Markings on Japanese Arisaka Rifles and Bayonets of World War II. All requests to be listed in the handbook should be addressed to: Defense Supply Center Philadelphia (DSCP) Attention: DSCP-NASA 700 Robbins Avenue. As made, the bolt would have been all Remington parts. Metric and SAE bolts are each specific in the way they are rated and read. The mastermind behind many of today's sporting bolt-action rifles and semi-automatic pistols is the 1870s manufactured Mauser rifle. It is the first rifle developed to fire the 8MM Mauser cartridge successfully. Photo credit goes to Trident82. Mauser M-98 straight bolt Body Mauser 98k WW 2 Bolt Body 6.25" long Mauser M-1909 Bolt Mauser 33-40 note dished out bolt handle. Although markings are shown on hex heads, grade markings apply equally to products with other head configurations. Email: Length is measured from under the head. Think twice before you substitute OEM hardware with a cheap cornerstore alternative. 5305 - Screws, 5306 - Bolts, 5307 - Studs, and 5310 - Nuts. Coats of Arms and other markings on Mauser turnbolt rifles and carbines are extremely varied. The bolt is a spare part and the bolt shroud/safety is a unit manufactured by Smith-Corona. 43 Bolt Action SingleHamilton & Son No. The exception is F1554 and A307 grade C in which stamping is a supplemental requirement while color coding is required. Additonal information on bolts is located at the bottom of the webpage. For a grade C nut, it's 60˚. If it does not have a marking, it is a commercial grade bolt. Firearm Identification: A Guide for the Complete Beginner. Please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts. Grade identification markings on metric fasteners per ISO 898-1. Houston TX 77011. Transcription . As you found out they're hard to identify. When nuts are machined from bar stock the nut must be additionally marked with the letter "B." 3. parts A. J. The dimensional requirements are contained in ANSI B18.2.1, "Square and Hex Head Bolts and Screws Inch Series". Grade 2 ASTM-A307 SAE-J429 (Call us for specifications. There are six radial lines on the heads of Grade 8 bolts. Click here - Printable Metric Bolt Grade Chart (PDF) Printable Chart for easy comparison between Metric Bolt Classes and US grades equivalents. When marked, the identification marking Figure 4. Determining Bolt Grades & Understanding Head Markings The Nut and Bolt Solution Series. The strength and type of steel used in a bolt is supposed to be indicated by a raised mark on the head of the bolt. The military Model 25 has a thick, cast cover, while the 27 and civilian-model 25s have a thinner cover, will accept taller gears, and backed V-6s. Bolt Identification Markings. Rifles, Action type: Break Action, Bolt Action, Lever Action, Pump Action, Semi-Automatic, and Short Action vs. Long Action Rifles. Most have their original receiver markings plus an issue date of 1920, (and rarely 1921). English bolts have radial lines on their head to identify the grade, or strength class. Like all intake bolts have same mark, all pumps same, etc. General requirement in ASTM A962. Not all vehicles are set up the same, even though they may be the same make and model. Just a few examples of appraisal values for Model 14 22 single shot bolt action. Such markings differ based on how the fasteners were made. The first number gives the breaking strength of the steel in the bolt, In round terms it is in the 10's of kgs per square millimetre of the bolt. I have not heard of P or KS. Aerospace bolt head markings will vary by manufacturer as each manufacturer has a trademarked head marking. Fasteners commonly have two different markings: a unique manufacturer identification symbol - such as letters or an insignia - and information about the fastener strength. The tables below gives the head markings and some of the most commonly-needed information concerning the bolts. Bolts, Screws, Studs 60,000 Bolts, Screws, Studs ASTM A307 Grades A&B 60,000 STANDARD BOLT IDENTIFICATION MARKINGS Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in.) The type of mark depends on the standard to which the bolt was manufactured. Bolts, Screws, Studs Low- or medium- quenched and tempered ISO R898 Class 5.8 All size thru 1 ½ ISO R898 Class 8.8 All size thru 1 ½ 33.000 36.000 Note: Some bolts share identical head identification and have significantly different strengths. Some Colts will be marked "MPC". Identification markings are specified in the first column of tables I thru VII. [1] Manufacturer's identification symbols Marks, tensile strength, yield point and proof load figures explained. PROOF