Unbrako™ Fasteners

Socket Cap Screw Distributor – Flat Head Shoulder Bolts

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’s™ 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. Download our brochure.

Unbrako™ offers the following socket screw and related products:

• Socket Head Cap Screws
  • Standards — Alloy Steel & Stainless Steel
  • Low Heads
• Shoulder Screws
• Flat Head Socket Screws
• Button Head Socket Screws
• Socket Set Screws
• Square Head Set Screws
• Pressure Plugs
  • Dryseal
  • LEVL-SEAL®
  • PTFE TELFLON® -coated LEVL-SEAL
• Hex Keys — Short Arm, Long Arm and 6″ Long Arm
• LOC-WEL® Self-Locking Socket Screws
• Dowel Pins
• Metric Socket Screw 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’s™ 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, and organic platings (standard, propriety, and unique-to-application coatings)

The Dale Company is your go-to socket cap screw distributor for all your Unbrako™ Fasteners, flat head shoulder bolts, and more. Call us today to request a quote!

tensile psi (room temp.)	107 cycle dynamic fatigue (psi)	operating temperatures (unplated)	Types		Application/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)
Types		Applications/Features	Hardness	Operating Temperatures (unplated)
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 Coated		PTFE 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)

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Specials are made to order with short lead times STOCKED SIZES AVAILABLE

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Specializing in Unbrako Screws, Unbrako Pressure Plugs, Unbrako Dowel Pins, socket head cap screws, socket set screws, flat head socket screws, square head set screws, LOC-WEL (R) Self-Locking Socket Screws, Metric socket screw products.