Socket Head Cap Screw

Model / MPN: 20420-004 ITEM 17 | NSN: 5305-01-250-4643

An externally threaded fastener whose threaded portion is of one diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Product Details

NATO Stock Number

5305-01-250-4643

Sold in multiples of

1 EA

DEMIL

Thread Class

Thread Direction

Right-hand

Thread Length

Between 5.195 inches and 5.375 inches

Fastener Length

Between 5.295 inches and 5.375 inches

Head Style

Flat chamfer

Head Diameter

Between 0.735 inches and 0.750 inches

Head Height

Between 0.492 inches and 0.500 inches

Hole Diameter

Between 0.061 inches and 0.067 inches

Internal Drive Style

Hexagon

Thread Diameter

0.500 inches

Width Across Flats

0.375 inches

Hole Quantity

Hole Type

Drilled

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

170000 pounds per square inch

Hardness Rating

38.0 rockwell c and 45.0 rockwell c

Minimum Yield Strength

150000 pounds per square inch

Hole Configuration Style

Round internal hexagon

Material

Steel

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, type 2, class 3 federal specification single treatment response

Thread Series Designator

Unf

20420 Series Parts

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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ISO 9001:2015 + AS9120B
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20420-004 ITEM 17 Cross Reference

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