MARKS 2403 The proof marks shown below will assist in determining nationality of manufacturers when no other markings are evident. Some will have none, like yours. parts. English bolts have radial lines on their head to identify the grade, or strength class. If you do not have a magnet you can still identify Grade 8 bolts by brushing the head of the bolt using a wire brush and counting its radial lines. Click on image below to enlarge . Image Courtesy Don Francis. Yield Strength (MPa) Min. 16mm - 72mm : 600: 660: 830: Class 10.9 Alloy steel, quenched and tempered: 5mm - 100mm . Mauser 98 Intermediate Bolt Body 6" long Mauser M-98a carbine Bolt has a 90% tun and a handle that is flat and checkered on the bottom. Hex Bolt Identification, Markings and Strength Chart Table Guide. These markings are often used to identify surplus rifles. Mosin Rifle Markings: This list is in no way complete. Fastener manufacturers mark the heads of their bolts and screw with the identification mark. Contact American Fastener with any questions or for a custom quote. Metric grades 8.8.,10.9 and 12.9 (socket products). Fasteners, Inc 252 Kruse Ave Monrovia, CA 91016 Akko Fastener, Inc 6855 Cornell Rd Cincinnati. For further information, see the appropriate standard. Rear Axle Identification. 6 Radial Lines Mechanical Properties. Bolts should not be separated from rifles in storage, especially where bolts bear different numbers to the rifles they are fitted to. 3 Mechanical Properties and Identification Markings for Threaded Fasteners www.practicalmaintenance.net Introduction A standard or a norm is a document containing agreements, specifications or criteria about a material, product, process or service. Lower-grade fasteners will stretch more easily than higher-grade fasteners. Alkali is right about the bolt . When marked, the identification marking shall be the grade letter O, A or B. These radial lines indicate that the bolt is a Grade 8 bolt. Bolt heads and nuts are often marked with numbers, letters, dashes, slashes, dots, or an assortment of other marks. x Bolt 1 550 Hupp warren, Ml 48089 End Ot pont optanal. 1903a3 identification.information + Reply to Thread. 800. BOLT IDENTIFICATION MARKINGS Marchio di identificazione Identification Grade Mark Specificazione Specification Descriz. The height of the markings is commensurate with the size of the fastener(s) being marked. As additional manufacturers submit their markings, the handbook will be updated. or S.A.E) are categorized by grade, from grade 2 to grade 8, where the grade represents inch strength. The bolt heads also have a code of normally two or three letters that indicate the manufacturer. Line stamped under "B8". Some fastener heads don't have lines. Click here to download a printable . The ratings for standard bolts, often identified as SAE, and metric hardware aren't interchangeable. Toll Free: 800-991-1280 Fax: 713-675-6066 Local: 713-675-0123 zerofast@zerofast.com GM 8.25" IFS - Late Model Full Size Truck GM 8.5" -1970-Present Car, 1977-99 Truck (C-Clip Axles) Ring Gear Diameter: 8.25" Ring Gear Diameter: 8.5" Notches were added on later to accomodate the forward assist . Tensile Strength (MPa) Class 8.8 Medium carbon steel, quenched and tempered: All sizes below 16mm: 580: 640. Our Fastener Identification Markings Chart has a complete list of bolt grades with accompanying head markings. Three radial lines will indicate an SAE grade 5 fastener, while six radial lines will indicate an SAE grade 8 fastener. Custodian: Preparing activity: Army - WC Army - WC . For bolts and screws longer than 6 in. This chart helps to identify the grades of bolts using the identification marks on the bolt's head along with the strength and hardness of common grade bolts. The higher the grade, the stronger the bolt. bsa spoke kits . English bolts (U.S.S. Fasteners bear all forms of markings on their heads, from number and letters, to shapes and hash marks. (Above) Early model SP1 smooth sided bolt carrier without notches. The number of lines on the bolt head is 2 less than the actual grade. In addition to these markings, most reputable bolt manufacturers will also stamp their trademark in the head of the bolt, which allows for easy identification and accountability. Does anyone recognize the following bolt head identification: A large central "F" surrounded by 12 equally spaced radial dashes? please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts. 22 caliber bolt action rifle.The Winchester Model; Hamilton & Son No. Some will have manufacturer's marks. Learn more about: Long Guns vs. Handguns, Basic Parts of a Long Gun, Shotguns vs. BYSA Lee Enfield manual, version 6.1, November 2018. Here we have a bolt head with the Wilson-Garner manufacturer mark and six radial lines. 