Reliability, higher pressures, stresses and speeds in today's machines and equipment demand stronger, more reliable joints and stronger, more reliable fasteners to hold them together. Unbrako® high quality, high strength socket cap screws offer joint reliability and safety with maximum strength and fatigue resistance ensuring you a superior, safer product that meets your most challenging fastener and joint issues.

Unbrako offers the following socket screw and related products:

Unbrako's Engineered Fasteners team can design and manufacture virtually any fastener, in any size or configuration, to solve your toughest fastening problems.
Their worldwide production facilities and distribution channels give you the capacity you need to ensure a timely supply for even the highest-volume OEM applications.

Unbrako™ Engineered Fasteners have been put to the extreme test in such performance sensitive areas as small engines, braking systems, power generating equipment, heavy manufacturing, and commercial printing equipment. Unbrako's™ proven engineered fasteners consistently perform where others have failed

Unbrako offers:

• Hexagon sockets, TORX® drive configurations, 12-point, hex drives
• Internal and external threads
• Full threaded and double-ended studs
• Alloy steel, stainless steel, carbon steel and exotic alloys
• Large sizes
• Lengths up to 144" (3600mm)
• Thread rolling capability through 3" (75mm) diameter
• Specific thread designs and root radius run-outs
• Cadmium, zinc, tin, chemical black oxide, phosphate, Teflon® based coatings and organic platings (standard, propriety and unique-to-application coatings)

PERFORMANCE (See Note 1)
tensile psi (roomtemp.)	107 cycle dynamic fatigue (psi)	operating temperatures (unplated)
			TYPES		APPLICATIONS /FEATURES
Socket Head Cap Screws 1960 Series Alloy Steel		Use alloy for maximum tensiles; up to 190,000 psi, highest of any socket cap screw	190,000	20,000	550°F
			180,000
Socket Head Cap Screws 1960 Series Stainless Steel		Use stainless for corrosive, cryogenic or elevated temperature environments, hygienic cleanliness.	95,000	30,000	800°F
Socket Head Cap Screws Low Head Series		Use in parts too thin for standard height heads and where clearance is limited	170,000	20,000	550°F
Shoulder Screws		Tool and dieindustry standards; also replace costly special parts-shafts, pivots, clevis pins, guides, trunnion mountings, linkages, etc.	heat treat level psi	shear strength in psi	550°F
			160,000	96,000
Flat Head Socket Screws Alloy/ Stainless		Uniform, con-head angle for trolled 82° under maximum flush ness and side wall contact; non-slip hex socket prevents marring of material	160,000	96,000	550°F
					800°F
Button Head Cap Screws Alloy/ Stainless		Low heads streamline design, use in materials too thin to countersink; also for noncritical loading requiring heat treated screws	160,000	96,000	550°F
					800°F

			PERFORMANCE (See Note 1)
			hardness	operating temperatures (unplated)
TYPES		APPLICATIONS /FEATURES
Square Head Set Screws		Half-dog or self-locking cup points only. Use where maximum tightening torques are required	Rc 45 (min.)	450° F
Socket Set Screws Alloy Steel		Fasten collars, sheaves, gears, knobs on shafts. Locate machine parts. Cone, half-dog, flat, oval, cup and self-locking cup points standard	Rc 45-53	450°F
Socket Set Screws Stainless Steel		Use stainless for corrosive, cryogenic or elevated temperatures environments. Plain cup point standard. Other styles on special order	Rb96-Rc33	800°F
Pressure Plugs 3/4" Taper Dryseal		Features common to 3/4" and 7/8" tapers: Dryseal threads for positive seal without sealing compound; controlled chamfer for faster starting	Rc 34-40	550°F
				800°F
			Rb 82 Typical	400°F Brass
7/8" Taper LEVL-SEAL® Pressure Plug		LEVL-SEAL® plug features: controlled 7/8" tape in 3/4" taper hole seats plug level, flush with surface within 1/2 pitch. LEVL-SEAL plug is an UNBRAKO original	Rc 35-40	550°F
			Rb 82 Typical	400°F Brass
PTFE/ TEFLON Coated		PTFE/TEFLON coated plugs seal at 60% lower seating torques without tape or compound; install faster at lower cost; smaller sizes can be power installed; LEVL-SEAL plug type for 100% flush seating	Rc 35-40	450°F (uncoated)
Hex Keys		Tough, ductile, for high torquing; accurate fit in all types socket screws; size marked for quick identity	Rc 47-57	torsional shear in-lb. min. 1.2 to 276.000
Dowel Pins (Standard)		Formed ends, controlled heat treat; close tolerances; standard for die work; also used as bearings, gages, precision parts, etc.	core: Rc 50-58	calculated shear psi	surface
				150,000	8 microinch (max)
Dowel Pins Pull-Out Type		For use in blind holes. Easily removed without special tools. Reusable, Save money. No need for knock-out holes. Same physicals, finish, accuracy and tolerances as standard UNBRAKO dowel pins.	surface: Rc 60 (min.)	150,000	8 microinch (max)
NOTE 1: Performance data listed are for standard production items only. Non-stock items may vary due to variables in methods of manufacture. It is suggested that the user verify performance on any non-standard parts for critical applications.