FASTENER SIZE AND THREAD PATTERN - TM-9-2350-256-20

TABLE F-2. TORQUE LIMITS FOR WET FASTENERS

TM-9-2350-256-20 Carrier Cargo Tracked 6-Ton M548A1 (2350-01-096-9356) M548A3 2350-01-369-6081 Manual
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TM 9-2350-256-20 TABLE F-3. TORQUE RANGES. Stated Range Most Effective Range 0-200 pound-inches (lb-in.) (0-23 N m) 50-150 lb-in. (6-17 N m) 15-75 lb-ft (20-102 N m) 30-60 lb-ft (41-81 N m) 0-175 lb-ft (0-237 N m) 44-131 lb-ft (60-178 N m) 0-600 lb-ft (0-813 N m) 150-450 lb-ft (203-610 N m) F-4 FASTENER SIZE AND THREAD PATTERN Threaded fasteners are categorized according to the dia. of the fastener shank. Thread styles are divided into broad groups, the two most common being coarse (Unified Coarse [UNC] ) and fine (Unified Fine [UNF] ). These groups are defined by the number of threads per 1 in. (25.4 mm) on the bolt shank. In addition, threads are categorized by thread class (see Table F-4), which is a measure of the degree of fit between the threads of the bolt or screw (external threads) and the threads of the attaching nut or tapped hole (internal threads). The most common thread class for bolts and screws is Class 2. TABLE F4. THREAD CLASSES AND DESCRIPTION. External Internal Fit 1A 1B Loose 2A 2B Medium 3A 3B Close Thread patterns are designed as follows: NOTE Unless followed with-LH (e.g., 3/4-10-UNC-2A-LH), threads are right-hand. F-5

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