Reference Material
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Fastener Materials

We offer a huge on-hand selection of headed fasteners in a variety of materials. We also offer many varieties of fasteners in special materials. Download our fastener materials reference for the most up to date information. minus

The materials list below is provided as an example. Delta Fastener Corp. will certainly quote you any material(s) you may require. Forward any material specification(s) for quote our sales department at sales@deltafastener.com

17-4 PH, AL-6XN, A-286, A-325, A-490, ASTM-B8T (321), Alloy, Alloy 2507, Aluminum, B7, B7M, Brass, Bronze, Duplex 2205, Duplex Stainless, Super Duplex, Ferralium 225, Grade 5,Grade 8, L7, L7M, Low Carbon, Nylon, Nickel Alloy, RA-330, Silicon, Silicon Bronze, Titanium, 904L 410, 304L, 310, 316L, 347, 416 Free Machine, 2507, Zeron 100

Carpenter 20@

Nickel Alloy (200)

Monel@ (400, 405 & K-500)

Inconel@ Inconel@, Inconel 600@, Inconel 601@, Inconel 625@, Inconel 718@, Inconel 725@, Inconel X-750@, Inconel 800HT@

Incoloy@, Inconel 600@, Inconel 625@, Inconel 718@, Inconel 800H@, Inconel 800HT@, Inconel 825@

Nimonic@ Nimonic 80A@, Nimonic 901@

Nitronic 50@, Nitronic 60@

Hastelloy@, Hastelloy B-2@, Hastelloy C-22@, Hastelloy C-276@, Hastelloy G-30@, Hastelloy X@

MN35P@

254 SMO@

Stainless (Austenitic)

302, 303, 304, 304L, 309, 310, 316, 316L, 317, 317L, 321, 347

Stainless (Super Austenitic)

25-6, 330, 333, 904L, AL-6XN, 20 Cb-3

Stainless (Martensitic)

410, 416, 420, 422, 431, 440C, 501

Stainless (Ferritic)

430

Stainless (Precipitation Hardening)

A-286, 13-8 PH, 15-5 PH, 14-4 PH

Duplex Stainless (Austenitic-Ferritic)

2205, 255

Alloy Steel

Aluminum (2024, 6061)

Brass

Bronze

Carbon Steel

Titanium (Grades 2, 5 & 7)

Monel@, Inconel@, Inconel 718@and Incoloy@ is a registered trademark of Inco Alloys International.

Hastelloy@ is a registered trademark of Haynes International.

Nimonic@ is a registered trademark of Crucible Specialty Metals.

Nitronic@ is a registered trademark of Armco, Inc.

MP35N@ is a registered trademark of SPS Technologies.

Carpenter 20@ is a registered trademark of Carpenter Technologies

254 SMO@ is a registered trademark of Avesta Sheffield

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Fastener Head Styles

Use this document to identify Head styles. This reference provides you with over 30 different style of headed fasteners to aid you in your decision. minus

The head styles list below is provided as an example. Delta Fastener Corp. will certainly quote you any style(s) you may require. Forward any head style specification(s) for quote our sales department at sales@deltafastener.com

82flathead

82flathead

Supplied to standard dimensions with and 80 deg. and 82 deg. Angle to be used where finished surfaces require a flush fastening unit. The countersunk portion offer good centering possibilities.
82ovalhead

82ovalhead

Fully specified as "oval countersunk", this head is identical to the standard flat head, but possesses, in addition, a rounded, neat appearing upper surface for attractiveness of design.
82UCflathead

82UCflathead

This is the standard flat head 80 deg. to 82 deg. countersunk screw with the lower one-third of the countersunk portion removed to facilitate production of extremely short lengths. As illustrated, it will fit a standard counterbore hole and is particularly adaptable flush assemblies in thin stock.
82UCovalhead

82UCovalhead

This is the standard oval head 80 deg. to 82 deg. countersunk screw with the lower one-third of the countersunk portion removed to facilitate production of extremely short lengths. As illustrated, it will fit a standard counterbore hole and is particularly adaptable flush assemblies in thin stock.
90flathead

