How do you read a bolt part number?
The number following the dash indicates the length in eighths (1/8) of an inch up to 7/8. If a bolt is longer than an inch the first digit is the number of inches and the second digit is the number of eighths. For example: AN3-12 is a bolt with 3/16 inch diameter and the length is 1 inch plus 2/8 or 1-1/4 inch long.
What do the numbers for bolts mean?
Diameter: the larger the number, the larger the fastener. Pitch: the larger the number, the more coarse the thread (the fewer the threads per unit of measure); coarse is the most common metric thread and is assumed when pitch isn’t specified.
What is the highest grade bolt?
grade 8 bolt
A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards.
What are the markings on a bolt fastener?
Proof Load (psi) Yield Strength Min (psi) Tensile Strength Min (psi) STANDARD BOLT IDENTIFICATION MARKINGS Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in.) This technical information is supplied as a courtesy.
How to identify the size of a bolt?
AN bolt nomenclature follows this format: ANd(H) – g(A) d is the bolt diameter (in sixteenths of an inch) H indicates that the head is drilled for safety wire (no H indicates undrilled head) g refers to the grip length* A indicates that the shank is NOT drilled for a cotter pin (no A indicates drilled shank)
How are SAE bolts identified by their length?
SAE bolts are identified by overall shank length, and they generally have much longer threads. AN bolts are called out by grip length, and they have shorter threads. Grip refers to the unthreaded portion of the shank.
Where can I find the NSN part number?
ISO Group has comprehensive parts databases, including an up-to-date National Stock Number NSN Database, that can be searched by NSN, NSN Part Number, NIIN and many other combinations of information such as NSN Part or NSN Part Number.
Proof Load (psi) Yield Strength Min (psi) Tensile Strength Min (psi) STANDARD BOLT IDENTIFICATION MARKINGS Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in.) This technical information is supplied as a courtesy.
AN bolt nomenclature follows this format: ANd(H) – g(A) d is the bolt diameter (in sixteenths of an inch) H indicates that the head is drilled for safety wire (no H indicates undrilled head) g refers to the grip length* A indicates that the shank is NOT drilled for a cotter pin (no A indicates drilled shank)
Is there a hole in the end of a bolt number?
The next digit of the Part Number, if any, will be A or nothing. AN bolt numbers ending in A do not have a hole in the threaded end, for a safety pin (the hole is Absent). AN bolt numbers without the A at the end will have a hole drilled in the threads, for the safety pin.
Where do you measure the head of a hex bolt?
For fasteners where the head usually sits above the surface such as hex bolts and pan head screws, the measurement is from directly under the head to the end of the fastener.