX, Hex Cap Screw, 1-1/4" Nominal Dia. On Sales Systems Ltd.

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Sales Systems Limited Products and Services > Fasteners Reference Guide > Bolts / Screws > Square and Hex Bolts and Screws > Hex Cap Screws > Item # HCS12500XXX


	Item # HCS12500XXX, Hex Cap Screw, 1-1/4" Nominal Dia.

Rolled Thread Hex Cap Screws

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Top of Head. Top of head shall be full form and chamfered, with the diameter of chamfer circle being equal to the maximum width across flats within a tolerance of minus 15 percent.
Wrenching Height, J. Wrenching height is a distance measured from the bearing surface up the side of the head at the corners. The width across corners shall be within specified limits for the full wrenching height.
Bearing Surface. Bearing surface shall be flat and washer

Manufacturer · Specifications · Codes and Standards · Thread Length for Screw Lengths

Manufacturer

Manufacturer		Industrial Fasteners Institute

Specifications

Product		Square and Hex Bolts and Screws

Unit of Measure		English

Nominal Size or Basic Product Diameter		1-1/4 in

Nominal Size or Basic Product Diameter (Decimal)		1.2500 in

Max. Body Diameter (E)		1.2500 in

Min. Body Diameter (E)		1.2390 in

Basic Width Across Flats (F)		1-7/8 in

Max. Width Across Flats (F)		1.875 in

Min. Width Across Flats (F)		1.812 in

Max. Width Across Corners (G)		2.165 in

Min. Width Across Corners (G)		2.066 in

Basic Head Height (H)		25/32 in

Max. Head Height (H)		0.813 in

Min. Head Height (H)		0.749 in

Min. Wrenching Height (J)		0.530 in

Max. Transition Thread Length (Y)		0.714 in

Max. Circular Runout of Bearing Surface FIM		0.033 in

Codes and Standards

Codes and Standards		ASME B18.2.1 1996

Thread Length for Screw Lengths

Nom. L_T for Screw Length (6 in. and Shorter)		2.750 in

Nom. L_T for Screw Length (Over 6 in.)		3.000 in

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	· Cut Thread Hex Cap Screws

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