90flathead

The special 90 deg. to 100 deg. flat head screw has been developed for application requiring flush surfaces, and is recommended for use in soft materials, to distribute pressure over a larger les angular surface. Very well adapted for use with thin aluminum, soft plastics, etc.
90ovalhead

90ovalhead

The special 90 deg. to 100 deg. oval head screw has been developed for application requiring flush surfaces, and is recommended for use in soft materials, to distribute pressure over a larger les angular surface. Very well adapted for use with thin aluminum, soft plastics, etc
90UCovalhead

90UCovalhead

This is the standard oval head 90 deg. to 100 deg. countersunk screw with the lower one-third of the countersunk portion removed to facilitate production of extremely short lengths. As illustrated, it will fit a standard counterbore hole and is particularly adaptable flush assemblies in thin stock.
binderhead

Binderhead

Most generally used in electrical and radio work because of it identifying undercut beneath the head, which binds and eliminates the fraying of stranded wire. Offers and attractively designed, medium-low head with ordinarily sufficient bearing surface. Not ordinarily recommended as a Phillips recessed head - see Pan Head for better functional design.
buglehead

Buglehead

Specialized screw with a bugle head that is designed to attach drywall to wood or metal studs, however it is a versatile construction fastener with many uses. The diameter of drywall screw threads is larger than the shaft diameter. Similar to countersunk, but there is a smooth progression from the shaft to the angle of the head, similar to the bell of a bugle.
buttonhead

Buttonhead

Cylindrical with a rounded top
cheesehead

Cheesehead

Disc with cylindrical outer edge, height approximately half the head diameter
fliisterhead

Fliisterhead

The standard oval fillister head has a smaller diameter than the round head, but is higher with a correspondingly deeper slot The smaller diameter head increase the pressure applied on the smaller area and can be assembled close to flange and raised surfaces. Headed in counterbore dies to ensure concentricity, they may be used successfully in counterbore holes.
hexwasher

Hexwasher

Produced in the same manner as the standard indented hexagon with a washer section at the base of the head to protect the finish of the assembly from wrench disfigurement.
indhexhead

Indhexhead

An inexpensive wrench head fastener made to standard hexagon head dimensions. The hex is completely cold upset in a counterbore die and possesses an identifying depression in the top surface of the head.
panhead

Panhead(for recessed panheads)

Recommended for new designs to replace round, truss and binding heads. Provides low large diameter head, but with characteristically high outer edge along the outer periphery of the head where driving action is most effective for high tightening torques. Slightly different head contour where supplied with recessed head.
roundhead

Roundhead

Mot recommended for new designs (see pan head). This head was the most universally used design in the past.
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Fastener Thread Styles

Sheet metal screws come in a variety of thread styles. Use this reference to help you choose. minus

A. FULL DIAMETER SHANK:

Equal to major diameter of thread. Produced by cut thread or by roll thread on extruded blank. Characteristic of machine bolts and cap screws.

B. UNDERSIZED SHANK:

Equal approximately to pitch diameter of thread. Produced by roll threading a non-extruded blank. Characteristic of machine screws.

D. PITCH DIAMETER:

The simple, effective diameter of screw thread. Approximately half way between the major and minor diameters.

E. MAJOR DIAMETER:

The largest diameter of a screw thread.

F. MINOR DIAMETER:

The smallest diameter of a screw thread.

LEAD:

The distance a screw thread advances axially in one turn.

CUT THREAD:

Threads are cut or chased; the unthreaded portion of shank will be equal to major diameter of thread.

Fastener_Thread

ROLLED THREAD:

Threads are cold formed by squeezing the blank between reciprocating serrated dies. This acts to increase the major diameter of the thread over and above the diameter of unthreaded shank (if any), unless an extruded blank is used. Classes of thread are distinguished from each other by the amounts of tolerance and allowance specified. External threads or bolts are designated with the suffix "A"; internal or nut threads with "B".

