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Paulin® Papco® 073-581 Partial Threaded Hex Head Cap Screw, 1/2 in, 1-1/4 in L Under Head, 5 Grade, Medium Carbon Steel, Bare Metal

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Description

Paulin® Papco® Hex Head Cap Screw, Partial Threaded, Series: 073, Measurement System: Imperial, 1/2 in Thread, 1-1/4 in Length Under Head, 5 Grade, Medium Carbon Steel, Bare Metal, UNC Thread, 3/4 in W x 5/16 in H Head, Hex Head, 120000 psi Tensile Strength, Material Specification: ASME B18.2.1-1996, SAE J429, 1-1/4 in Minimum Thread Length, C25 to C34 Rockwell Hardness

Hex Head Cap Screws are used to secure an object within or against another object. They are recognized with specific features like tighter tolerances and a chamfered end with a washer face under the head. The bare metal finish (non-plated) is ideal for indoor use or where corrosion is not a concern. Grade 5 cap screws are made from medium carbon steel, quenched, and tempered for increased tensile strength; head markings identified with three radial bars.

Specifications

Diameter - Thread Size 1/2 in
Finish Bare Metal
Grade 5
Hardness C25 to C34 Rockwell
Head Size 3/4 in W x 5/16 in H
Head Type Hex
Length Under Head 1-1/4 in
Material Medium Carbon Steel
Material Specification ASME B18.2.1-1996, SAE J429
Measurement System Imperial
Minimum Thread Length 1-1/4 in
Series 073
Tensile Strength 120000 psi
Thread Type UNC
Type Partial Threaded

Features

  • Papco® grade 5 cap screws, identified by the three radial bar head marking, are made of medium carbon steel, quenched and tempered for higher tensile strength and holding power
  • Double heat treated
  • Medium carbon steel quenched and tempered C: 0.28 to 0.55, P: 0.025 maximum, S: 0.025 maximum
  • For studs only, sulfur content may be 0.13% maximum
  • There shall be a sufficient hardenability to ensure a microstructure consisting of approximately 90% martensite in the core of threaded sections of the fasteners after hardening and quenching and before tempering

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