307A 307B A325 A449 BC BD A490 H - K G 9 for additional technical information, contact fastenal engineering at engineer@fastenal.com. Comments . Usually these marks indicate the bolt's manufacturer. Mauser K98 rifles produced in Germany bear the Nazi Swastika and the German Ax code on the receiver. or S.A.E) are categorized by grade, from grade 2 to grade 8, where the grade represents inch strength. If there are no numbers or lines present on the fastener, assume it is no better than a . But what do they mean? Mauser-pattern bolt-actions were manufactured in countries including Germany, Turkey, Poland, Czechoslovakia, Sweden, Belgium, Argentina and Chile, so the round the rifle fires can help you identify the rifle . Some will have vendor's marks. Properties shown . Every aerospace bolt will have a head marking. Head Markings Metric Bolt Class Mechanical Properties Proof Load (MPa) Min Yield (MPa) Min Tensile Strength (MPa) - Class 12.9 - Alloy Steel, quenched and tempered 970 1,100 1, To be able to be classed as stainless it will have a chemical composition of at least 10.5% Chromium, and meet other requirements depending on what stainless steel grade it should be.. A moly drop test is a chemical test showing the presence of Molybdenum which is present in grade . bsa 1959 to 66 500 & 650 twins front drum hub; bsa 1967 to 70 650 & a75 front drum hub; bsa 1971 to 1973 a65, a70, a75 & b50gs front drum The markings indicate who manufactured the bolt and also identify the standard to which the bolt was made. 2. Other Bolt Head Markings Screws And Bolts Stainless. A quick aside - You may notice that in the images the WG mark has been moved around a bit to accommodate the grade markings. In 1987, head marking requirements changed from requiring no grade identification to requiring a '307A' marking on the head in addition to the manufacturer's identification. Grade 2 requirements for sizes 1/4 through 3/4 in apply only to bolts and screws 6 in. Contact Us. All Mauser K98 rifles are bolt-action with a fixed five-round internal magazine. Mail: info@duplexfastener.com +91-22-66363233 The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. TDS-005A 2-15-08. bolt identification and grade . elemento di fissaggio Fastner description Materiale . These are the most common grades, but there are others. The chambering can easily identify the Mauser K98 rifle. bsa 1959 to 66 500 & 650 twins front drum hub; bsa 1967 to 70 650 & a75 front drum hub; bsa 1971 to 1973 a65, a70, a75 & b50gs front drum A nice looking rifle with sharp markings. Below is an example of the G33/40, that was made in 1941, and bears the maker's code "dot 1941." Note also in the pictures below the differences between the standard K98 and the G33/40. Grade 1 requirements shall apply. Identification Grade Mark Specification Fastener Description Material Nominal Size Range (in.) 4. 2. Imperial Bolt acceptance proofs Amberg Bolt proofs Prussian Naval Bolt Proofs Prussian Bolt Proofs Modified Gew98 Rifles in the post Imperial period The modified Gew.98's are easily identified. The only true way to ensure specification compliance is a material elementary analysis with an X-Ray Spectrometer. Mexican M-191 0, Straight handle M-1936, has a sight 30% turn down on bolt handle Symbol for identification of grade, i.e., "B8", applied to head. Page 8 of 40 Identifying bolt grades and head markings for US grades 2, 5 and 8. Mechanical Properties Proof Load(psi) Yield Strength Min (psi) Tensile Strength Min (psi) NoGradeMark SAE J429 Grade 1 Bolts, Screws, Studs Low or Medium Carbon […] Colt__BCM__LMT. The Model/Type markings are generally found on the top of the receiver, forward (towards to muzzle) of the chamber and generally indicate original caliber unless modified by another country at a later date. OH 45242 Standard Metric marking marking marking Albany Fasteners/ Pawtucket Fastener DIV 327 Pine st Pawtucket, RI 02862 S B PMC Allfast Fastening Systems 15200 Oon Julian Rd It is a basic list of markings found on rifles and may help you to identify what you are looking at: Tula Markings:May be on Barrel Shank or Receiver or Stock: Tula Hammer (pre 1928) on the Receiver Tula Arrow in Star (post 1928) on the Barrel Shank Tula Star Bolt body Tula Hammer in Circle . Most of these rifles were still in use during the Sino-Japanese War of the 1930s and the Pacific War of the 1940s. In most cases, bolts used in machinery are made to SAE standard J429, and bolts used in structural applications are made to ASTM standards. When securing a fastener, use the torque specifications from the following tables. BOLT HEAD MARKINGS and Strength Standards -- UT-121. Metric Bolts: Head Marking Class and Material Nominal Size Range (mm) Mechanical Properties ; Proof Load (MPa) Min. Direct Number: (817) 467-1377 800 Number: (800) 361-6627 Fax Number: (817) 467-5365 1916 Peyco Drive North Arlington, TX 76001. 