CLASSES 1A and 1B:

For work of rough commercial quality where loose fit for spin-on-assembly is desirable.

CLASSES 2A and 2B:

The recognized standard for normal production of the great bulk of commercial bolts, nuts and screws.

CLASSES 3A and 3B:

Used where a closed fit between mating parts for high quality work is required.

CLASS 4:

A theoretical rather than practical class, now obsolete.

CLASS 5:

For a wrench fit. Used principally for studs and their mating tapped holes. A force fit requiring the application of high torque for semi-permanent assembly.

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Fastener Drive Styles

Having trouble identifying the drive style of your fastener. This reference document provides visuals and descriptions of over 15 different drive types available. minus

The drive style list below is provided as an example. Delta Fastener Corp. will certainly quote you any drive style(s) you may require. Forward any drive style specification(s) forquote our sales department at sales@deltafastener.com

externallobe

External 6 Lobe

onewayslot

One-way Slot

T-G

teehead

Teehead

lobe

Lobe

hexsocket

Hexsocket

hex

Hex

hexwasher

Hexwasher

square

Square

lobecombination

Lobecombination

squareslotcombination

Square/Slot

combination

slotted

Slotted

quadrex

Quadrex combination

phillipshex

Phillips/Hex

phillipsslot

Phillipsslot

phillips

Phillips

frearson

Frearson

phillipstype1

Phillipstype1

slotcombination

Slotcombination

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Plating and Finish Styles

Choosing the palting or finish is made easier with this reference. Over 20 different styles and description shown. minus

The platings and finishes list below is provided as an example. Delta Fastener Corp. will certainly quote you any plating or finish you may require. Forward any plating and finish specification(s) for quote our sales department at sales@deltafastener.com

Plating/Finish Color Corrosion Resistance Material Characteristics/Uses
Black Zinc Black Very Good All Metals Same Characteristics as Black Nickel with greater rust resistance.
Bonderizing Dull Gray Very Good Ferrous Metals Chemical process for rust proofing steel.
Brass Brass Good Mostly Steel Applied to steel for matching purposes.
Bronzes Ranging from Bright Straw to Dull Bronze Copper Fair All Metals Decorative
Burnish Statuary or Antique Bronze None All Metals Enhances appearance of stainless steel.
Cadmium Silver (Dull or Burnished) Very Good All Metals Rust resistance, good electrical conductivity. Highly Toxic and Very Expensive.
Chromate Yellow, Olive, Drab, Black, Blue White Good All Metals Process added to zinc. (Greatly improves rust resistance)
Chromium Bright Blue White Very Good All Metals SubstantiallyWeatherproof. Ultimate in beauty where appearance is desired
Colored Dyes Most Any Color Good All Metals Process added to zinc for matching or color coating
Copper Copper Fair All Metals Mostly used as a undercoating for nickel
Dichromate Dip Rainbow Cast Good All Metals Dipping process for Zinc or Cadmium that greatly improve rust resistance.
ES-500 Bright GRA-1 Excellent All Metals A dipping process applied over zinc or Cadmium. Low Cost
Iridite Olive Drab, Green, Black, Red, Blue, Bronze Good All Metals Mostly applied over Zinc or Cadmium for coloring and additional rust resistance.
Nickel Silver Very Good All Metals Hard and Stable Finish.
Oxide (Black) Luster Black Good Stainless Steel & Ferrous Metals Emersion process does not add to thickness. Good wear qualities.
Painting Various Colors Very Good All Metals Usually a lacquer enamel finish applied to match other painted surfaces.
Parkerizing Dull Gray or Black Very Good Ferrous Metals A chemical process of rust proofing steel.
Passivating Very Good Stainless Steel A nitric acid dip applied to stainless steel. Aids in corrosion resistance
Phosphate & Oil Black Very Good Steel Used in no appearance application. Low Cost.
Polyseal White, Blue, Black, Red Excellent Steel Coating used to match mating surface.
Stalgard Dull Silver Excellent All Metals Dipping process applied over zinc.
Teak Bronze Excellent Stainless Steel & Ferrous Metals Matches teakwood on boats.
Tinning-Electro Silver Gray Good Mostly Ferrous Metals A tin-plating by electrolysis. Also acts as lubricant for drivability.
Unbar Bright Blue White Excellent Steel or Brass Equal to 400 Stainless Chrome plated.
Zinc (Electro-Galvanizing) Gray Good All Metals Good Corrosion Resistance
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Grade Markings

