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
Flat Head Socket Screws
Button Head Socket Screws
Socket Set Screws
Square Head Set Screws
PTFE TELFLON® -coated LEVL-SEAL
Hex Keys — Short Arm, Long Arm and 6″ Long Arm
LOC-WEL® Self-Locking Socket Screws
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.
Alloy steel, stainless steel, carbon steel, and exotic alloys
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!
Width of Hook
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tensile psi (room temp.)
107 cycle dynamic fatigue (psi)
operating temperatures (unplated)
Socket Head Cap Screws 1960 Series Alloy Steel
Use alloy for maximum tensiles; up to 190,000 psi, highest of any socket cap screw
Socket Head Cap Screws 1960 Series Stainless Steel
Use stainless for corrosive, cryogenic or elevated temperature environments, hygienic cleanliness.
Socket Head Cap Screws Low Head Series
Use in parts too thin for standard height heads and where clearance is limited
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
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
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
PERFORMANCE (See Note 1)
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.)
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
Socket Set Screws Stainless Steel
Use stainless for corrosive, cryogenic or elevated temperatures environments. Plain cup point standard. Other styles on special order
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
Rb 82 Typical
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
Rb 82 Typical
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
Tough, ductile, for high torquing; accurate fit in all types socket screws; size marked for quick identity
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
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.)
8 microinch (max)
24 HOUR SERVICE
Specials are made to order with short lead times STOCKED SIZES AVAILABLE
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.