687PDC 687PDC. Parker SAE standard fittings with UN/UNF threads and screw-in connectors with O-ring are designed for connection with UNF screw-in threads. They are also known as O-Ring Boss (O.R.B.) connections. Correctly assembled, they offer as good performance as the best leak-free connections with screw-in threads. Suitablework materials. 303 STAINLESS STEEL 304 STAINLESS STEEL 410 STAINLESS STEEL. 8740(SNCM240) Spiral Pointed Taps for Nickel Base Alloys. ZELX® NI. Size Ranges. UNJC・・・No.4~3/4 UNJF・・・No.6~3/4. List No. 3612 Machine Screw sizes 3622 Fractional sizes. Forexample, inch threads with a 3A fit have tighter tolerances than threads with a 2A fit. For technical drawings and 3-D models, click on a part number. Inch. Thread Size. Thread Type: Hardness: Material: Choose a For Thread Fit: Pitch Dia. Tolerance : Each: Go Gauge. Class X. 0-80. UNF. Rockwell C60: Tool Steel: Class 2A, Class 3A-0.0002" to Whatis the difference between unf and npt? The abbreviation UNF stands for “Unified National Fine”, this is thread with a fine pitch. The tool for UNF is labeled AF, ANSI/ASME B1.1. UNF threads are most commonly found in the aerospace industry. NPT stands for National Pipe Tapered threads, also known as ANSI/ASME B1.20.1 pipe threads. Axisof internal thread INTERNAL THREADS-CLASS 2B ASME B1.1 Nominal Size & Threads per Inch Series Designation Allowance Minor Diameter Pitch Diameter Major Diameter 3/8-24 UNF 0.0011 0.330 0.340 0.3479 0.3528 0.0049 0.3750 7/16-14 UNC 0.0014 0.360 0.376 0.3911 0.3972 0.0061 0.4375 Onceyou know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! 9/16 - 24 UNEF : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. Preciseexternal thread cutting in stainless steel with HSSE thread cutting die UNF 3/8 x 24 factory outlet ex stock Dimension : UNF 3/8 x 24: Characteristics. Product group Thread standard : UNF: American Fine Unified National thread according to ANSI B1.1: Tolerance : 2A: Direction : Right: Standard : DIN 223 (DIN EN 2256: Material Code62 Flange HeadO.D. 1.25 1.62 1.88 2.12 2.50 3.12 British Thread BSPP/BSPT 1/8 - 28 1/4 - 19 3/8 - 19 1/2 - 14 3/4 - 14 1 - 11 1 ¼ - 11 1 ½ - 11 Copper NylonAir Brake Thread 7/16 - 24 17/32 - 24 11/16 - 20 13/16 - 18 1 - 18 SAE 45-FlareThread 5/16 - 24 3/8 - 24 7/16 - 20 1/2 - 20 5/8 - 18 11/16 - 24 3/4 - 16 7/8 - 14 11/16 - 14 Inverted Onceyou know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! 1 3/16 - 16 16-UN : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. ThreadSize: 3/8-24 UNF: Outside Diameter: 25.4mm: Thickness: 9mm: Material: HSS: 64 In stock - FREE next working day delivery available . 27 available from Europe for delivery within 1 working day(s). Add to Basket. Units. Add to basket. Check stock levels. Add to a parts list. Added. View Basket. Price Each. £15.58 (exc. VAT) £18.70 (inc. VAT) BVL3rq.