Choosing the right under head configurations is made easier with this reference. Over 15 different style shown. minus

The material grade list below is provided as an example. Delta Fastener Corp. will certainly quote you any material(s) grade you may require. Forward any materialgrade specification(s) for quote our sales department at sales@deltafastener.com

Grade Specification Fastener Description Material Nominal Size Range Proof Load Yield Strength Tensile Strength Specification
Grade 1 SAE J429 Grade 1 Bolts, Screw, Studs Low or Medium Carbon Steel 1/4 thru 1-1/2 33,000 psi. 36,000 psi. 60,000 psi. SAE J429 Grade 1
Grades A & B ASTM A307 Grade A & B Bolts, Screws, Studs Low Carbon Steel 1/4 thru 4 60,000 psi. ASTM A307 Grade A & B
Grade 2 SAE J429 Grade 2 Bolts, Screws, Studs Low or Medium Carbon Steel 1/4 thru 3/4, Over 3/4 to 1-1/2 55,000 psi. 33,000 psi. 57,000 psi. 36,000 psi 74,000 psi. 60,000 psi. SAE J429 Grade 2
Grade B6 ASTM A193 Grade B6 Bolts, Screws, Studs for high temperature service. AISI 410 1/4 thru 4 85,000 psi. 110,000 psi. ASTM A193 Grade B6
Grade B7 ASTM A193 Grade B7 Bolts, Screws, Studs for high temperature service. AISI 4140, 4142 or 4145 1/4 thru 2-1/2, Over 2-1/2 thru 4, Over 4 thru 7 105,000 psi. 95,000 psi. 75,000 psi. 125,000 psi. 115,000 psi. 100,00 psi. ASTM A193 Grade B7
Grade B8 ASTM A193 Grade B8 Bolts, Screws, Studs for high temperature service. AISI 304 1/4 thru 2-1/2, Over 2-1/2 thru 4, Over 4 thru 7 30,000 psi. 75,000 psi ASTM A193 Grade B8
Grade B8C ASTM A193 Grade B8C Bolts, Screws, Studs for high temperature service. AISI 347 1/4 and Larger 30,000 psi. 75,000 psi ASTM A193 Grade B8C
Grade BM ASTM A193 B8M Bolts, Screws, Studs for high temperature service. AISI 316 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A193 B8M
Grade B8T ASTM A193 Grade B8T Bolts, Screws, Studs for high temperature service. AISI 321 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A193 Grade B8T
Grade B8 ASTM A320 Grade B8 Bolts, Screws, Studs for low temperature service. AISI 304 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A320 Grade B8
Grade B8C ASTM A320 Grade B8C Bolts, Screws, Studs for low temperature service. AISI 347 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A320 Grade B8C
Grade B8T ASTM A320 Grade B8T Bolts, Screws, Studs for low temperature service. AISI 321 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A320 Grade B8T
Grade B8F ASTM A320 Grade B8F Bolts, Screws, Studs for low temperature service. AISI 303 OR 303Se 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A320 Grade B8F
Grade B8M ASTM A320 Grade B8M Bolts, Screws, Studs for low temperature service. AISI 316 1/4 and Larger 30,000 psi. 75,000 psi. ASTM A320 Grade B8M
Grade 5 SAE J429 Grade 5 Bolts, Screws, Studs Medium Carbon steel, Quenched and Tempered 1/4 thru 1, Over 1 thru 1-1/2 85,000 psi. 74,000 psi. 92,000 psi. 81,000 psi. 120,000 psi. 105,000 psi. SAE J429 Grade 5
Grade 5 ASTM A449 Bolt, Screws, Studs Medium Carbon steel, Quenched and Tempered 1/4 thru 1, Over 1 thru 1-1/2, Over 1- 1/2 thru 3 ASTM A449
Grade A325 ASTM A325 Type 1 High Strength Structural Bolts Medium Carbon steel, Quenched and Tempered 1/2 thru 1, 1-1/8 thru 1-1/2 85,000 psi. 74,000 psi. 92,000 psi. 81,000 psi. 120,000 psi. 105,000 psi. ASTM A325 Type 1
Grade A325 Type 2 ASTM A325 Type 2 High Strength Structural Bolts Medium Carbon steel, Quenched and Tempered 1/2 thru 1 85,000 psi. 92,000 psi. 120,000 psi. ASTM A325 Type 2
Grade A325 Type 3 ASTM A325 Type 3 High Strength Structural Bolts Atmospheric Corrosion Resisting Steel, Quenched and 1/2 thru 1, 1-1/8 thru 1-1/2 85,000 psi. 74,000 psi. 92,000 psi. 81,000 psi. 120,000 psi. 105,000 psi. ASTM A325 Type 3
Grade BB ASTM A354 Grade BB Bolts, Studs Alloy Steel, Quenched and Tempered 1/4 thru 2-1/2, 2-3/4 thru 4 80,000 psi. 75,000 psi 83,000 psi. 78,000 psi. 105,000 psi. 100,000 psi. ASTM A354 Grade BB
Grade BC ASTM A354 Grade BC Bolts, Studs Alloy Steel, Quenched and Tempered 1/4 thru 2-1/2, 2-3/4 thru 4 105,000 psi. 95,000 psi 109,000 psi. 99,000 psi. 125,000 psi. 115,000 psi. ASTM A354 Grade BC
Grade 7 SAE J429 Grade 7 Bolts, Screws Medium Carbon Alloy Steel, Quenched and Tempered 1/4 thru 1-1/2 105,000 psi. 115,000 psi. 133,000 psi. SAE J429 Grade 7
Grade 8 SAE J429 Grade 8 Bolts, Screws, Studs Alloy Steel, Quenched and Tempered 1/4 thru 1-1/2 120,000 psi. 130,000 psi. 150,000 psi. SAE J429 Grade 8
Grade BD ASTM A354 Grade BD Bolts, Screws, Studs Medium Carbon Alloy Steel, Quenched and Tempered 1/4 thru 1-1/2 120,000 psi. 130,000 psi. 150,000 psi. ASTM A354 Grade BD
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Terms and Conditions