4. GRADE IDENTIFICATION MARKINGS - INCH STEEL BOLTS Grade Marking Specification / Description Material Nominal Size inches Proof Load psi Tensile Strength min psi Yield Strength min psi Rockwell Hardness min max SAE J429 - Grade 1 Bolts, screws, studs Low or medium carbon steel 1/4 - 1 1/2 33000 60000 36000 B70 B100 SAE J429 - Grade 2 Bolts . Written December 4, 2007, modified October 24, 2014. Ok the only markings are Fabrique Nationale on the front of the reciever with herstal-leige underneath. manufacturer identification. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. Grade 8 bolts are for heavy-duty applications. A. Bolts Bolts can be identified by the marking(s) located on the head of each bolt. MARKING REQUIREMENTS 6.1 Markings and application. manufacturer identification. The illustration below, depicts typical and common aircraft ( AN and NAS ) type bolts and their identifying markings. The procedures should include: (a) In the case of hex head bolts, most of them come with markings. Match the cartridge the rifle fires with a likely country of origin and model. Bolt heads and nuts are often marked with numbers, letters, dashes, slashes, dots, or an assortment of other marks. (Photo courtesy of Fastenal Co.) Grade 2 is standard hardware grade steel. This includes identification markings that may be removed during a maintenance process (e.g., grinding, machining, cleaning, etc.). Download a complimentary PDF of our Fastener Markings chart. Aerospace bolt head markings are used to identify the different head types on the bolt itself. Marking required in ASTM A193/A320 for bolt and ASTM A94 for Nut. HOW TO IDENTIFY A MAUSER RIFLE CORRECTLY? Hex Bolt Identification, Markings and Strength Chart. There are some marking on the underside of the reciever, but I'm not sure I can explain em. Here are some manufacturer's marks on three common bolts. Video 1: Determining Bolt Grade and Head Markings Size Hardness Rockwell Proof Load Yield . But first, you should know the difference between standard and metric fasteners. Duplex Fasteners 89, 2nd Pathan Street, Maruti Mandir Marg, 5th Kumbharwada, Mumbai, India 400 004. 43 Bolt Action Single Shot Rifle: For your consideration is . Common Bolt Head ID Markings . Sometimes, the nuts are referred to as Grades 2, 5 and 8 to correspond with their compatible bolts. This is the date that the rifles were inventoried and released Nuts are not required to be marked unless specified by the purchaser. These included: the bolt, stock, cleaning rod, sight hood cover, upper hand guard, barrel bands, sling, and even the bayonet. Bolts heads of different types are stamped with differing markings for two purposes. Traceability is important particularly in the case of fastener failure. A. For example: A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. The others are RBW, SBC, C and L5. To help you find the right part, we first need to properly identify the axle you have or need. Title: Metric Bolts Grades Author: www.FastenerBlackBook.com Subject: Metric Bolt Classes Keywords: Metric Bolt Grades; Metric Bolt Classes; Bolt Grade Markings and strength chart; Metric bolt tensile strength; Metric Bolt Identification; Bolt class 4.6; Bolt class 5.8; Bolt class 8.8; Bolt class 10.9; Bolt class 12.9; Common Metric Steel Bolts; Identification Mark; Material; Tensile Strength . This technical information is supplied as a courtesy. In the examples below, the circumference line between the line and the dot in a grade B nut is 120˚. Bolt Head Markings. Mudge Fasteners wants to help you decipher these head markings and when you'll need to know them. For a comparison of early and later model bolt carriers, please see the SP1 Early vs Late Model bolt pictorial. Winchester Model 1902 22 Caliber Bolt ActionWinchester Model 1902 22 Caliber Bolt Action Rifle: Included in this lot is a Winchester Model 1902 . . Zero Products, Inc. 219 Baywood. Most of the bolts were bought in batches and dumped in the bolt boxes for that assembly, so mixed markings were common, but I would stick to one marking for the whole assembly.
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