Please use this reference as a guide regarding Terms and Conditons that may apply to Quotes and Orders.

  • Payment Terms are 1%, 10 Days - Net 30.
  • All invoices are due and payable in US Dollars.
  • All invoices should be remitted to P.O. Box 7562, Houston, Texas 77270-7562.
  • All quotations are valid for 30 days, unless otherwise noted.
  • Quantity shipped on specials or made-to-order items may vary +/- 10% of ordered quantity.
  • Specials and made-to-order items, as well as modified and altered products are nonreturnable.
  • Stock items returned for credit are subject to a restocking charge.
  • No returns will be accepted without a return materials authorization number (RMA#.)
  • All claims for shortages and defective material must be made immediately but no later than 30 days of receipt.
  • Delta Fastener Corporation disclaims any responsibility for design and/or engineering defects and hereby limits express or implied warranties to liability for replacement cost of product(s) supplied. No liability is assumed for parts re-worked, changed, modified, plated, etc.
  • Delta Fastener Corporation will not be held liable for any dimension(s), specification(s) or information omitted at the time of quotation. Delta Fastener Corporation will apply ANSI B18.3 specifications for the appropriate missing information.
  • Any special document requirements (((for instance, materials test reports (MTR's) and certificate of compliance (C of C's))) must be made at time of order.
  • The change or deletion of any items or quantities may require a new quote.
  • On specials, payment terms may require cash in advance with balance due on delivery or credit approval.
  • All quotes and orders are FOB Houston unless otherwise agreed to in advance.